Article
Environmental Sciences
Wawan Budianta
Summary: This study revealed significant heavy metal pollution in the stream sediment of the Tajum River, primarily due to artisanal mining activities. The distribution and mobility of heavy metals are influenced by mining activities, with Zn and Cd showing lower mobility in sediment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Vladimir Dauvalter, Zakhar Slukovskii, Dmitry Denisov, Alina Guzeva
Summary: The chemical composition of sediments from Lake Bolshoy Vudjavr in the Russian Arctic zone was studied. The sediments have been heavily polluted by wastewater from apatite-nepheline production and atmospheric fallout, resulting in the enrichment of alkali and alkaline earth metals, N, P, and other elements. The pollution level of the sediments increased significantly after the launch of the Apatite Plant.
Article
Environmental Sciences
Jean Claude Ndayishimiye, Tian Lin, Pascaline Nyirabuhoro, Gan Zhang, Wenjing Zhang, Yuri Mazei, Hossein Ganjidoust, Jun Yang
Summary: This study focused on examining the impact of human activities on chemical pollutants influx and environmental transformations in a large subtropical reservoir in south China. The research used a multi-proxy approach based on sediment core analysis and found that the development of the reservoir experienced two distinct stages, influenced by both anthropogenic sources and climatic factors. The study highlighted the significant relationship between testate amoebae community dynamics and environmental conditions, indicating a stronger impact of human disturbance on the ecosystem compared to natural environmental changes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Koffi Pierre Dit Adama N'goran, Donourou Diabate, N'Guessan Louis Berenger Kouassi, Koffi Marcellin Yao, Kakou Charles Kinimo, Ahbeauriet Ahmed Ouattara, Albert Trokourey
Summary: The purpose of this study was to investigate the mobility, spatial distribution, possible sources, and potential ecological risks associated with trace metals Cu, Mn, and Ni in sediments around industrial and artisanal gold mines in northern Cote d'Ivoire. The results indicated that the concentrations of Cu, Ni, and Mn did not vary across different sampling stations. The possible pollution sources were identified as both anthropogenic and natural inputs. The extraction procedure showed low mobility of these trace metals. The risk assessment indicated low-to-medium risk for organisms.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Environmental Sciences
J. P. Corella, M. J. Sierra, A. Garralon, R. Millan, J. Rodriguez-Alonso, M. P. Mata, A. Vicente de Vera, A. Moreno, P. Gonzalez-Samperiz, B. Duval, D. Amouroux, P. Vivez, C. A. Cuevas, J. A. Adame, B. Wilhelm, A. Saiz-Lopez, B. L. Valero-Garces
Summary: The study analyzed potential harmful trace elements in sediment cores from Lake Marbore, reconstructing the fluxes of trace metal pollutants over the last 3000 years in the Central Pyrenees. The research revealed a strong mining-related pollution legacy in alpine lakes and watersheds, emphasizing the need for consideration in management plans for mountain ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Kathryn Vall, Collin Murphy, David P. Pompeani, Byron A. Steinman, Kathryn M. Schreiner, Daniel J. Bain, Seth DePasqual, Zachary Wagner
Summary: This study investigates the timing and transport mechanisms of pollution associated with ancient copper mining on Isle Royale in Lake Superior, United States. The results indicate that pollution from mining emissions about 6000 years ago was transported atmospherically and affected nearby lakes, providing insights into the spatial patterns and magnitude of early metal mining efforts.
Article
Engineering, Environmental
Lorena S. Miranda, Buddhi Wijesiri, Godwin A. Ayoko, Prasanna Egodawatta, Ashantha Goonetilleke
Summary: The study reveals that the mineralogical composition of sediments plays a crucial role in the adsorption and desorption of heavy metals. Particulate organic matter is the most influential nutrient in heavy metals adsorption in riverine environments, while particulate phosphorus is more significant in estuarine conditions. Dissolved nutrients do not have a significant positive effect on the release of heavy metals in riverine areas, but dissolved phosphorus increases the transfer of specific metals from sediments to overlying water in estuarine conditions.
