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A Comparative Structural Study of Southern Region Shallow Basement of the North-Kivu Province (DR Congo) by Gravity and Magnetic Data Analysis 基于重磁资料分析的刚果(金)北基伍省南部地区浅基底构造对比研究
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.119007
Albert Mbata Muliwavyo, Jonathan Musitu Muliwavyo, Lumière Musitu, Jean-Marie Joackim Hangi Vuvuya Kataka, Jean-Marie Tshitenge Mbuebue, Clément N’Zau Umba-Di-Mbudi
The aim of this study is to characterize the subsoil in the southern region of the North-Kivu province (DR Congo). Gravity and geomagnetic data were used in this study. Five different filters—the horizontal gradient magnitude, the analytic signal, the tilt derivative, the horizontal derivative of tilt derivative and the tilt angle of horizontal gradient—enabled us to delineate the gravity and magnetic anomaly sources present in the shallow subsurface of the study area. The plains of the Rutshuru territory are dominated by sources of weak gravity anomalies and sources of very weak magnetic anomalies located almost in the same places. The southern part of Rutshuru territory and a large part of Masisi territory are underlain by shallow sources of high gravity and magnetic anomalies. Gravity and magnetic anomaly sources are almost identical in the study area. The shallow sources of gravity and magnetic anomalies encountered in our study area are more or less linear and connected. The numerous gravity and magnetic lineaments present in our study region have three major directions: oriented East-West, North-South and North-East-South-West.
本研究的目的是表征北基伍省(刚果民主共和国)南部地区的底土。本研究使用了重力和地磁数据。利用水平梯度震级、解析信号、倾斜导数、倾斜导数的水平导数和水平梯度的倾斜角度等5种不同的滤波方法,圈定了研究区浅层地下的重磁异常源。Rutshuru地区的平原主要是弱重力异常源和极弱磁异常源,它们几乎位于相同的地方。Rutshuru地区的南部和Masisi地区的大部分地区是高重磁异常的浅层源。研究区内的重磁异常源几乎相同。研究区浅层重磁异常源或多或少呈线性联系。研究区重磁面分布丰富,主要有东西向、南北向和东北-西南向三个方向。
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引用次数: 0
Assessment of Climate Variability and Agricultural Activities in the Area of Tadla Plain 塔德拉平原地区气候变率与农业活动评价
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.1111001
Yousra El Baki, Khalid Boutoial, Abdelouahid Medaghri-Alaoui
The variations in both precipitation and temperature have far-reaching effects on agricultural activities and the accessibility of water resources. These climatic parameters are pivotal in determining the availability of both groundwater and surface water for agricultural use. The aim of this study was to evaluate the variations in climate parameters, focusing on precipitation and temperature, alongside changes in cultivated land area and crop yields in the Tadla area (Béni Mellal Khénifra region, Morocco); additionally, our research looks at the changes in water inflow into two dams and four aquifers. Trends were assessed over the period of 2010-2020 using the standardized precipitation index (SPI) method, as well as the parametric regression method and nonparametric Mann-Kendall and Sen’s slope test. This analysis can be a preliminary step in demonstrating the effects of climate variability on water resource availability and its adverse impacts on agriculture in the region. The results showed a decreasing trend for some yield crops despite the increase in the cultivated area. The results of the groundwater levels and inflow dams showed a significant upward evolution. The analysis of the obtained SPI values and temperatures has revealed a notable and consistent upward trendencies. This upward trajectory indicates that both the SPI values, which reflect precipitation patterns and the temperatures, have been on the rise over the examined period. These results prompt reflection on the effects of climate variability on water resources in the region and economic activities, particularly agriculture.
