The present study involves the analysis of thirteen physiochemical parameters (pH, temperature, electrical conductivity, total dissolved solids, turbidity, alkalinity, hardness, calcium, magnesium, dissolved oxygen, biological oxygen demand, sulphate and nitrate) and five heavy metals (chromium, zinc, arsenic, lead and cadmium) from Chenab River and its tributaries (Neeru and Bichleri) at Ramban and Doda district, J&K. The analysis was done for two different seasons i.e. summer (June) and winter (December), 2022. The current investigation indicated that all the physiochemical parameters were in the permissible limit in both the seasons except few parameters (Ca, Mg, turbidity). In the analysis of heavy metals in both the seasons, it was found that there was no heavy metal contamination in all sampling sites except the Cr concentration which was found to be higher in all sites (except SXII) in summer season. The detailed analysis involved the calculation of various water quality indices which graded water quality under ‘good’ category as per WQI value whereas CPI and HPI value showed moderate to high pollution level in water during summer season. The study showed the seasonal variation in water quality parameters and thus encourage the need for regular monitoring of water quality to reduce pollution level.
{"title":"Assessing seasonal changes in water quality using various indices in Chenab River and its tributaries (J&K)","authors":"Komal Sharma, Somalya Dogra, Navdeep Singh","doi":"10.1680/jenes.23.00111","DOIUrl":"https://doi.org/10.1680/jenes.23.00111","url":null,"abstract":"The present study involves the analysis of thirteen physiochemical parameters (pH, temperature, electrical conductivity, total dissolved solids, turbidity, alkalinity, hardness, calcium, magnesium, dissolved oxygen, biological oxygen demand, sulphate and nitrate) and five heavy metals (chromium, zinc, arsenic, lead and cadmium) from Chenab River and its tributaries (Neeru and Bichleri) at Ramban and Doda district, J&K. The analysis was done for two different seasons i.e. summer (June) and winter (December), 2022. The current investigation indicated that all the physiochemical parameters were in the permissible limit in both the seasons except few parameters (Ca, Mg, turbidity). In the analysis of heavy metals in both the seasons, it was found that there was no heavy metal contamination in all sampling sites except the Cr concentration which was found to be higher in all sites (except SXII) in summer season. The detailed analysis involved the calculation of various water quality indices which graded water quality under ‘good’ category as per WQI value whereas CPI and HPI value showed moderate to high pollution level in water during summer season. The study showed the seasonal variation in water quality parameters and thus encourage the need for regular monitoring of water quality to reduce pollution level.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356815","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}
The present study was conducted to determine magnetic susceptibility and its correlation with concentration of selected heavy metals including arsenic, chromium, cadmium and lead as well as physicochemical properties of topsoil samples collected from a District 5 of Tehran Municipality, Iran. The specimens were collected from 13 stations (0 to 10 cm depth) along with recording the location of the sampling points through the Global Positioning System, and then were analyzed for physicochemical properties, heavy metal concentration (by Atomic absorption spectrometry) and in-situ magnetic susceptibility at low frequency (χlf, by Bartington MS2 Dual Frequency Sensor). According to the results, the highest and lowest χlf values were 34.1 and 16.3 (10−8 m3kg−1) at Stations 3 (Azadi Bus Station) and 11 (Jannatabad neighborhood), respectively. A significant correlation was found between χlf and the concentration of lead and chromium (P<0.05). Moreover, there was a positive and significant correlation between χlf and the soil organic matter in the study area (P<0.01). Based on the research findings, the magnetic susceptibility measure can be used to quickly evaluate the level of soil contamination with heavy metals and also to monitor the changes of soil organic matter.
