首页 > 最新文献

Applied Environmental Research最新文献

英文 中文
Dual-Polarimetric Radar Applications for Investigating Severe Thunderstorms in Northern Thailand during the Pre-Monsoon Season 双极坐标雷达在泰国北部季风前期强雷暴调查中的应用
Q3 Environmental Science Pub Date : 2023-12-27 DOI: 10.35762/aer.2023026
N. Mahavik, S. Tantanee, Fatah Masthawee
Understanding the physical characteristics of severe pre-monsoon thunderstorms is crucial for mitigating the adverse impacts of natural disasters on people in tropical regions. On April 23, 2020, a severe storm affected the Chiang Khong District of the Chiang Rai Province in Northern Thailand, causing devastation to more than 500 houses with hail and strong winds. This study investigated the storm's physical characteristics using dual-polarimetric radar data from the Thai Meteo-rological Department (TMD). Using a combination of polarimetric radar variables, such as reflectivity (ZH), specific differential phase (KDP), differential reflectivity (ZDR), and copolar correlation coefficient (ρhv), fuzzy logic was utilized to classify the hydrometeor types. During the severe storm that affected the Chiang Khong District, hail and large raindrops were mixed in with the rain, according to the analysis. Two severe storms were observed in the unorganized mesoscale convective systems that were analyzed, with the second storm producing more intense effects due to the radar reflectivity shape of a bow echo that generated strong wind gusts. The Doppler radar data retrieved the wind field, indicating the convergence of intense local winds during the storm, which was consistent with the analysis results of synoptic-scale weather systems from ECMWF Reanalysis v5 (ERA5). In addition, a Hovmöller diagram revealed orographic enhancement of the convective cloud as the storm passed through mountainous regions prior to approaching the Chiang Khong District. The findings of this study can provide valuable information for TMD's near-real-time warning operation in order to minimize loss of life and property from future severe storms.
了解季风前强雷暴的物理特征对于减轻自然灾害对热带地区居民的不利影响至关重要。2020 年 4 月 23 日,一场强风暴影响了泰国北部清莱府的清孔县,冰雹和强风摧毁了 500 多所房屋。本研究利用泰国气象局(TMD)提供的双偏振雷达数据对风暴的物理特征进行了研究。利用偏振雷达变量组合,如反射率 (ZH)、比差相位 (KDP)、差分反射率 (ZDR) 和共极相关系数 (ρhv),利用模糊逻辑对水文气象类型进行了分类。根据分析,在影响清孔地区的强暴风雨中,雨中夹杂着冰雹和大雨滴。在分析的无组织中尺度对流系统中观测到了两场强风暴,其中第二场风暴由于产生强阵风的弓形回波的雷达反射形状而产生了更强烈的影响。多普勒雷达数据检索了风场,表明风暴期间有强烈的局地风汇聚,这与 ECMWF Reanalysis v5(ERA5)对同步尺度天气系统的分析结果一致。此外,Hovmöller 图显示,对流云在接近清孔地区前穿过山区时发生了地形增强。本研究的结果可为 TMD 的近实时预警行动提供宝贵信息,以尽量减少未来强风暴造成的生命和财产损失。
{"title":"Dual-Polarimetric Radar Applications for Investigating Severe Thunderstorms in Northern Thailand during the Pre-Monsoon Season","authors":"N. Mahavik, S. Tantanee, Fatah Masthawee","doi":"10.35762/aer.2023026","DOIUrl":"https://doi.org/10.35762/aer.2023026","url":null,"abstract":"Understanding the physical characteristics of severe pre-monsoon thunderstorms is crucial for mitigating the adverse impacts of natural disasters on people in tropical regions. On April 23, 2020, a severe storm affected the Chiang Khong District of the Chiang Rai Province in Northern Thailand, causing devastation to more than 500 houses with hail and strong winds. This study investigated the storm's physical characteristics using dual-polarimetric radar data from the Thai Meteo-rological Department (TMD). Using a combination of polarimetric radar variables, such as reflectivity (ZH), specific differential phase (KDP), differential reflectivity (ZDR), and copolar correlation coefficient (ρhv), fuzzy logic was utilized to classify the hydrometeor types. During the severe storm that affected the Chiang Khong District, hail and large raindrops were mixed in with the rain, according to the analysis. Two severe storms were observed in the unorganized mesoscale convective systems that were analyzed, with the second storm producing more intense effects due to the radar reflectivity shape of a bow echo that generated strong wind gusts. The Doppler radar data retrieved the wind field, indicating the convergence of intense local winds during the storm, which was consistent with the analysis results of synoptic-scale weather systems from ECMWF Reanalysis v5 (ERA5). In addition, a Hovmöller diagram revealed orographic enhancement of the convective cloud as the storm passed through mountainous regions prior to approaching the Chiang Khong District. The findings of this study can provide valuable information for TMD's near-real-time warning operation in order to minimize loss of life and property from future severe storms.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"47 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139154548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distribution of Exchangeable Magnesium in Lowland Rice-Cultivated Soils of Sri Lanka as Affected by the Differences in Climate, Soil, and Water Source 受气候、土壤和水源差异影响的斯里兰卡低地水稻种植土壤中可交换镁的分布情况
Q3 Environmental Science Pub Date : 2023-12-27 DOI: 10.35762/aer.2023027
Indeera Hetti Arachchige, B. Marambe, Mohomad S. Nijamudeen, H. Kadupitiya, Dinaratne Sirisena, R. Chandrajith, L. Suriyagoda
Magnesium (Mg) is an essential macronutrient for plants. Even though Sri Lankans consume rice as the staple food, the Mg status in Sri Lankan paddy soils as affected by its climate, soils, and water sources used are not well understood. This study was conducted to (i) determine the distribution of exchangeable Mg (ex-Mg) concentration, and (ii) examine the interactive effects of agro-climatic zones (ACZs), soil order, and water source in determining the ex-Mg concentra-tion in lowland paddy fields of Sri Lanka. A total of 9,038 soil samples representing six ACZs, six soil orders, and three water sources were collected using a stratified random sampling approach. The ex-Mg concentration was determined after extracting in 0.01 M CaCl2 and detected using inductively coupled plasma-mass spectrometry. The range of ex-Mg was within 0.01-1,610 mg kg-1, with a mean of 210.4 mg kg-1. From the tested soil samples, 66% were Mg-deficient (<240 mg kg-1), 32% were Mg-optimal (240-730 mg kg-1) and 2% were Mg-excessive (>730 mg kg-1). Among the ACZ, the Dry zone Low country had the highest ex-Mg concentration (p<0.05). Among the soil orders tested, Vertisols had the highest and Histosols had the lowest ex-Mg concentration (p<0.05). Irrigated rice fields had higher ex-Mg than the rainfed systems (p<0.05). Soil ex-Mg concentration was positively correlated with soil pH (p<0.05) and crop productivity (p<0.05). As most rice-growing soils of Sri Lanka are Mg-deficient, it is important to implement strategies specific to ACZs, soil orders, and water sources to improve the soil-Mg status.