降水和温度的变化对农业活动和水资源的可及性有着深远的影响。这些气候参数是决定地下水和地表水供农业使用的关键。这项研究的目的是评估气候参数的变化,重点是降水和温度,以及Tadla地区(bsamini Mellal khsamunifra地区,摩洛哥)耕地面积和作物产量的变化;此外,我们的研究着眼于流入两个大坝和四个含水层的水的变化。采用标准化降水指数(SPI)法、参数回归法和非参数Mann-Kendall和Sen 's斜率检验评估了2010-2020年的趋势。这一分析可以作为证明气候变率对水资源可用性的影响及其对该地区农业的不利影响的初步步骤。结果表明,尽管耕地面积增加,但某些产量作物的产量却有下降趋势。地下水位和入流坝均呈明显的上升趋势。对测得的SPI值和温度的分析显示出明显的持续上升趋势。这种上升轨迹表明,反映降水模式和温度的SPI值在研究期间都在上升。这些结果促使人们思考气候变率对该地区水资源和经济活动(特别是农业)的影响。
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引用次数: 0
Coastal Vulnerability Assessment of Rapu-Rapu and the West Coast of Albay Province, Philippines 菲律宾拉普-拉普和阿尔拜省西海岸沿海脆弱性评估
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.1110016
Angelo P. Candelaria, Christian L. Baiño
Coastal vulnerability assessment using the Integrated Sensitivity, Exposure, and Adaptive Capacity to Climate Change Vulnerability Assessment (ICSEA-C-Change) tool provides a deeper understanding of the potential impacts of climate change on coastal zones. Vulnerability ratings were obtained using rubrics that were presented to the stakeholders during focused group discussions. Derived scores were then averaged and consolidated to come up with the overall vulnerability rating. These ratings were based on the resource and status of coastal habitats’ reliance on near-shore fishing and other quality measures like fisheries ecosystem dependency, population, and water quality of the coastal habitats in the barangays. Ratings resulted in identifying 12 barangays out of 23 that are highly vulnerable to climate change impacts such as waves, storm surges, sea level rise, increase in surface temperature, and extreme rainfall. These are Buenavista and Basicao (Pioduran), Catburawan (Ligao), Tapel, Nagas and Maramba (Oas), Talin-Talin, Pantao, Macabugos, and Tambo (Libon) and Buhatan and Villa Hermosa (Rapu-Rapu). Assessment results were highly influenced by the absence of three major marine habitats, i.e., coral reefs, seagrass/seaweeds, and mangroves in the coastal areas. Likewise, 11 barangays out of 23, which were Marigondon and Malidong (Pioduran), Maonon and Cabarian (Ligao), Badian and Cagmanaba (Oas), Apud and Rawis (Libon), and Galicia, Hamorawon, and Poblacion (Rapu-Rapu) obtained moderate vulnerability scores. This was attributed to the presence of marine habitats that although in poor state, may serve their ecological functioning when properly protected. Highly vulnerable barangays must be prioritized in coastal rehabilitation and disaster risk reduction management planning. Parameters encompassing the sensitivity and adaptive capacity of each barangay must be taken into consideration to reduce potential impacts brought by factors attributed to climate change. Vital information from the assessment will serve as basis for developing strategic plans for improving the climate change adaptation strategies of the local government units.