{"title":"Correlation of soil magnetic susceptibility with heavy metals and physicochemical profile","authors":"Farnaz Ghobadi, Shahrzad Khoramnejadian, Sadredin Alipour","doi":"10.1680/jenes.24.00004","DOIUrl":"https://doi.org/10.1680/jenes.24.00004","url":null,"abstract":"The present study was conducted to determine magnetic susceptibility and its correlation with concentration of selected heavy metals including arsenic, chromium, cadmium and lead as well as physicochemical properties of topsoil samples collected from a District 5 of Tehran Municipality, Iran. The specimens were collected from 13 stations (0 to 10 cm depth) along with recording the location of the sampling points through the Global Positioning System, and then were analyzed for physicochemical properties, heavy metal concentration (by Atomic absorption spectrometry) and in-situ magnetic susceptibility at low frequency (χlf, by Bartington MS2 Dual Frequency Sensor). According to the results, the highest and lowest χlf values were 34.1 and 16.3 (10−8 m3kg−1) at Stations 3 (Azadi Bus Station) and 11 (Jannatabad neighborhood), respectively. A significant correlation was found between χlf and the concentration of lead and chromium (P<0.05). Moreover, there was a positive and significant correlation between χlf and the soil organic matter in the study area (P<0.01). Based on the research findings, the magnetic susceptibility measure can be used to quickly evaluate the level of soil contamination with heavy metals and also to monitor the changes of soil organic matter.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140445156","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}
Lamyae Mardi, Youssef Fahoul, E. Iboustaten, Z. Bencheqroun, Mohamed Belghiti, K. Tanji, Imane El Mrabet, A. Kherbeche
Dye pollution represents an important portion of the pollutants in industrial wastewater. Sediment from the Sebou River was utilized in this investigation to adsorb malachite green in aqueous solution. The optimization of parameters associated with adsorption was achieved by conducting batch adsorption studies and utilizing the response surface approach. The adsorption process was accurately described by both the Langmuir isotherm model and the pseudo-second-order kinetic model, and the maximum capacity for adsorption was determined to be 5.98 mg g−1. In addition, the adsorption rate was effectively determined by intraparticle diffusion. The thermodynamic parameters determined in the study revealed that the adsorption of MG dye by sediment was unspontaneous and endothermic in nature. In three cycles, the regeneration of sediment following adsorption was confirmed. The adsorption process of MG dye onto sediment was found to be driven by two types of interactions - electrostatic and H-bonding. These results indicate that sediment has the potential to be an effective adsorbent for removing dyestuffs from contaminated industrial effluent. Moreover, the ready availability of sediment in the area further enhances its suitability for this purpose.
染料污染是工业废水中污染物的重要组成部分。本研究利用塞布河的沉积物来吸附水溶液中的孔雀石绿。通过进行批量吸附研究并利用响应面法，实现了吸附相关参数的优化。朗缪尔等温线模型和假二阶动力学模型都准确地描述了吸附过程，并确定了最大吸附容量为 5.98 mg g-1。此外，吸附速率是通过颗粒内扩散有效确定的。研究中测定的热力学参数表明，沉积物对 MG 染料的吸附是非自发的，具有内热性质。在三个循环中，证实了吸附后沉积物的再生。研究发现，MG 染料在沉积物上的吸附过程是由静电和 H 键两种相互作用驱动的。这些结果表明，沉积物有可能成为从受污染的工业废水中去除染料的有效吸附剂。此外，该地区可随时获得沉积物，这进一步提高了沉积物的适用性。
{"title":"Insight into adsorption mechanism, modeling, and desirability function of malachite green by sediment of Oued Sebou (Morocco): Box-Behnken design application","authors":"Lamyae Mardi, Youssef Fahoul, E. Iboustaten, Z. Bencheqroun, Mohamed Belghiti, K. Tanji, Imane El Mrabet, A. Kherbeche","doi":"10.1680/jenes.23.00107","DOIUrl":"https://doi.org/10.1680/jenes.23.00107","url":null,"abstract":"Dye pollution represents an important portion of the pollutants in industrial wastewater. Sediment from the Sebou River was utilized in this investigation to adsorb malachite green in aqueous solution. The optimization of parameters associated with adsorption was achieved by conducting batch adsorption studies and utilizing the response surface approach. The adsorption process was accurately described by both the Langmuir isotherm model and the pseudo-second-order kinetic model, and the maximum capacity for adsorption was determined to be 5.98 mg g−1. In addition, the adsorption rate was effectively determined by intraparticle diffusion. The thermodynamic parameters determined in the study revealed that the adsorption of MG dye by sediment was unspontaneous and endothermic in nature. In three cycles, the regeneration of sediment following adsorption was confirmed. The adsorption process of MG dye onto sediment was found to be driven by two types of interactions - electrostatic and H-bonding. These results indicate that sediment has the potential to be an effective adsorbent for removing dyestuffs from contaminated industrial effluent. Moreover, the ready availability of sediment in the area further enhances its suitability for this purpose.