镁(Mg)是植物必需的宏量营养元素。尽管斯里兰卡人以大米为主食,但对斯里兰卡稻田土壤中的镁含量受气候、土壤和水源影响的情况却不甚了解。这项研究的目的是:(i) 确定斯里兰卡低地水稻田中可交换镁(ex-Mg)浓度的分布情况;(ii) 研究农业气候区(ACZs)、土壤顺序和水源对确定斯里兰卡低地水稻田中可交换镁浓度的交互影响。采用分层随机抽样方法,共采集了 9038 个土壤样本,分别代表六个农业气候区、六个土壤等级和三种水源。样品经 0.01 M CaCl2 萃取后,用电感耦合等离子体质谱法检测镁的含量。外镁含量范围为 0.01-1,610 毫克/千克,平均值为 210.4 毫克/千克。在检测的土壤样本中,66%缺镁(730 毫克/千克)。在 ACZ 中,干旱区低地的镁浓度最高(p<0.05)。在所测试的土壤类型中,垂直土壤的前镁浓度最高,而组群土壤的前镁浓度最低(p<0.05)。灌溉稻田的外镁浓度高于雨养系统(p<0.05)。土壤外镁浓度与土壤 pH 值(p<0.05)和作物产量(p<0.05)呈正相关。由于斯里兰卡大多数种植水稻的土壤都缺镁,因此必须针对不同的 ACZ、土壤顺序和水源实施相应的策略,以改善土壤镁含量状况。
{"title":"Distribution of Exchangeable Magnesium in Lowland Rice-Cultivated Soils of Sri Lanka as Affected by the Differences in Climate, Soil, and Water Source","authors":"Indeera Hetti Arachchige, B. Marambe, Mohomad S. Nijamudeen, H. Kadupitiya, Dinaratne Sirisena, R. Chandrajith, L. Suriyagoda","doi":"10.35762/aer.2023027","DOIUrl":"https://doi.org/10.35762/aer.2023027","url":null,"abstract":"Magnesium (Mg) is an essential macronutrient for plants. Even though Sri Lankans consume rice as the staple food, the Mg status in Sri Lankan paddy soils as affected by its climate, soils, and water sources used are not well understood. This study was conducted to (i) determine the distribution of exchangeable Mg (ex-Mg) concentration, and (ii) examine the interactive effects of agro-climatic zones (ACZs), soil order, and water source in determining the ex-Mg concentra-tion in lowland paddy fields of Sri Lanka. A total of 9,038 soil samples representing six ACZs, six soil orders, and three water sources were collected using a stratified random sampling approach. The ex-Mg concentration was determined after extracting in 0.01 M CaCl2 and detected using inductively coupled plasma-mass spectrometry. The range of ex-Mg was within 0.01-1,610 mg kg-1, with a mean of 210.4 mg kg-1. From the tested soil samples, 66% were Mg-deficient (<240 mg kg-1), 32% were Mg-optimal (240-730 mg kg-1) and 2% were Mg-excessive (>730 mg kg-1). Among the ACZ, the Dry zone Low country had the highest ex-Mg concentration (p<0.05). Among the soil orders tested, Vertisols had the highest and Histosols had the lowest ex-Mg concentration (p<0.05). Irrigated rice fields had higher ex-Mg than the rainfed systems (p<0.05). Soil ex-Mg concentration was positively correlated with soil pH (p<0.05) and crop productivity (p<0.05). As most rice-growing soils of Sri Lanka are Mg-deficient, it is important to implement strategies specific to ACZs, soil orders, and water sources to improve the soil-Mg status.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"36 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139154647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Irrigation Techniques on Sustainable Water Management for Rice Cultivation System - A Review 灌溉技术对水稻种植系统可持续水资源管理的影响 - 综述
Q3 Environmental Science Pub Date : 2023-12-20 DOI: 10.35762/aer.2023024
B. Wichaidist, Amornrat Intrman, Songsak Puttrawutichai, Chawakorn Rewtragulpaibul, Supatchaya Chuanpongpanich, Chaisri Suksaroj
Rice serves as a fundamental sustenance for approximately half of the global population, particularly in Asia. Nevertheless, the cultivation of rice demands a substantial water supply, and the challenges associated with water deficits have been exacerbated by irregular rainfall patterns induced by global warming. Consequently, there is a critical need to reassess irrigation techniques to effectively tackle these issues. In this comprehensive review, the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) method was employed to systematically explore literature on irrigation techniques aimed at fostering sustainable water management in rice cultivation systems. The primary components of the framework encompass water consumption and water-related characteristics, soil-related characteristics, and plant-related characteristics, encompassing relevant components and indicators. Two alternative irrigation methods, namely alternate wetting and drying (AWD) and saturated soil irrigation (SSI), have been proposed to enhance water use efficiency (WUE) in rice cultivation compared to traditional continuous flooding (CF). These alternative irrigation methods do not adversely affect rice yield, both quantitatively and qualitatively. Furthermore, these alternative irrigation approaches have the potential to mitigate greenhouse gas (GHG) emissions, particularly methane emissions, in rice production. This review underscores the significance of data on alternate irrigation systems, providing valuable insights for researchers and policymakers in formulating strategies that align at every level for practical implementation. This is crucial as it is relevant to multiple organizations and stakeholders. Moreover, in the face of inclement weather conditions resulting from climate change, the study's findings indicate that research on farmers' adaptation, plant stress, and resilience within the rice cultivation system is still in its nascent stages. This highlights the pressing need for further exploration and advancement in these areas to develop effective strategies for coping with the challenges posed by climate change.
