Article
Environmental Sciences
Rongwei Xiong, Yong Li, Xiufang Gao, Yan Xue, Jinquan Huang, Na Li, Cheng Chen, Ming Chen
Summary: This study investigated the variation of heavy metals in a constructed wetland that has been operating for 14 years. The results showed that the sediments of the wetland acted as a sink for heavy metals, with concentrations decreasing along the flow direction. The two common wetland plants exhibited different enrichment performances of heavy metals, and were suitable for phytostabilization. Sediment organic matter was identified as the primary factor affecting the distribution and migration of heavy metals in the wetland system.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yunpeng Lin, Yunhai Li, Liang Wang, Binxin Zheng, Xijie Yin, Yonghang Xu
Summary: The study shows that after the typhoon, the salinity in Quanzhou Bay decreased, while the concentrations of heavy metals increased, mainly from natural sources. Sediments were found to be an important source of heavy metals in suspended particles under the influence of the typhoon.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Hao Xu, Huahong Yang, Qiyun Ge, Zhenyi Jiang, Yang Wu, Yamei Yu, Deming Han, Jinping Cheng
Summary: The study reveals that the coastal ecosystem in the northern Hangzhou Bay is facing increasing heavy metal contamination due to anthropogenic activities. While the seawater showed decreasing concentrations of Cu, Pb, Zn, Cd, and Hg but increasing concentrations of As, sediments demonstrated rising levels of heavy metals, except for Hg. The potential ecological risk, mostly attributed to Cd and Hg, was low in general but reached moderate levels in some years, emphasizing the need for ongoing monitoring of heavy metal pollution in the area.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Weimin Yao, Chengye Hu, Xiaolong Yang, Bonian Shui
Summary: This study assessed spatial variations and potential risks of heavy metals in sediments of Yueqing Bay by examining the relationship between metal concentrations and sediment physiochemical factors. Higher sediment metal concentrations were found in the inner bay compared to the central and outer bay, with some metals posing moderate ecological risks. Multivariate statistical analysis suggested that sediment texture, total organic carbon, and petroleum hydrocarbons had a significant influence on the distribution and fate of metals.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Hui Zhang, Shengfa Liu, Lina Ai, Peng Cao, Kaikai Wu, Jingjing Cui, Hongmin Wang, Che Abd Rahim Mohamed, Xuefa Shi
Summary: This study investigated the distribution, controlling factors, environmental quality, and primary sources of heavy metal elements in surface sediments from the Malacca Strait. Results showed that heavy metal elements were abundantly distributed near the coast of Malaysia, gradually decreasing toward the sea, and increasing in waters close to the Perak estuary. Natural weathering was the main source of heavy metals, while some were affected by human activities. The assessment of environmental quality revealed pollution-free levels for certain heavy metal elements, moderate pollution for others, and high ecological risk for Hg and high-risk index for As elements.
MARINE POLLUTION BULLETIN
(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
Cong Bao, Bei Huang, Junbo Shao, Qiang Cai, Qinglin Mu, A. J. Murk
Summary: The study evaluated the development of toxic compounds in sediment and macrobenthos species in Hangzhou bay, finding that some metal elements exceeded Chinese sediment quality guidelines, posing ecological and seafood risks. The number of benthic species showed a decreasing trend, with fewer species sensitive to contamination, while crustacea species were more tolerant to pollution.
MARINE POLLUTION BULLETIN
(2021)
Article
Engineering, Chemical
Changping Yang, Gang Yu, Yan Liu, Binbin Shan, Liangming Wang, Dianrong Sun, Yingbang Huang
Summary: This study analyzed six heavy metals in surface sediments from the coastal Pearl Bay to assess their distribution patterns and potential ecological risks. Results showed that the coastal Pearl Bay was not polluted by the examined metals except for Cd, which might cause contamination and ecological risk. Further research is recommended to investigate the acute source and transferring mechanisms of Cd.