利用气候变化脆弱性综合敏感性、暴露度和适应能力评估(ICSEA-C-Change)工具进行沿海脆弱性评估,可以更深入地了解气候变化对海岸带的潜在影响。脆弱性评级是使用在焦点小组讨论期间向利益相关者提出的规则获得的。然后对所得分数进行平均和合并,得出总体脆弱性评级。这些评级是基于沿海栖息地的资源和近岸渔业依赖状况以及其他质量指标,如渔业生态系统依赖性、人口和沿海栖息地的水质。评级结果显示,在23个村庄中,有12个村庄极易受到气候变化的影响,如海浪、风暴潮、海平面上升、地表温度升高和极端降雨。它们是布埃纳维斯塔和巴斯考(Pioduran), Catburawan (Ligao), Tapel, Nagas和Maramba (Oas), Talin-Talin, Pantao, Macabugos和Tambo (Libon)以及Buhatan和Villa Hermosa (Rapu-Rapu)。由于沿海地区缺乏三种主要的海洋生境,即珊瑚礁、海草/海藻和红树林,评估结果受到很大影响。同样,23个村庄中有11个村庄获得了中等脆弱性评分,分别是马里贡登和马里东(Pioduran)、马翁农和卡布里安(Ligao)、巴甸和Cagmanaba (Oas)、阿普德和拉伊斯(Libon)以及加利西亚、哈莫拉旺和波布拉西翁(Rapu-Rapu)。这是由于海洋栖息地的存在,尽管状况不佳,但如果得到适当的保护,可能会发挥其生态功能。在沿海恢复和减少灾害风险管理规划中,必须优先考虑高度脆弱的村庄。为了减少气候变化因素带来的潜在影响,必须考虑各个村落的敏感性和适应能力等参数。评估的重要信息将作为制定战略计划的基础,以改善地方政府单位的气候变化适应战略。
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引用次数: 0
ASTER Data Processing by Discrete Wavelets Transform and Band Ratio Techniques for the Identification of Lineaments and Hydrothermal Alteration Zones in Poli, North Cameroon 用离散小波变换和带比技术处理ASTER数据识别喀麦隆北部波利地区的地貌和热液蚀变带
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.119014
Mohamadou Ahamadou, May Nome Stella, Meying Arsène
The aim of this study is to carry out hydrothermal alteration mapping and structural mapping using ASTER images in order to identify indices that could guide mining exploration work in the Poli area and its surroundings. To achieve this, the ASTER images were first preprocessed to correct atmospheric effects and remove vegetation influence. Secondly, a lineament mapping was conducted by applying Discrete Wavelet Transform (DWT) algorithms to the First Principal Component Analysis (PCA1) of Visible Near-Infrared (VNIR) and Shortwave Infrared (SWIR) bands. Lastly, band ratio methods were applied to the VNIR, SWIR, and Thermal Infrared (TIR) bands to determine indices of iron oxides/hydroxides (hematite and limonite), hydroxyl-bearing minerals (chlorite, epidote, and muscovite), and the quartz index. The results obtained showed that the lineaments were mainly oriented NE-SW, ENE-WSW, and E-W, with NE-SW being the most predominant direction. Concerning hydrothermal alteration, the identified indices covered almost the entire study area and showed a strong correlation with lithological data. Overlaying the obtained lineaments with the hydrothermal alteration indices revealed a significant correlation between existing mining indices and those observed in the field. Mineralized zones generally coincided with areas of high lineament density exhibiting significant hydrothermal alteration. Based on the correlation between existing mining indices and the results of hydrothermal and structural mapping, the results obtained can then be used as a reference document for any mining exploration in the study area.
利用ASTER成像进行热液蚀变填图和构造填图,以确定指导波里地区及周边地区采矿勘探工作的指标。为了实现这一目标,首先对ASTER图像进行预处理,以校正大气影响并消除植被影响。其次,将离散小波变换(DWT)算法应用于可见光近红外(VNIR)和短波红外(SWIR)波段的第一主成分分析(PCA1)进行了纹理映射;最后,将波段比值法应用于近红外、SWIR和热红外(TIR)波段,确定氧化铁/氢氧化物(赤铁矿和褐铁矿)、含羟基矿物(绿泥石、绿帘石和白云母)和石英指数。结果表明,该构造物以NE-SW、ENE-WSW和E-W为主,以NE-SW为主。热液蚀变识别指标几乎覆盖了整个研究区,且与岩性资料具有较强的相关性。利用热液蚀变指数叠加得到的矿化特征,发现现有矿化指数与现场观测值具有显著的相关性。矿化带一般与具有明显热液蚀变特征的高线相吻合。根据现有采矿指标与热液和构造填图结果的相关性,得出的结果可作为研究区任何采矿勘探的参考文献。
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引用次数: 0
Physicochemical Properties and Health Risks of Informal E-Waste Processing at Alaba International Market in Lagos, Nigeria 尼日利亚拉各斯阿拉巴国际市场非正规电子废物处理的理化性质和健康风险
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.119012
Adedoyin Olubunmi Bankole, Akinyemi Olufemi Ogunkeyede, Judith Ngoli Odionye, Benjamin Giwa, Oliver Chinonso Mbaoma, Bamidele Honesty Akpeji, Ekaette Akpan Fadairo, Efe Jeffery Isukuru
This study investigated the groundwater quality and health risks associated with informal e-waste processing in the Alaba International Market in Lagos, Nigeria. Twenty-two groundwater samples were collected from hand-dug wells in the market area and analyzed for physicochemical properties and heavy metal concentrations. The results showed that the groundwater quality was poor, with high levels of heavy metals, including cadmium, lead, and chromium. The health index (HI) for children and adults was above the tolerable threshold levels, indicating a potential health risk to the population. Principal component analysis and hierarchical cluster analysis were used to identify the sources of metals in groundwater, and the results showed that informal e-waste processing was a significant source of contamination. The study highlights the need for effective management strategies to mitigate the potential health risks associated with informal e-waste processing and ensure public health and environmental safety.