水稻是全球约一半人口的基本食物,尤其是在亚洲。然而,水稻种植需要大量的水供应,而全球变暖导致的不规则降雨模式加剧了缺水带来的挑战。因此,亟需重新评估灌溉技术,以有效解决这些问题。本综述采用了系统综述和元分析首选报告项目(PRISMA)方法,系统地探讨了旨在促进水稻种植系统可持续水资源管理的灌溉技术文献。该框架的主要组成部分包括耗水量和与水相关的特征、与土壤相关的特征以及与植物相关的特征,其中包含相关的组成部分和指标。与传统的连续灌溉(CF)相比,人们提出了两种替代灌溉方法,即交替干湿灌溉(AWD)和饱和土壤灌溉(SSI),以提高水稻种植的用水效率(WUE)。这些替代灌溉方法在数量和质量上都不会对水稻产量产生不利影响。此外,这些替代灌溉方法还有可能减少水稻生产中的温室气体(GHG)排放,尤其是甲烷排放。本综述强调了替代灌溉系统数据的重要性,为研究人员和政策制定者提供了宝贵的见解,帮助他们制定各级战略,以便实际实施。这一点至关重要,因为它与多个组织和利益相关者息息相关。此外,面对气候变化造成的恶劣天气条件,研究结果表明,对水稻种植系统中农民的适应性、植物压力和恢复能力的研究仍处于初级阶段。这突出表明,迫切需要在这些领域进一步探索和推进,以制定应对气候变化挑战的有效战略。
{"title":"The Effect of Irrigation Techniques on Sustainable Water Management for Rice Cultivation System - A Review","authors":"B. Wichaidist, Amornrat Intrman, Songsak Puttrawutichai, Chawakorn Rewtragulpaibul, Supatchaya Chuanpongpanich, Chaisri Suksaroj","doi":"10.35762/aer.2023024","DOIUrl":"https://doi.org/10.35762/aer.2023024","url":null,"abstract":"Rice serves as a fundamental sustenance for approximately half of the global population, particularly in Asia. Nevertheless, the cultivation of rice demands a substantial water supply, and the challenges associated with water deficits have been exacerbated by irregular rainfall patterns induced by global warming. Consequently, there is a critical need to reassess irrigation techniques to effectively tackle these issues. In this comprehensive review, the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) method was employed to systematically explore literature on irrigation techniques aimed at fostering sustainable water management in rice cultivation systems. The primary components of the framework encompass water consumption and water-related characteristics, soil-related characteristics, and plant-related characteristics, encompassing relevant components and indicators. Two alternative irrigation methods, namely alternate wetting and drying (AWD) and saturated soil irrigation (SSI), have been proposed to enhance water use efficiency (WUE) in rice cultivation compared to traditional continuous flooding (CF). These alternative irrigation methods do not adversely affect rice yield, both quantitatively and qualitatively. Furthermore, these alternative irrigation approaches have the potential to mitigate greenhouse gas (GHG) emissions, particularly methane emissions, in rice production. This review underscores the significance of data on alternate irrigation systems, providing valuable insights for researchers and policymakers in formulating strategies that align at every level for practical implementation. This is crucial as it is relevant to multiple organizations and stakeholders. Moreover, in the face of inclement weather conditions resulting from climate change, the study's findings indicate that research on farmers' adaptation, plant stress, and resilience within the rice cultivation system is still in its nascent stages. This highlights the pressing need for further exploration and advancement in these areas to develop effective strategies for coping with the challenges posed by climate change.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"40 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effect of Incubation Time and Drainage pH on the Immobilization of Copper in Post Coal Mine Soil Using Sumatera Brown Coal Char 使用苏门答腊褐煤炭培养时间和排水 pH 值对煤矿后土壤中铜固定化的影响
Q3 Environmental Science Pub Date : 2023-12-14 DOI: 10.35762/aer.2023023
Muhammad Haviz, Damris Muhammad, Maria Vabylita, Miftahul Djana, R. Mayasari, Ashruri Ashruri, Sandri Erfani, Yuli Darni, Opik Taufik Purwadi, Simparmin Br Ginting
Post coal mine (PCM) activities pose significant environmental challenges. Soils affected by PCM often exhibit increased acidity and elevated levels of heavy metals. In the case of Sungai Buluh PCM in the Jambi Province, Indonesia, copper (Cu) levels in the soil reach 94.79 mg kg-1, surpassing the Indonesian standard of 40 mg kg-1. Sumatera brown coal (SBC), typically is not considered as fuel due to its properties, offers a cost-effective solution for Cu immobilization in such soils. In this study, SBC was subjected to pyrolysis at 400°C for 1 h, sieved through a 10-mesh sieve, and characterized using SEM and FTIR. The soil-char mixture consisted of 250 g of soil and 25 g of char (9:1 ratio), while a control group included 250 grams of soil with no char. The soil's pH significantly influenced Cu adsorption by SBC char. Cu immobility by SBC char was highest at pH 5, with an efficiency of 66.67% from pH 1 to 5. Over a 4-week period, the mobility of Cu in soil containing 10% char decreased by 36.36%. Pseudo-first-order kinetics yielded R2 values of 0.750 and 0.979 for 0% and 10% char additions, respectively. To inform future research on SBC char's potential for soil amendment, exploring the properties of SBC char produced at different pyrolysis temperatures is advisable. This information can aid in the development of char furnaces with appropriate technology to efficiently produce large quantities of effective SBC char. Additionally, determining optimal incubation times can help predict the frequency of char application in various regions.
