Article
Environmental Sciences
Jiumei Wang, Jiwen Ge, Xiaojing Yang, Dandan Cheng, Chenhao Yuan, Ziwei Liu, Shiyu Yang, Yan Guo, Yansheng Gu
Summary: The rapid development of modern society has led to the discharge of large quantities of heavy metals into wetlands, resulting in severe pollution. This study analyzed the heavy metal pollution in the Dajiuhu wetland, revealing variations in pollution levels and risks among different lakes, and identifying potential sources of the heavy metals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Zheng Li, Zhenghui Fu, Shuhang Wang, Yang Zhang, Jinbo Zhang, Yanxiao Liu, Huaicheng Guo, Pingjian Yang
Summary: This study conducted an ecological and human health risk assessment of metals and heavy metals in Qinghai Lake, the largest inland saltwater lake in China. The concentration, distribution, and source of these metals were investigated. It was found that the metals in the sediments of Qinghai Lake mainly came from five rivers entering the lake, with copper and zinc showing the highest enrichment capacity. The results of the risk assessment indicated low ecological risks and no threat to human health from the heavy metals in the lake's sediments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Multidisciplinary Sciences
Yangyang Han, Hongjie Wang, Guangming Zhang, Shengqi Zhang, Xingchun Liu, Ling Liu
Summary: This study conducted an experiment to analyze soil pollutants in different land-use types (farmland, lake, and ditch) in Zaozhadian Lake, North China Plain. The results showed that farmland had higher heavy metal contents, while lake sediments had higher levels of nitrogen and organic matter. The ecological risk was low in all land-use types, and the primary pollutants were from agricultural and industrial sources, as well as natural sources. Land-use type changes had an impact on the distribution and concentrations of pollutants.
Article
Environmental Sciences
Hui Zheng, Qiang Ren, Kaixuan Zheng, Zhikai Qin, Yangyang Wang, Yuguang Wang
Summary: The study collected 74 surface sediment samples from the Arctic Ocean and Bering Sea to analyze the content of metal(loid)s (As, Cu, Cd, Ni, Pb, Zn and Cr) and their relationship with pH and watersoluble organic carbon content. The results showed that most of the metal(loid)s hotspots were found in the Beaufort Sea region, with Cd being the most contaminated metal. The ecological risk assessment revealed low risks for As, Cu, Ni, Pb, Zn and Cr, except for Cd.
MARINE POLLUTION BULLETIN
(2022)
Article
Engineering, Environmental
Tong Zheng, Chenyuan Dang, Sining Zhong, Weiling Sun, Qian Chen
Summary: The study found that metal(loids) concentrations in the Danjiangkou Reservoir were lower than drinking water quality standards in China, with their distribution in water mainly controlled by factors such as total organic carbon, sulfate, temperature, and total phosphorus. In sediments, metal(loids) distribution was influenced by organic carbon, total phosphorus, and ammonia nitrogen. Risk assessment results indicated minor to moderate pollution in the reservoir sediments, with Sb and Cd posing the highest potential ecological risk.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)
Article
Environmental Sciences
Anam Ashraf, Amina Khalid, Ibadullah Khan, Zhang Yuke, Chen Zhigang, Tian Zhaoxue, Felipe Leite, Liu Xuehua
Summary: Dongzhangwu Wetland in Hebei, China, provides breeding and foraging grounds for migratory water birds. The study investigated heavy metal concentrations in water, soil, and food and identified chromium, lead, copper, zinc, and arsenic as priority pollutants. A management plan is needed to improve wetland functioning and ecological services.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Ulaganathan Arisekar, Robinson Jeya Shakila, Rajendren Shalini, Geevartnam Jeyasekaran, Muruganantham Keerthana, Natarajan Arumugam, Abdulrahman Almansour, Karthikeyan Perumal
Summary: The Thamirabharani river is contaminated with high concentrations of heavy metals, especially in the estuarine region. This poses a moderate ecological risk to the marine ecosystem. Therefore, stringent monitoring measures need to be implemented by the relevant regulatory authorities.