本研究调查了尼日利亚拉各斯阿拉巴国际市场与非正式电子废物处理有关的地下水质量和健康风险。从市场区域的手挖井中采集了22个地下水样本,分析了其理化性质和重金属浓度。结果表明,该地区地下水水质较差,镉、铅、铬等重金属含量较高。儿童和成人的健康指数(HI)高于可容忍阈值水平,表明对人口存在潜在的健康风险。采用主成分分析和层次聚类分析对地下水中金属的来源进行了识别,结果表明,非正式的电子垃圾处理是地下水中金属的重要污染源。该研究强调需要制定有效的管理战略,以减轻与非正式电子废物处理有关的潜在健康风险,并确保公共健康和环境安全。
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引用次数: 0
Assessing the Ecological Consequences: Biodiversity Decline in Gopalganj, Bangladesh, under Climate Change 评估生态后果:气候变化下孟加拉国Gopalganj的生物多样性下降
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.119019
Md. Akik Tanjil Jihan, Rifat Islam, Md. Rajib Hossain, Saif Hossain, Rudba Islam, Taspia Jahan, Rifat Jahan, Md. Mustafizur Rahman, Md. Mirhazul Islam
This research critically examines the alarming case of biodiversity loss in Gopalganj, Bangladesh, focusing on identifying the causes of this decline and assessing its long-term impact on ecosystems and communities. The main reason is anthropogenic activities, including land conversion, and infrastructure using a comprehensive approach. This research employs a combination of primary and secondary data analysis techniques, encompassing surveys, focus group discussions, interviews, and field surveys. Findings: A staggering biological decline in ethnic diversity seems predictions point in the direction of it is an alarming trend that will take place by 2054. At the same time, the study reveals a worrying decline in vegetation and a dramatic expansion of built-up areas. In light of these findings, this paper strongly emphasizes the urgent need for immediate and coordinated conservation efforts. The proposed measures include conservation and restoration of critical areas, strong measures to reduce greenhouse gas emissions, proactive climate adaptation planning, promotion of sustainable agricultural and forestry practices, and strong public awareness campaigns to emphasize the critical importance of biodiversity conservation. Collectively, these actions are pivotal in safeguarding Gopalganj’s rich biodiversity and ensuring a sustainable future for the region and the planet at large.