煤矿开采(PCM)后活动给环境带来了重大挑战。受 PCM 影响的土壤往往酸度增加,重金属含量升高。在印度尼西亚占碑省的 Sungai Buluh PCM 案例中,土壤中的铜(Cu)含量达到 94.79 毫克/千克,超过了印度尼西亚 40 毫克/千克的标准。苏门答腊褐煤 (SBC) 因其特性通常不被视为燃料,但它却为固定此类土壤中的铜提供了一种具有成本效益的解决方案。在这项研究中,苏门答腊褐煤在 400°C 高温下热解 1 小时,然后用 10 目筛过筛,并使用扫描电镜和傅立叶变换红外光谱进行表征。土壤-炭混合物包括 250 克土壤和 25 克炭(比例为 9:1),对照组包括 250 克没有炭的土壤。土壤的 pH 值对 SBC 炭的铜吸附有很大影响。在 pH 值为 5 时,SBC 木炭对铜的固定性最高,pH 值为 1 至 5 时的固定效率为 66.67%。在 4 周的时间内,含有 10% 木炭的土壤中铜的迁移率降低了 36.36%。0% 和 10% 木炭添加量的伪一阶动力学 R2 值分别为 0.750 和 0.979。为了给未来有关 SBC 炭对土壤改良潜力的研究提供信息,最好探索一下在不同热解温度下产生的 SBC 炭的特性。这些信息有助于开发具有适当技术的炭化炉,以高效生产大量有效的 SBC 炭。此外,确定最佳培养时间还有助于预测不同地区应用木炭的频率。
{"title":"The Effect of Incubation Time and Drainage pH on the Immobilization of Copper in Post Coal Mine Soil Using Sumatera Brown Coal Char","authors":"Muhammad Haviz, Damris Muhammad, Maria Vabylita, Miftahul Djana, R. Mayasari, Ashruri Ashruri, Sandri Erfani, Yuli Darni, Opik Taufik Purwadi, Simparmin Br Ginting","doi":"10.35762/aer.2023023","DOIUrl":"https://doi.org/10.35762/aer.2023023","url":null,"abstract":"Post coal mine (PCM) activities pose significant environmental challenges. Soils affected by PCM often exhibit increased acidity and elevated levels of heavy metals. In the case of Sungai Buluh PCM in the Jambi Province, Indonesia, copper (Cu) levels in the soil reach 94.79 mg kg-1, surpassing the Indonesian standard of 40 mg kg-1. Sumatera brown coal (SBC), typically is not considered as fuel due to its properties, offers a cost-effective solution for Cu immobilization in such soils. In this study, SBC was subjected to pyrolysis at 400°C for 1 h, sieved through a 10-mesh sieve, and characterized using SEM and FTIR. The soil-char mixture consisted of 250 g of soil and 25 g of char (9:1 ratio), while a control group included 250 grams of soil with no char. The soil's pH significantly influenced Cu adsorption by SBC char. Cu immobility by SBC char was highest at pH 5, with an efficiency of 66.67% from pH 1 to 5. Over a 4-week period, the mobility of Cu in soil containing 10% char decreased by 36.36%. Pseudo-first-order kinetics yielded R2 values of 0.750 and 0.979 for 0% and 10% char additions, respectively. To inform future research on SBC char's potential for soil amendment, exploring the properties of SBC char produced at different pyrolysis temperatures is advisable. This information can aid in the development of char furnaces with appropriate technology to efficiently produce large quantities of effective SBC char. Additionally, determining optimal incubation times can help predict the frequency of char application in various regions.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"94 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139179357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phosphorus Speciation and Heavy Metal Levels in Ogun River Sediments at Different Anthropogenic Locations in Abeokuta, Ogun State 奥贡州阿贝奥库塔不同人为地点奥贡河沉积物中磷的种类和重金属含量
Q3 Environmental Science Pub Date : 2023-12-06 DOI: 10.35762/aer.2023022
Olayinka Oluwafunmilayo Olasunbo, Opatoyinbo Oluwabamise Esther, Olujimi Olarenwaju Olusoji, Azeez Jamiu Oladipupo, Oyebanji Adedayo Olamide
Phosphorus (P) is an essential nutrient for phytoplankton growth in water bodies and an important element in biochemical processes. Also, excessive P in river causes eutrophication which endangers aquatic organisms while sediment acts as sink for inorganic and organic pollutants and nutrients. To assess the availability of P and heavy metals (HMs) in Ogun River, surface sediment samples were collected at twelve anthropogenic sites for three months. The surface sediment samples were sequentially extracted to determine five phosphorus fractions [loosely-sorbed P (LS-P), iron-bound P (Fe-P), authigenic apatite, biogenic apatite and CaCO3-bound P (CFA-P), detrital apatite (Det-P) and other inorganic P (IP) as well as organic P (OP)] and levels of selected HMs (Pb, Cr and Zn). Phosphorus fractions were determined spectrophotometrically and HMs were determined using atomic absorption spectrophotometer (AAS) after wet digestion. The average percentages of fractions of P in surface sediments were Det-P (34.66±1.00%) > Fe-P (27.67± 0.02%) > OP (18.11±2.00%) > authigenic apatite, biogenic apatite and CaCO3-bound P (14.38±4.56%) > LS-P (5.18±0.78%). It was observed that IP was dominant (86.38%) of the total phosphorus (TP) compared to OP (13.62%). One of the sites, Garri processing, had highest TP (710 µg P g-1) which was above the standard values for Chinese Environmental Dredging (500 µg P g-1) and Canadian Province of Ontario (600 µg P g-1) Sediment Quality Guidelines (SQG). The mean concentrations of HMs determined in sediments were below the SQG values except Zn in some sites. The results revealed moderate pollution of P and Zn and also, accumulation of these pollutants overtime might pose threat to aquatic organisms. The results obtained would serve as baseline values for P speciation in Ogun River.
磷是水体中浮游植物生长所必需的营养物质,也是生物化学过程中的重要元素。此外,河流中磷含量过高会导致富营养化,危及水生生物,而沉积物则是无机和有机污染物和营养物质的汇。为了评估奥根河中磷和重金属的有效性,在12个人为地点采集了3个月的表层沉积物样本。依次提取表层沉积物样品,测定5种磷组分[松散吸附磷(LS-P)、铁结合磷(Fe-P)、自生磷灰石、生物磷灰石和caco3结合磷(CFA-P)、碎屑磷灰石(dt -P)和其他无机磷(IP)和有机磷(OP)]以及选定的HMs (Pb、Cr和Zn)水平。湿消化后用原子吸收分光光度法测定磷组分,用原子吸收分光光度法测定质谱。表层沉积物中磷组分的平均百分比为:Det-P(34.66±1.00%)> Fe-P(27.67±0.02%)> OP(18.11±2.00%)>自生磷灰石、生物磷灰石和caco3结合磷(14.38±4.56%)> LS-P(5.18±0.78%)。总磷(TP)中,IP占86.38%,OP占13.62%。其中Garri加工的总磷最高(710µg P -1),高于中国环境疏浚(500µg P -1)和加拿大安大略省沉积物质量指南(600µg P -1)的标准值。除Zn外,沉积物中HMs的平均浓度均低于SQG值。结果表明,水体中磷、锌的污染程度适中,且随着时间的推移,这些污染物的积累可能对水生生物造成威胁。所得结果可作为奥根河磷形态形成的基线值。
{"title":"Phosphorus Speciation and Heavy Metal Levels in Ogun River Sediments at Different Anthropogenic Locations in Abeokuta, Ogun State","authors":"Olayinka Oluwafunmilayo Olasunbo, Opatoyinbo Oluwabamise Esther, Olujimi Olarenwaju Olusoji, Azeez Jamiu Oladipupo, Oyebanji Adedayo Olamide","doi":"10.35762/aer.2023022","DOIUrl":"https://doi.org/10.35762/aer.2023022","url":null,"abstract":"Phosphorus (P) is an essential nutrient for phytoplankton growth in water bodies and an important element in biochemical processes. Also, excessive P in river causes eutrophication which endangers aquatic organisms while sediment acts as sink for inorganic and organic pollutants and nutrients. To assess the availability of P and heavy metals (HMs) in Ogun River, surface sediment samples were collected at twelve anthropogenic sites for three months. The surface sediment samples were sequentially extracted to determine five phosphorus fractions [loosely-sorbed P (LS-P), iron-bound P (Fe-P), authigenic apatite, biogenic apatite and CaCO3-bound P (CFA-P), detrital apatite (Det-P) and other inorganic P (IP) as well as organic P (OP)] and levels of selected HMs (Pb, Cr and Zn). Phosphorus fractions were determined spectrophotometrically and HMs were determined using atomic absorption spectrophotometer (AAS) after wet digestion. The average percentages of fractions of P in surface sediments were Det-P (34.66±1.00%) > Fe-P (27.67± 0.02%) > OP (18.11±2.00%) > authigenic apatite, biogenic apatite and CaCO3-bound P (14.38±4.56%) > LS-P (5.18±0.78%). It was observed that IP was dominant (86.38%) of the total phosphorus (TP) compared to OP (13.62%). One of the sites, Garri processing, had highest TP (710 µg P g-1) which was above the standard values for Chinese Environmental Dredging (500 µg P g-1) and Canadian Province of Ontario (600 µg P g-1) Sediment Quality Guidelines (SQG). The mean concentrations of HMs determined in sediments were below the SQG values except Zn in some sites. The results revealed moderate pollution of P and Zn and also, accumulation of these pollutants overtime might pose threat to aquatic organisms. The results obtained would serve as baseline values for P speciation in Ogun River.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"50 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138595153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the Compliance of a Coastal Municipality to the Ecological Solid Waste Management Act of 2000 (RA 9003) 评估沿海城市对 2000 年《生态固体废物管理法》(RA 9003)的遵守情况