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963392","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}
Hércules Gidel Lucena de Sousa, Damien Prim, Flavien Bourdreux, L. Gil
This study describes the synthesis of a new bioadsorbent from chitosan using ethylenediaminetetraacetic dianhydride (EDTAD) as modifying agent and its successful aplication for removal of cationic ion (Cu(II)) and oxyanion (Cr(VI)) from single component aqueous systems. The new multifunctionalized chitosan derivative (C1) was produced through chemical modification of primary hydroxyl function of chitosan with EDTAD to introduce carboxylic and tertiary amine functional groups, maintaining the secondary amines on the chitosan surface. Such a transformation was important to increase the adsorptive potential of chitosan but also to allow C1 to be used in acidic media, thus solving the problem of solubility of most chitosan derivatives. C1 was characterized by spectroscopic methods. The effects of solution pH, contact time, and initial solute concentration on removal of Cu(II) and Cr(VI) by C1 were investigated in aqueous solutions. C1 showed experimental maximum adsorption capacity of 106 mg g−1 for Cu(II) and 194 mg g−1 for Cr(VI).
{"title":"Synthesis and application of a new chitosan derivative for adsorption of Cu(II) and oxyanions of Cr(VI) from aqueous solution","authors":"Hércules Gidel Lucena de Sousa, Damien Prim, Flavien Bourdreux, L. Gil","doi":"10.1680/jenes.23.00010","DOIUrl":"https://doi.org/10.1680/jenes.23.00010","url":null,"abstract":"This study describes the synthesis of a new bioadsorbent from chitosan using ethylenediaminetetraacetic dianhydride (EDTAD) as modifying agent and its successful aplication for removal of cationic ion (Cu(II)) and oxyanion (Cr(VI)) from single component aqueous systems. The new multifunctionalized chitosan derivative (C1) was produced through chemical modification of primary hydroxyl function of chitosan with EDTAD to introduce carboxylic and tertiary amine functional groups, maintaining the secondary amines on the chitosan surface. Such a transformation was important to increase the adsorptive potential of chitosan but also to allow C1 to be used in acidic media, thus solving the problem of solubility of most chitosan derivatives. C1 was characterized by spectroscopic methods. The effects of solution pH, contact time, and initial solute concentration on removal of Cu(II) and Cr(VI) by C1 were investigated in aqueous solutions. C1 showed experimental maximum adsorption capacity of 106 mg g−1 for Cu(II) and 194 mg g−1 for Cr(VI).","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139788954","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}
Hércules Gidel Lucena de Sousa, Damien Prim, Flavien Bourdreux, L. Gil
This study describes the synthesis of a new bioadsorbent from chitosan using ethylenediaminetetraacetic dianhydride (EDTAD) as modifying agent and its successful aplication for removal of cationic ion (Cu(II)) and oxyanion (Cr(VI)) from single component aqueous systems. The new multifunctionalized chitosan derivative (C1) was produced through chemical modification of primary hydroxyl function of chitosan with EDTAD to introduce carboxylic and tertiary amine functional groups, maintaining the secondary amines on the chitosan surface. Such a transformation was important to increase the adsorptive potential of chitosan but also to allow C1 to be used in acidic media, thus solving the problem of solubility of most chitosan derivatives. C1 was characterized by spectroscopic methods. The effects of solution pH, contact time, and initial solute concentration on removal of Cu(II) and Cr(VI) by C1 were investigated in aqueous solutions. C1 showed experimental maximum adsorption capacity of 106 mg g−1 for Cu(II) and 194 mg g−1 for Cr(VI).