这项研究批判性地考察了孟加拉国戈帕尔甘杰令人震惊的生物多样性丧失案例,重点是确定这种下降的原因,并评估其对生态系统和社区的长期影响。主要原因是人类活动,包括土地转换,以及使用综合方法的基础设施。本研究结合了一手和二手数据分析技术,包括调查、焦点小组讨论、访谈和实地调查。研究结果:种族多样性的惊人生物下降似乎是一个令人担忧的趋势,预测将在2054年发生。与此同时,该研究揭示了令人担忧的植被减少和建成区的急剧扩张。鉴于这些发现,本文强烈强调迫切需要立即和协调的保护工作。建议的措施包括保护和恢复关键区域,采取强有力的措施减少温室气体排放,积极的气候适应规划,促进可持续的农业和林业实践,以及加强公众意识,以强调生物多样性保护的重要性。总的来说,这些行动对于保护戈帕尔甘杰丰富的生物多样性和确保该地区乃至整个地球的可持续未来至关重要。
{"title":"Assessing the Ecological Consequences: Biodiversity Decline in Gopalganj, Bangladesh, under Climate Change","authors":"Md. Akik Tanjil Jihan, Rifat Islam, Md. Rajib Hossain, Saif Hossain, Rudba Islam, Taspia Jahan, Rifat Jahan, Md. Mustafizur Rahman, Md. Mirhazul Islam","doi":"10.4236/gep.2023.119019","DOIUrl":"https://doi.org/10.4236/gep.2023.119019","url":null,"abstract":"This research critically examines the alarming case of biodiversity loss in Gopalganj, Bangladesh, focusing on identifying the causes of this decline and assessing its long-term impact on ecosystems and communities. The main reason is anthropogenic activities, including land conversion, and infrastructure using a comprehensive approach. This research employs a combination of primary and secondary data analysis techniques, encompassing surveys, focus group discussions, interviews, and field surveys. Findings: A staggering biological decline in ethnic diversity seems predictions point in the direction of it is an alarming trend that will take place by 2054. At the same time, the study reveals a worrying decline in vegetation and a dramatic expansion of built-up areas. In light of these findings, this paper strongly emphasizes the urgent need for immediate and coordinated conservation efforts. The proposed measures include conservation and restoration of critical areas, strong measures to reduce greenhouse gas emissions, proactive climate adaptation planning, promotion of sustainable agricultural and forestry practices, and strong public awareness campaigns to emphasize the critical importance of biodiversity conservation. Collectively, these actions are pivotal in safeguarding Gopalganj’s rich biodiversity and ensuring a sustainable future for the region and the planet at large.","PeriodicalId":15859,"journal":{"name":"Journal of Geoscience and Environment Protection","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135700832","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
Breeding Biology of Isolated Captive Dalmatian Pelicans (<i>Pelecanus crispus</i>) at the Shanghai Zoo, China 中国上海动物园圈养斑点鹈鹕(<i>Pelecanus crispus</i>)的繁殖生物学
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.1110001
Zhengqiang Xu, Ying Zhou, Zhibing Chen
The breeding biology of a captive, isolated population of Dalmatian Pelicans (Pelecanus crispus) at theShanghaiZoo,China, was studied from 2007 to 2019. The breeding age of the Dalmatian Pelicans was estimated at three to four years old, and they started breeding in late October or early November. The clutch size varied between one and two eggs per nest, and the eggs were 83.2 ±4.8 mmin length, 55.6 ±2.9 mmin breadth and 136.1 ±21.5 gin weight. The fertility fluctuated slightly, with an average rate of 38.7% ± 9.7%, but remained consistently low. The survival rate of chicks fluctuated substantially from 0% to 100%, with an average survival rate of 68.6% ± 27.6%. The averaged values of observed heterozygosity, expected heterozygosity and polymorphism information content were 0.468, 0.465 and 0.446, respectively. It indicated that the population had a low heterozygosity and genetic diversity. There was a significant change in the breeding index compared to that recorded 40 years ago, which indicates that inbreeding depression has occurred in this small, isolated, captive population of Dalmatian Pelicans. These results can be used to improve management of Dalmatian Pelicans in captivity.