Q3 Environmental Science Pub Date : 2023-12-01 DOI: 10.35762/aer.2023021
Michelle M. Del Rosario
To bring about a significant change in the SWM situation in the Philippines, the Ecological Solid Waste Management Act of 2000 (RA 9003) was enacted to provide local government units with frameworks that would help them solve the looming garbage problem in the country. Despite the presence of the decree, managing wastes remains a problem in the country particularly in the CALABARZON. This study was conducted to assess the extent of compliance of a coastal municipality to RA 9003 in terms of institutional mechanism, comprehensive solid waste management, incentives, and financial solid waste management and compare the assessments of 72 public officials, 396 residents, and 126 business establishments regarding the local government units’ compliance. The research utilized a descriptive design and gathered data using the questionnaire complemented with interview and focus group discussion. Frequency, weighted mean, standard deviation, ANOVA and Scheffe’s Test were used in treating the gathered data. Results revealed that Calaca has not fully complied with RA 9003. The solid waste management (SWM) implementation in the component barangays and waste segregation are not strictly monitored. There is weak enforcement of waste segregation, provision of appropriate bins, technical capacity of waste handlers, and utilization of the materials recovery facilities. Waste collection remains the primary issue in the city. The assessments of the officials, residents, and establishments regarding Calaca’s compliance with institutional mechanisms, financial SWM, and incentives significantly differed despite their agreement regarding comprehensive SWM, indicating a low level of awareness among stakeholders and a weak SWM system.
为了使菲律宾的SWM情况发生重大变化,颁布了《2000年生态固体废物管理法》(RA 9003),为地方政府单位提供框架,帮助他们解决该国迫在眉睫的垃圾问题。尽管颁布了这项法令,但废物管理仍然是该国的一个问题,特别是在卡拉巴松。本研究旨在评估一个沿海城市在体制机制、固体废物综合管理、激励措施和固体废物财务管理方面对RA 9003的遵守程度,并比较72名政府官员、396名居民和126家商业机构对地方政府单位遵守情况的评估。本研究采用描述性设计,并采用问卷调查与访谈和焦点小组讨论相结合的方式收集数据。使用频率、加权平均值、标准差、方差分析和Scheffe’s检验对收集到的数据进行处理。结果显示Calaca没有完全符合RA 9003的要求。各组成村的固体废物管理实施和废物分类没有得到严格监控。在废物分类、提供适当的垃圾箱、废物处理人员的技术能力和材料回收设施的利用方面执行不力。垃圾收集仍然是这个城市的首要问题。尽管官员、居民和机构在全面的主权财富管理方面意见一致,但他们对Calaca对体制机制、金融主权财富管理和激励措施的遵守程度的评估存在显著差异,这表明利益相关者的意识水平较低,主权财富管理体系薄弱。
{"title":"Assessing the Compliance of a Coastal Municipality to the Ecological Solid Waste Management Act of 2000 (RA 9003)","authors":"Michelle M. Del Rosario","doi":"10.35762/aer.2023021","DOIUrl":"https://doi.org/10.35762/aer.2023021","url":null,"abstract":"To bring about a significant change in the SWM situation in the Philippines, the Ecological Solid Waste Management Act of 2000 (RA 9003) was enacted to provide local government units with frameworks that would help them solve the looming garbage problem in the country. Despite the presence of the decree, managing wastes remains a problem in the country particularly in the CALABARZON. This study was conducted to assess the extent of compliance of a coastal municipality to RA 9003 in terms of institutional mechanism, comprehensive solid waste management, incentives, and financial solid waste management and compare the assessments of 72 public officials, 396 residents, and 126 business establishments regarding the local government units’ compliance. The research utilized a descriptive design and gathered data using the questionnaire complemented with interview and focus group discussion. Frequency, weighted mean, standard deviation, ANOVA and Scheffe’s Test were used in treating the gathered data. Results revealed that Calaca has not fully complied with RA 9003. The solid waste management (SWM) implementation in the component barangays and waste segregation are not strictly monitored. There is weak enforcement of waste segregation, provision of appropriate bins, technical capacity of waste handlers, and utilization of the materials recovery facilities. Waste collection remains the primary issue in the city. The assessments of the officials, residents, and establishments regarding Calaca’s compliance with institutional mechanisms, financial SWM, and incentives significantly differed despite their agreement regarding comprehensive SWM, indicating a low level of awareness among stakeholders and a weak SWM system.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138627285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Role of Bacteria and Factors Affecting the Biodegradation of Pollutants in the Biofilter Reactor: A Review 生物过滤反应器中细菌的作用及影响污染物生物降解的因素综述
Q3 Environmental Science Pub Date : 2023-10-24 DOI: 10.35762/aer.2023020
Muliyadi Muliyadi, Purwanto Purwanto, Sri Sumiyati, Sudarno Sudarno, Budiyono Budiyono, Budi Warsito, Hadiyanto Hadiyanto
The findings showed that several types of bacteria can help biodegrade organic pollutants, such as Comamonadacea, which can biodegrade volatile fatty acids and aromatic compounds. Proteobacteria, Bacteroidetes, and Actinobacteria can biodegrade ammonium. Burkholderiales can biodegrade ferric ions and hydrogen. Comamonas testosteroni is able to biodegrade nitrates. Pseudomonas taiwanensis, Acinetobacter guillouiae, and Klebsiella pneumoniae can reduce copper, chromium and zinc levels. Azolla biomass reduces strontium. Rhodospirillum sp. can biodegrade cadmium, mercury, lead, and nickel. Gallionella ferruginea and Leptothrix sp. can biodegrade arsenic and manganese. Gracilaria sp. can biodegrade aluminum, chromium, and zinc. Desulfovibrio sp. can biodegrade copper, zinc, nickel, iron, and arsenic. Thiomonas sp. can biodegrade arsenic and iron. Thauera selenatis can biodegrade copper, zinc, cadmium, nickel, lead, cobalt, chromium, and mercury. Thiobacillus thiooxidans can degrade both zinc and copper. Sargassum filipendula biodegrades copper and nickel. Meanwhile, in the findings of the factors that affected biofiltration, it was identified that there were four that played a significant role such as temperature, dissolved oxygen, hydraulic retention time, organic loading rate, biological organisms, and supply nutrients. In conclusion, several types of bacteria grow and help biodegrade in biofilter reactors. This is inseparable from the supporting factors that increase the efficiency of pollutant reduction in biofilter reactors.