{"title":"Synthesis and application of a new chitosan derivative for adsorption of Cu(II) and oxyanions of Cr(VI) from aqueous solution","authors":"Hércules Gidel Lucena de Sousa, Damien Prim, Flavien Bourdreux, L. Gil","doi":"10.1680/jenes.23.00010","DOIUrl":"https://doi.org/10.1680/jenes.23.00010","url":null,"abstract":"This study describes the synthesis of a new bioadsorbent from chitosan using ethylenediaminetetraacetic dianhydride (EDTAD) as modifying agent and its successful aplication for removal of cationic ion (Cu(II)) and oxyanion (Cr(VI)) from single component aqueous systems. The new multifunctionalized chitosan derivative (C1) was produced through chemical modification of primary hydroxyl function of chitosan with EDTAD to introduce carboxylic and tertiary amine functional groups, maintaining the secondary amines on the chitosan surface. Such a transformation was important to increase the adsorptive potential of chitosan but also to allow C1 to be used in acidic media, thus solving the problem of solubility of most chitosan derivatives. C1 was characterized by spectroscopic methods. The effects of solution pH, contact time, and initial solute concentration on removal of Cu(II) and Cr(VI) by C1 were investigated in aqueous solutions. C1 showed experimental maximum adsorption capacity of 106 mg g−1 for Cu(II) and 194 mg g−1 for Cr(VI).","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139848727","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}
In recent years, the increasingly severe air pollution has not only posed a threat to residents’ health but also had a significant influence on tourists’ travel decision-making behaviors. This study utilized the empirical dynamic model-long short-term memory (EDM-LSTM) model to predict air pollutant concentrations in Xidi Village and investigated their impact on tourists’ travel decisions. According to the results, there is a negative correlation between air quality and air quality index (AQI). The lowest AQI indices were recorded in May and August 2022, with visitor numbers reaching 12,305 and 11,705 respectively. During the period from May to October, except for O3 which reached a maximum concentration of 157 ug/m3, all other pollutant concentrations remained at low levels. According to the model’s predictions, Xidi Village often experiences high concentrations of air pollutants during the spring and winter seasons, leading to hazy weather. This information provides accurate air quality data for tourists, helping them avoid periods of severe pollution at their travel destinations and reducing travel risks.
{"title":"Impact of abnormal air quality: a study on tourists’ decision-making behavior during rural tourism","authors":"Xianjuan Zu","doi":"10.1680/jenes.23.00093","DOIUrl":"https://doi.org/10.1680/jenes.23.00093","url":null,"abstract":"In recent years, the increasingly severe air pollution has not only posed a threat to residents’ health but also had a significant influence on tourists’ travel decision-making behaviors. This study utilized the empirical dynamic model-long short-term memory (EDM-LSTM) model to predict air pollutant concentrations in Xidi Village and investigated their impact on tourists’ travel decisions. According to the results, there is a negative correlation between air quality and air quality index (AQI). The lowest AQI indices were recorded in May and August 2022, with visitor numbers reaching 12,305 and 11,705 respectively. During the period from May to October, except for O3 which reached a maximum concentration of 157 ug/m3, all other pollutant concentrations remained at low levels. According to the model’s predictions, Xidi Village often experiences high concentrations of air pollutants during the spring and winter seasons, leading to hazy weather. This information provides accurate air quality data for tourists, helping them avoid periods of severe pollution at their travel destinations and reducing travel risks.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139852049","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}
In recent years, the increasingly severe air pollution has not only posed a threat to residents’ health but also had a significant influence on tourists’ travel decision-making behaviors. This study utilized the empirical dynamic model-long short-term memory (EDM-LSTM) model to predict air pollutant concentrations in Xidi Village and investigated their impact on tourists’ travel decisions. According to the results, there is a negative correlation between air quality and air quality index (AQI). The lowest AQI indices were recorded in May and August 2022, with visitor numbers reaching 12,305 and 11,705 respectively. During the period from May to October, except for O3 which reached a maximum concentration of 157 ug/m3, all other pollutant concentrations remained at low levels. According to the model’s predictions, Xidi Village often experiences high concentrations of air pollutants during the spring and winter seasons, leading to hazy weather. This information provides accurate air quality data for tourists, helping them avoid periods of severe pollution at their travel destinations and reducing travel risks.