2007年至2019年,在中国上海动物园对一个圈养的、孤立的达尔马提亚鹈鹕(Pelecanus crispus)种群进行了繁殖生物学研究。达尔马提亚鹈鹕的繁殖年龄估计为3至4岁,它们在10月底或11月初开始繁殖。卵长83.2±4.8 mm,卵宽55.6±2.9 mm,卵重136.1±21.5 gin。生育率略有波动,平均为38.7%±9.7%,但一直处于较低水平。雏鸡成活率在0% ~ 100%之间波动较大,平均成活率为68.6%±27.6%。观察杂合度、期望杂合度和多态性信息含量的平均值分别为0.468、0.465和0.446。表明该群体杂合性和遗传多样性较低。与40年前的记录相比,繁殖指数发生了重大变化,这表明在这个小的、孤立的、圈养的达尔马提亚鹈鹕种群中,近亲繁殖的减少已经发生。这些结果可用于改善圈养达尔马提亚鹈鹕的管理。
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引用次数: 0
Evolution of the Physico-Chemical Quality of the Water in the Manantali Dam Reservoir from 1989 (One Year after Impoundment) to 2022 1989年(蓄水后1年)至2022年马南塔里水库水理化质量演变
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.119022
Joseph Mbeur Faye, Saïdou Ndao, Louis Eugène Victor Sambou
The Manantali dam is located on the Bafing River in the Kayes region of Mali. It is the main tributary of the Senegal River. The water released from the dam provides year-round access to water for drinking, irrigation and livestock watering. The Manantali dam regulates the river’s flow, generates energy and supports agricultural development in all three countries (Mali, Mauritania, and Senegal). The aim of this article is to monitor changes in the physico-chemical quality of the water in the dam’s reservoir from 1989 (one year after the dam was impounded) to 2022. In order to carry out this work, we analysed the evolution of physico-chemical parameters in Stations 1 and 3 of the dam, on the basis of fluctuating water levels in the reservoir. The results obtained show a similarity in the parameters measured at the two stations, except for iron content, which is higher at Station 3. The average pH is weakly basic (7.44 at Station 1 and 7.29 at Station 3) and the average water temperature is between 26.5°C at Station 1 and 26.2°C at Station 3. The average conductivity of the water at Station 1 is 38.8 μS/cm and 39.8 μS/cm at Station 3, attesting to low mineralization of the water. The oxygen content of 5.75 mg/L at Station 1 and 5.00 mg/L at Station 3 shows good oxygenation of the water, which is favorable for the development of most fish and aquatic plant species. Ammonium levels of 0.02 mg/L at Station 1 and 0.06 mg/L at Station 3 show that the water is not contaminated. In addition, the Water Quality Index (WQI) was calculated, showing excellent water quality at Station 1 and good quality at Station 3. Overall, the results obtained show that the water is of good quality, enabling the authorities of the Organization for the Development of the Senegal River (OMVS) to achieve their development objectives.
Manantali大坝位于马里Kayes地区的Bafing河上。它是塞内加尔河的主要支流。从大坝释放的水提供了全年的饮用水、灌溉和牲畜用水。马南塔利大坝调节河流流量,产生能源,并支持这三个国家(马里、毛里塔尼亚和塞内加尔)的农业发展。本文的目的是监测1989年(大坝被扣押后一年)至2022年大坝水库水的理化质量变化。为了开展这项工作,我们根据水库水位的波动,分析了大坝1站和3站的理化参数的演变。得到的结果表明,除了3号站铁含量较高外,两个站点测量的参数相似。平均pH值为弱碱性(站1为7.44,站3为7.29),平均水温在站1的26.5℃至站3的26.2℃之间。1站位水的平均电导率为38.8 μS/cm, 3站位水的平均电导率为39.8 μS/cm,表明水的矿化程度较低。1号站和3号站的氧含量分别为5.75 mg/L和5.00 mg/L,表明水体氧合良好,有利于大多数鱼类和水生植物的发育。1号站的铵含量为0.02 mg/L, 3号站的铵含量为0.06 mg/L,这表明水没有受到污染。此外,计算了水质指数(WQI),结果表明1号站水质优良,3号站水质良好。总体而言,获得的结果表明,水质良好,使塞内加尔河发展组织(OMVS)当局能够实现其发展目标。
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引用次数: 0
Assessing the Metal Recovery Value of Municipal Solid Waste Incineration Residues: Impact of Pretreatment on Fly Ash and Bottom Ash 城市生活垃圾焚烧渣金属回收价值评价:预处理对飞灰和底灰的影响
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.1110007
Pengfei Li, Takayuki Shimaoka
This paper focuses on evaluating the metal recovery potential of Municipal Solid Waste Incineration (MSWI) residues, with particular emphasis on the influence of pretreatment methods on MSWI fly ash and bottom ash. We assess the effectiveness of these pretreatments in enhancing the concentration of valuable metals and compare the metal content before and after treatment. Our findings reveal that water washing significantly enhances fly ash’s zinc and copper content, surpassing the minimum industrial-grade requirements. Mechanical sieving is an efficient pretreatment method for bottom ash, with the zinc concentration inversely related to particle size. Additionally, copper content peaks in the 1 - 2 mm particle size range for both bottom ash samples. These results provide valuable insights into the potential for metal recovery from MSWI residues. They hold significance for relevant research, engineering practices, and policy formulation.