Article
Environmental Sciences
Baoying Wang, Jianyu Lin, Xiaogang Wu, Yinian Xue, Chao Han, Zhihong Zhang, Jinghua Ren, Qiushi Shen
Summary: The study characterized the high-density distribution patterns of nutrients and heavy metals in sediments from Lake Luoma, as well as their pollution status and ecological risks. The pollutants were found to mainly come from fertilizers, pesticides, and industrial wastewater, providing important reference for water pollution control in the basin.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Xuan Wang, Yingying Zhi, Yun Chen, Nan Shen, Guoxiang Wang, Yan Yan
Summary: Evidence suggests that phosphorus deposited in sediment for many years can be released by microbial activity, causing harmful algal blooms in lakes. Sediment microbial fuel cells (SMFC) have been identified as an in-situ method for limiting phosphorus release. However, the impact of SMFC on the micro-environment near the electrodes, which can affect phosphorus distribution, has been overlooked. This study successfully established SMFC systems to investigate their influence on phosphorus species and spatial distribution in lake sediments.
Article
Environmental Sciences
Kennedy Achieng Odhiambo, Henry Joseph Oduor Ogola, Benson Onyango, Memory Tekere, Grace N. Ijoma
Summary: This study analyzed the bacterial distribution and metabolic functions in sediment of two urban streams in Kenya. The results showed that the highly urbanized areas of the streams had severely polluted sediment with potential pathogenic bacteria. Environmental factors were found to be significant drivers of bacterial community composition.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Lorena S. Miranda, Godwin A. Ayoko, Prasanna Egodawatta, Ashantha Goonetilleke
Summary: Limited knowledge of the combined effects of water and sediment properties and metal ionic characteristics on the solid-liquid partitioning of heavy metals constrains the effective management of urban waterways. The study revealed that high salinity can increase the solubility of weakly-bound metals, while dissolved organic matter does not favor metal solubility.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Lorena S. Miranda, Godwin A. Ayoko, Prasanna Egodawatta, Wan-Ping Hu, Osama Ghidan, Ashantha Goonetilleke
Summary: This study examines the influence of sediment physico-chemical properties on metal bioavailability, highlighting the specific behaviors of different metal elements in sediments, and provides valuable information for future research in this area.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Weiwei Liu, Ziliang Guo, Henian Wang, Daan Wang, Manyin Zhang
Summary: A comprehensive analysis of the spatial and temporal variations of heavy metals in wetland sediment can provide valuable conservation strategies for further wetland management. The study found a decrease in concentrations and assessment indexes for most heavy metals in Hengshui Lake, with Hg and Cd showing moderate enrichment and potential ecological risk. The findings underscore the importance of targeted implementation of wetland conservation and restoration projects for contamination control and management strategies.
Article
Environmental Sciences
Bochra Brik, Moez Shaiek, Lamia Trabelsi, Kamel Regaya, Nabiha Ben Mbarek, Bechir Bejaoui, Maria Virginia Alves Martins, Noureddine Zaaboub
Summary: This study assessed the sediment quality of Lake Ichkeul and its surrounding catchment areas. The results showed that the lake bottom is composed of muddy sediments with high contents of phyllosilicates, quartz, and calcite, while the mouth of the surrounding streams contained sandy sediments and high organic matter content. The analysis also revealed high levels of metals in the study area, possibly originating from municipal wastewater discharges and agricultural fields.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
Huanjun Zhang, Liu Yang, Yi Li, Chao Wang, Wenlong Zhang, Longfei Wang, Lihua Niu
Summary: The study reveals that severe pollution reduces microbial diversity and network complexity, potentially leading to community instability. Competition for nutrients among copiotrophic bacteria may be enhanced as pollution levels increase. Unique keystone taxa in the severe pollution group may contribute to photosynthesis and pollutant degradation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)