{"title":"Impact of abnormal air quality: a study on tourists’ decision-making behavior during rural tourism","authors":"Xianjuan Zu","doi":"10.1680/jenes.23.00093","DOIUrl":"https://doi.org/10.1680/jenes.23.00093","url":null,"abstract":"In recent years, the increasingly severe air pollution has not only posed a threat to residents’ health but also had a significant influence on tourists’ travel decision-making behaviors. This study utilized the empirical dynamic model-long short-term memory (EDM-LSTM) model to predict air pollutant concentrations in Xidi Village and investigated their impact on tourists’ travel decisions. According to the results, there is a negative correlation between air quality and air quality index (AQI). The lowest AQI indices were recorded in May and August 2022, with visitor numbers reaching 12,305 and 11,705 respectively. During the period from May to October, except for O3 which reached a maximum concentration of 157 ug/m3, all other pollutant concentrations remained at low levels. According to the model’s predictions, Xidi Village often experiences high concentrations of air pollutants during the spring and winter seasons, leading to hazy weather. This information provides accurate air quality data for tourists, helping them avoid periods of severe pollution at their travel destinations and reducing travel risks.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139792248","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}
Superparamagnetic Fe3O4-MCM-41 was successfully synthesized using direct hydrothermal route and was utilized as an excellent adsorbent for the removal of 2,4-dichlorophenoxyacetic acid herbicide from aqueous solution. The superparamagnetic mesoporous adsorbent was fully characterized using XRD, FE-SEM, EDS, N2 sorption, and VSM. Synthesized adsorbent exhibited a high specific surface area of 444 m2.g−1, making it a suitable candidate for adsorption purposes where it provides higher adsorption capacity. Based on the VSM study, the recorded saturated magnetization was 15.9 emu.g−1 which confirms the viability of the adsorbent to be easily separable from an aqueous media by a magnet. The ability of Fe3O4-MCM-41 as an adsorbent of 2,4-dichlorophenoxyacetic acid herbicide from water was tested considering various parameters such as pH, adsorbent dosage, contact time, and pollutant concentration. The effectiveness of Fe3O4-MCM-41 in removing the herbicide reached its highest peak at pH = 5, 0.05 g adsorbent, 60 min contact time, and 10 mg/L 2,4-dichlorophenoxyacetic acid. The maximum removal efficiency at the optimum condition was 94.8%. Based on the experimental data and kinetic studies, adsorption process followed the pseudo-second ordered kinetic and Langmuir isotherm.