研究结果表明,几种类型的细菌可以帮助生物降解有机污染物,例如共聚物,它可以生物降解挥发性脂肪酸和芳香族化合物。变形菌门、拟杆菌门和放线菌门可以生物降解铵。Burkholderiales可以生物降解铁离子和氢。睾酮单胞菌能够生物降解硝酸盐。台湾假单胞菌、吉鲁不动杆菌和肺炎克雷伯菌可以降低铜、铬和锌的含量。杜鹃花生物量降低锶。红螺旋藻可以生物降解镉、汞、铅和镍。铁Gallionella ferruginea和细螺旋体可以生物降解砷和锰。江蓠可以生物降解铝、铬和锌。Desulfovibrio sp.可以生物降解铜、锌、镍、铁和砷。硫单胞菌可以生物降解砷和铁。硒酸梭菌可以生物降解铜、锌、镉、镍、铅、钴、铬和汞。硫氧化硫杆菌可以降解锌和铜。马尾藻生物降解铜和镍。同时,在影响生物过滤的因素中,发现温度、溶解氧、水力滞留时间、有机负载率、生物有机体和供给营养物等4个因素对生物过滤的影响显著。总之,几种类型的细菌在生物过滤反应器中生长并帮助生物降解。这与提高生物滤池减污效率的配套因素是分不开的。
{"title":"The Role of Bacteria and Factors Affecting the Biodegradation of Pollutants in the Biofilter Reactor: A Review","authors":"Muliyadi Muliyadi, Purwanto Purwanto, Sri Sumiyati, Sudarno Sudarno, Budiyono Budiyono, Budi Warsito, Hadiyanto Hadiyanto","doi":"10.35762/aer.2023020","DOIUrl":"https://doi.org/10.35762/aer.2023020","url":null,"abstract":"The findings showed that several types of bacteria can help biodegrade organic pollutants, such as Comamonadacea, which can biodegrade volatile fatty acids and aromatic compounds. Proteobacteria, Bacteroidetes, and Actinobacteria can biodegrade ammonium. Burkholderiales can biodegrade ferric ions and hydrogen. Comamonas testosteroni is able to biodegrade nitrates. Pseudomonas taiwanensis, Acinetobacter guillouiae, and Klebsiella pneumoniae can reduce copper, chromium and zinc levels. Azolla biomass reduces strontium. Rhodospirillum sp. can biodegrade cadmium, mercury, lead, and nickel. Gallionella ferruginea and Leptothrix sp. can biodegrade arsenic and manganese. Gracilaria sp. can biodegrade aluminum, chromium, and zinc. Desulfovibrio sp. can biodegrade copper, zinc, nickel, iron, and arsenic. Thiomonas sp. can biodegrade arsenic and iron. Thauera selenatis can biodegrade copper, zinc, cadmium, nickel, lead, cobalt, chromium, and mercury. Thiobacillus thiooxidans can degrade both zinc and copper. Sargassum filipendula biodegrades copper and nickel. Meanwhile, in the findings of the factors that affected biofiltration, it was identified that there were four that played a significant role such as temperature, dissolved oxygen, hydraulic retention time, organic loading rate, biological organisms, and supply nutrients. In conclusion, several types of bacteria grow and help biodegrade in biofilter reactors. This is inseparable from the supporting factors that increase the efficiency of pollutant reduction in biofilter reactors.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"10 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135265785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of E-waste Generation through G-PESTLE Analysis in the City of Zamboanga, Philippines: Basis for Management Strategies 通过G-PESTLE分析评估菲律宾三宝颜市的电子垃圾产生:管理策略的基础
Q3 Environmental Science Pub Date : 2023-10-12 DOI: 10.35762/aer.2023019
Mary Ann Beth L. Kong, Edwin R. de los Reyes, Francis Dave C. Siacor
Due to a growth in the production of electronic waste (e-waste), the Philippines, particularly Zamboanga City, a top-tier, highly urbanized city on the Zamboanga Peninsula, is coping with an e-waste problem. Understanding the outside forces influencing e-waste management is necessary for creating effective strategies. With the help of a G-PESTLE analysis (geographical, political, economic, social, technical, legal, and environmental) and recommendations for improvement, this study assessed the city's existing e-waste management situation. The study looks at possibilities and problems, then offers management tactics based on the results. The study employed a hybrid methodology. Using the G-PESTLE analysis framework, the external factors affecting the management of e-waste were looked into. This procedure included focus groups, key informant interviews, and literature studies. To direct the analysis process, a framework for the research design was established with particular questions. The findings and discussions highlight the need for specific legislation, educational initiatives, technology advancements, and monetary incentives to solve e-waste concerns successfully. This study aims to provide focused management plans and actions that will enhance Zamboanga City's sustainable lifestyles and decrease the harmful effects of e-waste on the environment. The research applications of this study include informing future e-waste management research and initiatives, assisting stakeholders and policymakers in creating efficient policies and programs, and enhancing e-waste management practices in Zamboanga City. The results offer insightful information and a basis for promoting sustainable development, minimizing environmental impact, and implementing effective e-waste management strategies.