本文对城市生活垃圾焚烧废渣的金属回收潜力进行了评价,重点研究了预处理方法对城市生活垃圾焚烧废渣飞灰和底灰的影响。我们评估了这些预处理在提高有价金属浓度方面的有效性,并比较了处理前后的金属含量。我们的研究结果表明,水洗显著提高了飞灰的锌和铜含量,超过了工业级的最低要求。机械筛分是一种有效的底灰预处理方法,锌浓度与粒度成反比。此外,两种底灰样品的铜含量均在1 ~ 2mm粒度范围内达到峰值。这些结果为从城市生活垃圾残渣中回收金属的潜力提供了有价值的见解。它们对相关研究、工程实践和政策制定具有重要意义。
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引用次数: 0
Rapid Urbanization and Environment Management in Nkafu Municipality, Eastern DR Congo 刚果民主共和国东部恩卡富市的快速城市化和环境管理
Pub Date : 2023-01-01 DOI: 10.4236/gep.2023.1110009
Alain Tshimbalanga, Patient M. Zamukulu, Liévin Chirhalwirwa, Katcho Karume
Rapid and uncontrolled urbanization as well as urban land management are major constraints to land planning in the Democratic Republic of Congo. A household data collection and analysis was carried out in 283 random households in the Nkafu municipality, eastern DR Congo, to assess the local community’s perception of rapid urbanization and its impact on land policy and management of the built landscape. Data of socio-demographics characteristics, rapid urbanization, and environment management data were collected and analyzed using XLStat version 2019. In addition, the study area location map, land use and cover change maps were generated using ArcMap 10.8. Results indicate that landowners are dominant and, build simple houses with unsustainable building materials (i.e. wooden plank) obtained locally. In addition, land management is not appreciated by local communities, due to anarchic construction due to lack of financial resources generating thus an increasing amount of urban waste, which is poorly managed. The study suggests, urban roads renew, building in conformity with urban planning and building regulations, potable water supply and health services availability to improve the study area. Geographic Information Systems (GIS) use, would provide spatial information on land planning in the study area.
快速和不受控制的城市化以及城市土地管理是刚果民主共和国土地规划的主要制约因素。在刚果民主共和国东部Nkafu市的283个随机家庭中进行了家庭数据收集和分析,以评估当地社区对快速城市化的看法及其对土地政策和建筑景观管理的影响。使用XLStat version 2019对社会人口特征、快速城市化和环境管理数据进行收集和分析。此外,利用arcmap10.8软件生成研究区位置图、土地利用和覆被变化图。结果表明,土地所有者占主导地位,他们用当地获得的不可持续的建筑材料(如木板)建造简单的房屋。此外,土地管理不受当地社区的赞赏,由于缺乏财政资源而导致的无政府主义建设产生了越来越多的城市垃圾,而这些垃圾管理不善。研究建议,城市道路更新,建筑符合城市规划和建筑法规,改善研究区域的饮用水供应和卫生服务的可用性。使用地理信息系统(GIS),将提供有关研究地区土地规划的空间信息。
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引用次数: 0
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Journal of Geoscience and Environment Protection
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