{"title":"Magnetically enhanced mesoporous silicate as an efficient adsorbent for the removal of phenoxy acid herbicide from aqueous solutions","authors":"Al-Hussein Imad Attwan Al-Mahfuz, A. Ghaemi","doi":"10.1680/jenes.23.00096","DOIUrl":"https://doi.org/10.1680/jenes.23.00096","url":null,"abstract":"Superparamagnetic Fe3O4-MCM-41 was successfully synthesized using direct hydrothermal route and was utilized as an excellent adsorbent for the removal of 2,4-dichlorophenoxyacetic acid herbicide from aqueous solution. The superparamagnetic mesoporous adsorbent was fully characterized using XRD, FE-SEM, EDS, N2 sorption, and VSM. Synthesized adsorbent exhibited a high specific surface area of 444 m2.g−1, making it a suitable candidate for adsorption purposes where it provides higher adsorption capacity. Based on the VSM study, the recorded saturated magnetization was 15.9 emu.g−1 which confirms the viability of the adsorbent to be easily separable from an aqueous media by a magnet. The ability of Fe3O4-MCM-41 as an adsorbent of 2,4-dichlorophenoxyacetic acid herbicide from water was tested considering various parameters such as pH, adsorbent dosage, contact time, and pollutant concentration. The effectiveness of Fe3O4-MCM-41 in removing the herbicide reached its highest peak at pH = 5, 0.05 g adsorbent, 60 min contact time, and 10 mg/L 2,4-dichlorophenoxyacetic acid. The maximum removal efficiency at the optimum condition was 94.8%. Based on the experimental data and kinetic studies, adsorption process followed the pseudo-second ordered kinetic and Langmuir isotherm.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139618271","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}
Luciano Cristian Cabral, V. Roveri, F. S. Cortez, Karla Aparecida Vasconcelos Alves da Cruz, Nicolau Teixeira Ramos, F. H. Pusceddu, L. Guimarães
Personal care products (PCPs) are increasingly studied worldwide to better understand their ecotoxicological effects on different aquatic species. However, studies assessing their ecotoxicological effects on tropical marine aquatic organisms are still scarce. To address this information gap, this study aimed to evaluate the acute and chronic toxicity of three PCPs: Methylparaben (MP), Propylparaben (PP), and Butylhydroxytoluene (BHT) on the tropical sea urchin Echinometra lucunter. The procedures were based on the protocols established by the U.S. Environmental Protection Agency (USEPA, 2009) and the Brazilian National Standards (ABNT NBR 15350, 2012). Predictive computational tools (OPERA QSAR and VEGA QSAR) were used to evaluate the persistence/biodegradability, bioaccumulation, and mobility of PCPs. Acute exposure results showed the following ranking of toxicity: BHT (IC50 = 38.14 mg.L−1) >PP (IC50 = 73.20 mg.L−1) >MP (IC50 = 74.47 mg.L−1). Chronic toxicity tests indicated that BHT presented the lowest IC50 (6.85 mg.L−1), followed by PP (IC50 = 15.57 mg.L−1) and MP (IC50 = 20.09 mg.L−1). Additionally, in silico predictions support the findings related to the potential risks of these PCPs in aquatic ecosystems. The data obtained in this study can support future analyses of environmental risk concerning PCPs and support the establishment of concentration limits in relevant legislation.