Article
Environmental Sciences
Chunyan Yu, Weina Sui, Bin Liang, Chenguang Bao, Minghui Ma
Summary: The sediment status of Bohai Bay was evaluated for the presence of several heavy metals from 1978 to 2017. While the overall levels were below category I standards, some stations showed concentrations of copper, chromium, and arsenic that fell between threshold effect levels and probable effect levels, potentially leading to negative ecological effects. The Chinese Government is advised to monitor and control major risk factors such as cadmium, copper, chromium, and arsenic.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Environmental Sciences
Qin Shu, Ruijing Li, Haibo Zhang, Lisha Wang, Qingtao Guan, Guangke Wei, Yunfeng Xu, Shuaichen Jin, Hui Gao, Guangshui Na
Summary: This study aimed to investigate the spatial and media distribution patterns of antibiotic resistance genes (ARGs) in Jiaozhou Bay, as well as the reasons behind these patterns. The results revealed that aminoglycoside and MLSB resistant genes predominated in all samples, with ARGs' relative abundance ranging from 10-6 to 10-2, 10-6 to 10-3, and 10-5 to 10-2 copies/16S rRNA in coastal water, bay water, and sediments, respectively. The significant spatial variation of ARGs was explained by the susceptibility of coastal water to human activities, while environmental physicochemical factors played a crucial role in bay water. The distribution variation between media was attributed to different assembly processes and the influence of environmental factors and heavy metals in water and sediments, respectively.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Hui Zhang, Shengfa Liu, Kaikai Wu, Jingjing Cui, Aimei Zhu, Ying Zhang, Che Abd Rahim Mohamed, Xuefa Shi
Summary: The study analyzed the heavy metal contents of surface sediment samples from the western Sunda Shelf, revealing high enrichment regions of heavy metals controlled by riverine inputs and hydrodynamic conditions. Overall, the study area was not significantly contaminated, but moderate contamination levels of Cd, As, and Hg were found in certain areas due to anthropogenic activities.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Huan-Zhan Zhou, Jun-Feng Wang, Hui-Min Jiang, Ze-Xiang Cai, Guan-Hui Tang, Song Ding, Sheng-Teng Liu, Zhi-Min Xu
Summary: The restoration of mangrove in coastal wetlands of China started in the 1990s, but the presence of heavy metals in wastewater poses a significant risk to the restoration process. This study evaluated the distribution and ecological risk of heavy metals in sediment samples from five mangrove wetlands in the Greater Bay Area. Cadmium (Cd) was found in high concentrations in the exchangeable fraction, while Copper (Cu), Zinc (Zn), Chromium (Cr), Lead (Pb), and Nickel (Ni) mainly presented in the residual fraction. Sediment Cd showed high pollution levels, while Zn and Cu had moderate pollution levels. The sediments also showed a high ecological risk for Cd. The content of NO3--N was closely related to the heavy metal content in sediments, and pH value and NO3--N concentration affected the distribution of heavy metal fractions. Industrial discharge in certain areas led to higher levels of heavy metal pollution, but strict drainage standards in Shenzhen helped decrease heavy metal contents in mangrove sediments. Therefore, future mangrove conversion and restoration should be connected to water purification efforts in the Greater Bay Area.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yuki Ota, Atsushi Suzuki, Kyoko Yamaoka, Masayuki Nagao, Yuichiro Tanaka, Toshiaki Irizuki, Osamu Fujiwara, Kaoru Yoshioka, Shungo Kawagata, Shigenori Kawano, Osamu Nishimura
Summary: The study on heavy metal pollution in Matsushima Bay, Japan, revealed that the accumulation of heavy metals in marine sediments was influenced by multiple factors such as mega-tsunami, anthropogenic activities, and redox conditions. Different levels of enrichment of various heavy metals were found in sediments at different years and locations, highlighting the complexity of heavy metal contamination in coastal areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Weili Wang, Ronggen Jiang, Cai Lin, Lingqing Wang, Yang Liu, Hui Lin
Summary: In this study, the spatial distribution, pollution degree, ecological toxicity and possible sources of seven potentially toxic elements (PTEs) collected from the surface sediments of Quanzhou Bay (QZB) were analyzed. The results indicated that Cd and Hg were the main elements posing ecological risk among the PTEs of sediments in QZB, with Cd pollution degree ranging from slight to serious. Natural sources, industrial emissions, and the combustion of fossil fuels were identified as the main sources for PTEs in the surface sediments of QZB.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Yongshan Chen, Yue Lu, Jinghua Xu, Ying Feng, Xiaofeng Li
Summary: This study found that multiple residual antibiotics in coastal areas could cause fundamental shifts in microbial community and their associated antibiotic resistance genes.
MARINE POLLUTION BULLETIN
(2023)