由于电子垃圾(e-waste)产生的增长,菲律宾,特别是三宝颜市,一个顶级的,高度城市化的城市在三宝颜半岛,正在应对电子垃圾问题。了解影响电子废物管理的外部力量对于制定有效的策略是必要的。在G-PESTLE分析(地理、政治、经济、社会、技术、法律和环境)和改进建议的帮助下,本研究评估了该市现有的电子废物管理状况。该研究着眼于可能性和问题,然后根据结果提供管理策略。这项研究采用了一种混合方法。利用G-PESTLE分析框架,探讨了影响电子垃圾管理的外部因素。该程序包括焦点小组、关键信息提供者访谈和文献研究。为了指导分析过程,建立了一个带有特定问题的研究设计框架。调查结果和讨论强调需要具体的立法、教育举措、技术进步和金钱激励来成功解决电子废物问题。本研究旨在提供重点管理计划和行动,以加强三宝颜市的可持续生活方式,减少电子垃圾对环境的有害影响。本研究的研究应用包括为未来的电子废物管理研究和倡议提供信息,协助利益相关者和政策制定者制定有效的政策和计划,以及加强三宝颜市的电子废物管理实践。研究结果为促进可持续发展、减少环境影响和实施有效的电子废物管理策略提供了有见地的信息和基础。
{"title":"Evaluation of E-waste Generation through G-PESTLE Analysis in the City of Zamboanga, Philippines: Basis for Management Strategies","authors":"Mary Ann Beth L. Kong, Edwin R. de los Reyes, Francis Dave C. Siacor","doi":"10.35762/aer.2023019","DOIUrl":"https://doi.org/10.35762/aer.2023019","url":null,"abstract":"Due to a growth in the production of electronic waste (e-waste), the Philippines, particularly Zamboanga City, a top-tier, highly urbanized city on the Zamboanga Peninsula, is coping with an e-waste problem. Understanding the outside forces influencing e-waste management is necessary for creating effective strategies. With the help of a G-PESTLE analysis (geographical, political, economic, social, technical, legal, and environmental) and recommendations for improvement, this study assessed the city's existing e-waste management situation. The study looks at possibilities and problems, then offers management tactics based on the results. The study employed a hybrid methodology. Using the G-PESTLE analysis framework, the external factors affecting the management of e-waste were looked into. This procedure included focus groups, key informant interviews, and literature studies. To direct the analysis process, a framework for the research design was established with particular questions. The findings and discussions highlight the need for specific legislation, educational initiatives, technology advancements, and monetary incentives to solve e-waste concerns successfully. This study aims to provide focused management plans and actions that will enhance Zamboanga City's sustainable lifestyles and decrease the harmful effects of e-waste on the environment. The research applications of this study include informing future e-waste management research and initiatives, assisting stakeholders and policymakers in creating efficient policies and programs, and enhancing e-waste management practices in Zamboanga City. The results offer insightful information and a basis for promoting sustainable development, minimizing environmental impact, and implementing effective e-waste management strategies.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135923773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Fe3O4/thiamine Magnetic Particles in the Removal of Methylene Blue Fe3O4/硫胺素磁性颗粒在去除亚甲基蓝中的应用
Q3 Environmental Science Pub Date : 2023-10-06 DOI: 10.35762/aer.2023018
Phuong Lan Tran-Nguyen, Suong Mai-Thi-Thu, Thanh-Ty Nguyen, Kim-Phung Ly, Tran Thi Bich Quyen, Shella Permatasari Santoso, Nguyen-Phuong-Dung Tran, Nguyen Minh Nhut
Fe3O4/thiamine particles were prepared in this work via precipitation method. The synthesis method is based on the principle of precipitation of Fe3O4 particles in the presence of thiamine coating agent. Also, the potential application of Fe3O4/ thiamine in the removal of methylene blue (MB) was investigated. Several factors that affect the synthesis of Fe3O4/thiamine such as base concentration, mass ratio of FeCl2 to thiamine, reaction temperature, and reaction time were determined. Optimal conditions for preparing Fe3O4/thiamine are NH4OH concentration = 10%, mass ratio of FeCl2:thiamine = 5:1 (g g-1), reaction temperature = 30 °C, reaction time = 120 min. The average particle size of Fe3O4/thiamine is 293.7 nm while the specific surface area, pore diameter, and magnetization of the obtained Fe3O4/ thiamine particles are 57 m2 g-1, 192.67 Å, and 2.4 emu g-1, respectively. The interesting point of this work is to obtain the Fe3O4/thiamine at low temperature with less amount of NH4OH used. Furthermore, 79.08% of MB could be removed using Fe3O4/thiamine as an adsorbent, with a maximum adsorption capacity of 31.63 mg g-1 at pH of 10, a MB concentration of 50 mg L-1, and an adsorption time of 15 min. Adsorption kinetics studies showed that the pseudo-second-order model fitted the experimental data better than the pseudo-first-order and the adsorption process is physical adsorption following the Freundlich adsorption isotherm model. An adsorption mechanism of MB onto Fe3O4/thiamine was also suggested. The synthesized Fe3O4/ thiamine particles could be a potential material for treating wastewater.