Article
Environmental Sciences
Thuy Minh Le, Chi Linh Thi Pham, Ha My Nu Nguyen, Thi Thuy Duong, Thi Phuong Quynh Le, Dong Thanh Nguyen, Nam Duc Vu, Tu Binh Minh, Tri Manh Tran
Summary: This study investigated the pollution status and distribution characteristics of ten typical phthalic acid esters (PAEs) in sediment samples collected from three rivers in Northern Vietnam. The results showed that DEHP was present at the highest levels in all samples, while DMP, DEP, and DPP were detected at lower frequencies and concentrations. Significant correlations were found between the median-chain PAEs in sediment samples, and the median-chain PAEs had a higher ecological risk than the short-chain PAEs.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Partho Banik, M. Belal Hossain, As-Ad Ujjaman Nur, Tasrina Rabia Choudhury, Samia Islam Liba, Jimmy Yu, Md. Abu Noman, Jun Sun
Summary: This study provides a description of the occurrence and distribution of microplastics in the sediment of Kuakata beach in Bangladesh. The results show a high abundance of microplastics, with fibers as the dominant type. The abundance of microplastics is positively correlated with the finer grain size of the sediment. The beach sediment of Kuakata is categorized as high ecological risk according to the pollution load index.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Chemical
Zaiwang Zhang, Jianchao Jin, Jiqiang Zhang, Deyong Zhao, He Li, Changping Yang, Yingbang Huang
Summary: This study investigated heavy metal pollution in surface sediments of Shantou Bay in South China, finding significant improvement in sediment quality and moderate pollution levels. Attention should be given to the pollution of Cd.
Article
Environmental Sciences
Kewei Zhao, Kunshan Bao, Ying Yan, Bigyan Neupane, Changjun Gao
Summary: Global mangrove wetlands are increasingly impacted by human activities along the coast. This study focuses on the Zhanjiang mangrove wetland, the largest wetland adjacent to a highly developed bay area in China. Surface sediments were collected from different plant communities and analyzed for potentially harmful trace elements (PHTEs). The results show that most PHTEs were slightly enriched, with significant pollution of cadmium (Cd) and moderate potential ecological risk. The risk of the mangrove wetland is higher compared to grassland and farmland. The source of PHTEs is mainly attributed to local anthropogenic activities for mercury (Hg), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), and lead (Pb), natural geological processes for chromium (Cr), and atmospheric deposition of regional industrial pollution for Cd. The findings highlight the need for stricter implementation of wetland protection laws to achieve ecological civilization. This study provides valuable insights for wetland conservation and management in coastal cities.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Rui Min, Kai Ma, Hongwei Zhang, Jiaqian Zhang, Siyi Yang, Tianhong Zhou, Guozhen Zhang
Summary: This study systematically investigated the distribution of microplastics (MPSs) in the surface water and bank sediments of Liujiaxia Reservoir in the upper Yellow River for the first time. The results showed that the main types of MPSs in the reservoir were PET, PS, and PP, and the abundance ranged from 4.48 to 12.09 item/L in the surface water and from 447.27 to 1543.80 item/kg (dry weight) in the bank sediments. The study provides valuable data for future pollution control and management in the reservoir area.
Article
Biodiversity Conservation
Siddhant Dash, Smitom Swapna Borah, Ajay S. Kalamdhad
Summary: This study aimed to evaluate sediment pollution loadings and ecological risks, with three objectives. Through hierarchical clustering and principal component analysis, it was found that wetlands are most affected during the post-monsoon season, with most sites falling under moderate risk category. Cd was identified as the primary contributor to ecological risk. Chemical speciation analyses revealed different heavy metals' availability forms in sediment, highlighting the negative impact of Cr, Mn, and Mg on aquatic ecology.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Shumin Fang, Zhaotong Fang, Chunyu Hua, Mengyuan Zhu, Yueru Tian, Xian Yong, Jiaying Yang, Lijun Ren
Summary: This study evaluated the risk of heavy metals in river sediment by analyzing sediment samples from Xiaoqing River. It found that Hg and Cd pose high ecological risks, while other heavy metals have low risks. The study also analyzed the correlation and sources of different heavy metals, providing valuable insights for preventing heavy metal pollution and promoting sustainable urban development.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Ali Coskun, Bilgehan Yabgu Horasan, Alican Ozturk
Summary: The northeast of Konya is an important center for agriculture and animal husbandry, but heavy metal accumulation has become an environmental issue in the region. Exposure to toxic metals can lead to health complications for humans and animals. Studying the metal content and indices in stream sediments can provide insight into soil quality and environmental safety.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Yuan Liu, Kai Zhang, Shaopeng Xu, Meng Yan, Danyang Tao, Luoluo Chen, Yong Wei, Chenxi Wu, Guijian Liu, Paul K. S. Lam
Summary: In this study, the adsorption mechanisms and composite risks of heavy metals adhered to microplastic surfaces were investigated. The results showed that heavy metals in the plastisphere were influenced by the surrounding matrices and some heavy metals were positively correlated with the specific surface area of the microplastics. Cluster analysis indicated that some heavy metals were derived from anthropogenic sources, suggesting that plastics can adsorb adventive heavy metals. A new composite risk assessment method for heavy metals and microplastics was also established.