{"title":"Ecotoxicological effects of personal care products on the sea urchin Echinometra lucunter","authors":"Luciano Cristian Cabral, V. Roveri, F. S. Cortez, Karla Aparecida Vasconcelos Alves da Cruz, Nicolau Teixeira Ramos, F. H. Pusceddu, L. Guimarães","doi":"10.1680/jenes.22.00094","DOIUrl":"https://doi.org/10.1680/jenes.22.00094","url":null,"abstract":"Personal care products (PCPs) are increasingly studied worldwide to better understand their ecotoxicological effects on different aquatic species. However, studies assessing their ecotoxicological effects on tropical marine aquatic organisms are still scarce. To address this information gap, this study aimed to evaluate the acute and chronic toxicity of three PCPs: Methylparaben (MP), Propylparaben (PP), and Butylhydroxytoluene (BHT) on the tropical sea urchin Echinometra lucunter. The procedures were based on the protocols established by the U.S. Environmental Protection Agency (USEPA, 2009) and the Brazilian National Standards (ABNT NBR 15350, 2012). Predictive computational tools (OPERA QSAR and VEGA QSAR) were used to evaluate the persistence/biodegradability, bioaccumulation, and mobility of PCPs. Acute exposure results showed the following ranking of toxicity: BHT (IC50 = 38.14 mg.L−1) >PP (IC50 = 73.20 mg.L−1) >MP (IC50 = 74.47 mg.L−1). Chronic toxicity tests indicated that BHT presented the lowest IC50 (6.85 mg.L−1), followed by PP (IC50 = 15.57 mg.L−1) and MP (IC50 = 20.09 mg.L−1). Additionally, in silico predictions support the findings related to the potential risks of these PCPs in aquatic ecosystems. The data obtained in this study can support future analyses of environmental risk concerning PCPs and support the establishment of concentration limits in relevant legislation.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139532790","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}
Zahraa Al-Dawood, Bushra Tatan, Ruba El Mootassem, M. Mortula
While plastic mulch (PM) can increase crop yield and reduce weed growth, there are negative environmental impacts associated with the production, use, and disposal of PM films. There is currently a gap in the literature on the negative impacts of PM throughout its entire lifecycles, with most studies limited to investigating the global warming potential (GWP) of the practice during field operations. The objective of this study is to conduct a comprehensive life cycle assessment (LCA) for low density polyethylene PM for maize to investigate the environmental impacts of all stages of mulching. The LCA was conducted using SimaPro with data obtained from relevant literature and from the Ecoinvent database. The system boundaries include the production, transportation, installation, operation, removal, and disposal of the PM. The results reveal that the field operation of the PM has the highest impact in GWP. A sensitivity analysis was conducted to assess the effect of parameter variability for the field operations stage, and the GWP impact was observed to be sensitive to changes in carbon dioxide and net ecosystem carbon budget. The production of PM has the highest impact in abiotic depletion, but this impact can be reduced through energy recovery. Incineration yields the least harmful impacts, but the results of the study may vary depending on the exact disposal method. More data on the disposal of PM is needed to assess its impacts reliably and reduce uncertainties in the results. The impact of PM can be mitigated through proper waste management and mitigation measures, including regulations on disposal.
{"title":"A comprehensive lifecycle assessment of plastic mulching for maize","authors":"Zahraa Al-Dawood, Bushra Tatan, Ruba El Mootassem, M. Mortula","doi":"10.1680/jenes.23.00001","DOIUrl":"https://doi.org/10.1680/jenes.23.00001","url":null,"abstract":"While plastic mulch (PM) can increase crop yield and reduce weed growth, there are negative environmental impacts associated with the production, use, and disposal of PM films. There is currently a gap in the literature on the negative impacts of PM throughout its entire lifecycles, with most studies limited to investigating the global warming potential (GWP) of the practice during field operations. The objective of this study is to conduct a comprehensive life cycle assessment (LCA) for low density polyethylene PM for maize to investigate the environmental impacts of all stages of mulching. The LCA was conducted using SimaPro with data obtained from relevant literature and from the Ecoinvent database. The system boundaries include the production, transportation, installation, operation, removal, and disposal of the PM. The results reveal that the field operation of the PM has the highest impact in GWP. A sensitivity analysis was conducted to assess the effect of parameter variability for the field operations stage, and the GWP impact was observed to be sensitive to changes in carbon dioxide and net ecosystem carbon budget. The production of PM has the highest impact in abiotic depletion, but this impact can be reduced through energy recovery. Incineration yields the least harmful impacts, but the results of the study may vary depending on the exact disposal method. More data on the disposal of PM is needed to assess its impacts reliably and reduce uncertainties in the results. The impact of PM can be mitigated through proper waste management and mitigation measures, including regulations on disposal.","PeriodicalId":15665,"journal":{"name":"Journal of Environmental Engineering and Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139445129","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}
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