本文采用沉淀法制备了Fe3O4/硫胺素颗粒。该合成方法是基于硫胺素包衣剂存在下Fe3O4颗粒沉淀的原理。并对Fe3O4/硫胺素在亚甲基蓝(MB)脱除中的潜在应用进行了研究。测定了碱浓度、FeCl2与硫胺素的质量比、反应温度和反应时间等因素对Fe3O4/硫胺素合成的影响。制备Fe3O4/硫胺素的最佳工艺条件为:NH4OH浓度为10%,FeCl2与硫胺素的质量比为5:1 (g -1),反应温度为30℃,反应时间为120 min。所得Fe3O4/硫胺素的平均粒径为293.7 nm,比表面积为57 m2 g-1,孔径为192.67 Å,磁化强度为2.4 emu g-1。本工作的有趣之处在于在低温下以较少的NH4OH用量获得Fe3O4/硫胺素。在pH = 10、MB浓度为50 mg L-1、吸附时间为15 min的条件下,Fe3O4/硫胺素对MB的去除率为79.08%,最大吸附量为31.63 mg g-1。吸附动力学研究表明,拟二级吸附模型比拟一级吸附模型更符合实验数据,吸附过程遵循Freundlich吸附等温线模型,为物理吸附过程。并提出了MB在Fe3O4/硫胺素上的吸附机理。合成的Fe3O4/硫胺素颗粒是一种有潜力的废水处理材料。
{"title":"Application of Fe3O4/thiamine Magnetic Particles in the Removal of Methylene Blue","authors":"Phuong Lan Tran-Nguyen, Suong Mai-Thi-Thu, Thanh-Ty Nguyen, Kim-Phung Ly, Tran Thi Bich Quyen, Shella Permatasari Santoso, Nguyen-Phuong-Dung Tran, Nguyen Minh Nhut","doi":"10.35762/aer.2023018","DOIUrl":"https://doi.org/10.35762/aer.2023018","url":null,"abstract":"Fe3O4/thiamine particles were prepared in this work via precipitation method. The synthesis method is based on the principle of precipitation of Fe3O4 particles in the presence of thiamine coating agent. Also, the potential application of Fe3O4/ thiamine in the removal of methylene blue (MB) was investigated. Several factors that affect the synthesis of Fe3O4/thiamine such as base concentration, mass ratio of FeCl2 to thiamine, reaction temperature, and reaction time were determined. Optimal conditions for preparing Fe3O4/thiamine are NH4OH concentration = 10%, mass ratio of FeCl2:thiamine = 5:1 (g g-1), reaction temperature = 30 °C, reaction time = 120 min. The average particle size of Fe3O4/thiamine is 293.7 nm while the specific surface area, pore diameter, and magnetization of the obtained Fe3O4/ thiamine particles are 57 m2 g-1, 192.67 Å, and 2.4 emu g-1, respectively. The interesting point of this work is to obtain the Fe3O4/thiamine at low temperature with less amount of NH4OH used. Furthermore, 79.08% of MB could be removed using Fe3O4/thiamine as an adsorbent, with a maximum adsorption capacity of 31.63 mg g-1 at pH of 10, a MB concentration of 50 mg L-1, and an adsorption time of 15 min. Adsorption kinetics studies showed that the pseudo-second-order model fitted the experimental data better than the pseudo-first-order and the adsorption process is physical adsorption following the Freundlich adsorption isotherm model. An adsorption mechanism of MB onto Fe3O4/thiamine was also suggested. The synthesized Fe3O4/ thiamine particles could be a potential material for treating wastewater.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"300 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134945197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effects of the Preparation Factors on the Properties of CO2 Capture Sorbent Derived from Local Waste Eggshell 制备因素对本地废蛋壳制备CO2捕集剂性能的影响
Q3 Environmental Science Pub Date : 2023-09-28 DOI: 10.35762/aer.2023017
Janjeera Chuanchob, Pornpote Piumsomboon, Benjapon Chalermsinsuwan, Saowaluck Chanchairoek
In this study, the CaO adsorbent was prepared by using local waste eggshell as a raw material. The influence of preparation parameters including calcination temperature, calcination time and particle size of eggshell powder on the adsorption surface area were investigated. By means of statistically experiment design, the interesting parameters were investigated by a full 23 factorial design. The prepared sorbent material was characterized by X–ray diffraction (XRD), Scanning electron microscopy (SEM) and the Brunauer–Emmet–Teller (BET). The results showed the particle size of eggshell powder greatly affected the BET surface area. By applying the prepared condition of 149 μm in particle size, 6 h of calcination time and 1,000oC calcination temperature, the obtained CaO adsorbent yielded the highest in BET surface area of 5.023 m2 g-1. The CO2 performance test in the fluidized bed reactor with 12% V/V CO2 in N2 balance also revealed that the local waste eggshell can be used as CO2 adsorbent. The CO2 carrying capacity of the highest BET surface area sorbent was 0.011 g CO2 g-1 sorbent at 700°C carbonation temperature.
本研究以当地废蛋壳为原料,制备了CaO吸附剂。考察了煅烧温度、煅烧时间、蛋壳粉粒度等制备参数对吸附表面积的影响。采用统计试验设计,采用全23因子设计对感兴趣的参数进行调查。采用x射线衍射(XRD)、扫描电镜(SEM)和bruauer - emmet - teller (BET)对所制备的吸附材料进行了表征。结果表明,蛋壳粉的粒径对BET表面积有较大影响。在粒径为149 μm、煅烧时间为6 h、煅烧温度为1000℃的条件下,得到的CaO吸附剂的BET比表面积最高,为5.023 m2 g-1。在N2平衡浓度为12% V/V的流化床反应器中进行的CO2性能试验也表明,局部废蛋壳可以作为CO2吸附剂。在700℃碳化温度下,BET表面积最大的吸附剂CO2携气量为0.011 g CO2 g-1。
{"title":"The Effects of the Preparation Factors on the Properties of CO2 Capture Sorbent Derived from Local Waste Eggshell","authors":"Janjeera Chuanchob, Pornpote Piumsomboon, Benjapon Chalermsinsuwan, Saowaluck Chanchairoek","doi":"10.35762/aer.2023017","DOIUrl":"https://doi.org/10.35762/aer.2023017","url":null,"abstract":"In this study, the CaO adsorbent was prepared by using local waste eggshell as a raw material. The influence of preparation parameters including calcination temperature, calcination time and particle size of eggshell powder on the adsorption surface area were investigated. By means of statistically experiment design, the interesting parameters were investigated by a full 23 factorial design. The prepared sorbent material was characterized by X–ray diffraction (XRD), Scanning electron microscopy (SEM) and the Brunauer–Emmet–Teller (BET). The results showed the particle size of eggshell powder greatly affected the BET surface area. By applying the prepared condition of 149 μm in particle size, 6 h of calcination time and 1,000oC calcination temperature, the obtained CaO adsorbent yielded the highest in BET surface area of 5.023 m2 g-1. The CO2 performance test in the fluidized bed reactor with 12% V/V CO2 in N2 balance also revealed that the local waste eggshell can be used as CO2 adsorbent. The CO2 carrying capacity of the highest BET surface area sorbent was 0.011 g CO2 g-1 sorbent at 700°C carbonation temperature.","PeriodicalId":36747,"journal":{"name":"Applied Environmental Research","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135343353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Applied Environmental Research
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1