Article
Environmental Sciences
Yong Wan, Xin Chen, Qian Liu, Hongjuan Hu, Chenxi Wu, Qiang Xue
Summary: This study investigates the characteristics of microplastic pollution in an informal landfill in South China. The results indicate that a large amount of microplastics are present in the landfill refuse and underlying soil, with most of them being fibrous, small sized, and transparent. The microplastics detected in the landfill leachate and groundwater are even smaller and more diverse in polymer types. The study demonstrates that microplastics from informal landfills can leak out to the surrounding environment.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Shaopeng Xu, Luoluo Chen, Kai Zhang, Yaru Cao, Yue Ma, Hoi Shan Chau, Danyang Tao, Chenxi Wu, Chengtao Li, Paul K. S. Lam
Summary: Microplastics (MPs) have been found to be widely present in the northern South China Sea, with polyethylene terephthalate fibers being the dominant polymer. Although the abundance of MPs in the South China Sea is relatively high, it is lower compared to other Chinese coastal areas. There was no statistically significant correlation between the abundances of MPs in seawater and sediment, and the distribution of MPs in surface water influenced by monsoons showed higher abundance in the east and lower in the west.
Article
Environmental Sciences
Xiong Xiong, Tyler H. Tappenbeck, Chenxi Wu, James J. Elser
Summary: The study assessed the presence of microplastics in Flathead Lake and found that the concentrations were similar to other lakes in less populated areas worldwide. The research also suggested that precipitation might enhance the deposition of microplastics.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Civil
Chang Pu, Junwu Xiong, Ruichao Zhao, Jingjing Fang, Yuan Liao, Qi Song, Jiaquan Zhang, Yuan Zhang, Huafeng Liu, Wei Liu, Wei Chen, Hong Zhou, Shihua Qi
Summary: This study investigated the distribution, possible sources, and potential health risks of polycyclic aromatic hydrocarbons (PAHs) in surface soils of karstic valleys and hilltop depressions in the Yichang area on the south bank of the Yangtze River. The results showed low concentrations of PAHs in the surface soils, primarily derived from biomass and coal combustion.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Ya Zhang, Kang Wang, Weizhi Chen, Yong Ba, Kifayatullah Khan, Wei Chen, Chen Tu, Changer Chen, Li Xu
Summary: The study investigated microplastic pollution in different land use types in Yuanmou County, Yunnan Province, revealing significant differences in the abundance and characteristics of microplastics among different land uses. This may be attributed to various pollution sources and the weathering degree of microplastics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Ying Liu, Yao Mao, Jun Xu, Wenmin Chen, Tianpeng Hu, Chengyan Xu, Weijie Liu, Chengkai Qu, Wei Chen, Jiaquan Zhang, Xinli Xing, Shihua Qi
Summary: This study collected and analyzed atmospheric dustfall samples from libraries and dormitories in 14 universities in Wuhan, China, to investigate the levels and sources of polycyclic aromatic hydrocarbons (PAHs). The results showed that PAHs contamination was higher in areas with high population density and heavy traffic, indicating the contribution of anthropogenic activities to PAHs emissions. The study also assessed the potential health risks of PAHs in the university environment.
Article
Environmental Sciences
Jun Guo, Zhiying Wei, Chao Zhang, Cong Li, Liangliang Dai, Xin Lu, Kaiqi Xiao, Xiong Mao, Xiuwen Yang, Yiming Jing, Jiaquan Zhang, Wei Chen, Shihua Qi
Summary: Contamination of heavy metals, especially cadmium (Cd), in agricultural soils is a growing issue that poses a threat to crop safety and human health. In this study, agricultural products and corresponding rhizosphere soils from the East edge of the Dongting Lake were collected and analyzed for Cd concentrations. The technique of diffusive gradients in thin-films (DGT) was used to evaluate the bioavailability of Cd in the rhizosphere soils. The results showed that total Cd concentrations in the soil cannot predict the concentrations in agricultural products, but the DGT technique has good potential for predicting Cd bioavailability in soil and assessing the safety of agricultural products.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2023)
Article
Chemistry, Multidisciplinary
Wenmin Chen, Xihao Zhang, Jiaquan Zhang, Ning Duan, Xiangyi Gong, Shan Liu, Changlin Zhan, Wei Chen, Xinli Xing
Summary: This study investigated the contamination characteristics and potential health implications of heavy metals in road dust in a typical county in central China. The results showed that heavy metal pollution in road dust mainly comes from traffic activities, industrial production activities, building pollution, and the natural environment. The non-carcinogenic and carcinogenic risks to children and adults were within safe ranges.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Shenghua Hu, Xiaofei Chen, Xiaolong Huang, Chenxi Wu
Summary: Degradation of lake ecosystem is a common issue worldwide, and it is crucial to remediate degraded lakes to ensure water safety and ecosystem health. Restoring submerged macrophyte has been recognized as an important measure, but its contribution to overall ecological remediation is limited. Fish manipulation, which can improve water quality and promote submerged macrophyte restoration, is often overlooked in ecological remediation projects. Future studies should focus on understanding the role of fish in lake nutrient cycle and their impact on submerged macrophyte, in order to guide fish manipulation for effective remediation of shallow lakes. It is suggested that fish manipulation measures should be considered in more ecological remediation projects globally.
Article
Marine & Freshwater Biology
Yuling Chen, Ming Duan, Xiangrong Xu, Chenxi Wu
Summary: Microplastics, as emerging contaminants, exhibit different composition features in the environment. The influence of polymer types on their toxicity remains unclear, affecting the evaluation of their toxicity and ecological risks. This study investigated the toxic effects of microplastics with different polymer types on zebrafish through acute embryo and chronic larvae tests. The results showed that microplastics had negligible toxicity at environmental relevant concentrations, but had similar toxic effects as SiO2 at high concentrations.
AQUATIC TOXICOLOGY
(2023)
Article
Engineering, Environmental
Jia Jia, Qian Liu, Chenxi Wu
Summary: This study found that bacteria from different sources, polylactic acid microplastics, and florfenicol had positive effects on the growth of C. pyrenoidosa and increased its chlorophyll content. The presence of these bacteria in the phycosphere was significantly influenced by their sources and the addition of polylactic acid microplastics and florfenicol. Moreover, polylactic acid microplastics and florfenicol also promoted the abundance of phenicol-related antibiotic resistance genes in the phycosphere, indicating that exogenous pollutants can facilitate the spread of antibiotic resistance genes in the environment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Yang Ding, Shihua Qi, Huanfang Huang, Yuan Zhang, Huang Zheng, Yun Qin, Qian Bao, Wei Chen, Chengkai Qu
Summary: Lake sediments on the Tibetan Plateau reveal the impact of climate change and pollution emissions, with less influence from westerly air mass flow compared to the monsoon.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Wenwen Chen, Shengyang Li, Huanfang Huang, Yingjie Chen, Wei Chen, Yang Ding, Xiaoyu Yan, Yanpeng Liang, Kuang Cen, Shihua Qi
Summary: The study investigated the distribution of eight species of N-nitrosamines in river water, groundwater, and tap water in the Pearl River Delta, China. Among the N-nitrosamines, NDMA, NDEA, NDBA were found in high concentrations, with industrial and domestic wastewater identified as the primary sources. The presence of N-nitrosamines in groundwater and tap water poses significant potential cancer risks to residents, especially children, and advanced water treatment and control measures are necessary.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Xin Chen, Yong Wan, Jia Jia, Xue Qiang, Chenxi Wu
Summary: The contamination of groundwater by microplastics has gained attention due to its potential risks, but the migration behavior of microplastics in groundwater can be influenced by various factors, such as size, shape, and type.
