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
Solomon Felix Dan, Enobong Charles Udoh, Jiaodi Zhou, Buddhi Wijesiri, Shuai Ding, Bin Yang, Dongliang Lu, Qianqian Wang
Summary: This study investigated the speciation of heavy metals in surface sediments of the Cross River Estuary in Nigeria. The results showed that some heavy metals had potential bioavailability and were influenced by factors such as sedimentary organic carbon, pH, and salinity. Cd was found to be the most polluted heavy metal.
MARINE POLLUTION BULLETIN
(2022)
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
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
Lorena S. Miranda, Kaveh Deilami, Godwin A. Ayoko, Prasanna Egodawatta, Ashantha Goonetilleke
Summary: This study found that the influence of land use and configuration on metal partitioning is independent of scale, and population density increases metal bioavailability at the riparian scale. Agricultural lands discharge the highest fractions of dissolved metals at both spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
K. K. Jayasooryan, E. V. Ramasamy, P. K. Chandini, Mahesh Mohan
Summary: This study revealed high mobility of heavy metals in the Cochin estuary, with high exchangeable fractions of Zn and Cd, and the risk of bioaccumulation posed by the oxidisable and reducible fractions of Pb.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Environmental Sciences
Haifang Huang, Bin Yang, Zhiming Ning, Shengkang Liang, Zhenjun Kang, Dongliang Lu, Jiaodi Zhou, Hu Huang, Solomon Felix Dan
Summary: The study investigated the relationship between sedimentary nutrients and poorly-bound heavy metals in the Dafengjiang River Estuary and adjacent Sanniang bay. Results showed significant positive correlations between sedimentary nutrients, water column chlorophyll-a, and poorly-bound heavy metals. The study suggests that the remobilization of poorly-bound heavy metals in surface sediments enriched by labile organic matter can enhanced nutrient availability.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Geochemistry & Geophysics
Michele Arienzo, Marco Trifuoggi, Luciano Ferrara, Carlo Donadio, Priyanka Mondal, Jonathan Muthuswamy Ponniah, Santosh Kumar Sarkar, Maria Toscanesi
Summary: This study investigated the impact of the monsoon season on heavy metal loads in the sediments of the Hooghly River in India from 2014 to 2017, a previously unexplored time frame. The results revealed significant correlations between certain metals, suggesting contributions from industrial activity. The monsoon season was found to significantly increase the transport of metals, mainly due to weathering of continental detritus. The levels of certain metals, especially nickel, posed a significant threat to the aquatic ecosystem.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2023)
Article
Environmental Sciences
Reyhane Madadi, Fatemeh Kachoueiyan, Gabriel Enrique De-la-Torre
Summary: This study demonstrates the influence of redox potential (Eh) on the binding forms of heavy metal elements in marine sediments, which has implications for water quality and ecological health.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Environmental
Jian Zhao, Xinjie Wang, Son A. Hoang, Nanthi S. Bolan, M. B. Kirkham, Jingnan Liu, Xinghui Xia, Yang Li
Summary: This review discusses the chemical transformations of silver nanoparticles (AgNPs) in sediments, which can mitigate their toxicity and affect organisms in sediments, transferring through the food web. Further research using novel techniques and mathematical models is needed to investigate diverse chemical transformations in various sediments.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Ecology
M. B. Binish, N. S. Magesh, S. Sruthy, V. M. Kannan, Mahesh Mohan
Summary: This study evaluates the ecological risk and impact of anthropogenic activities in the Cochin estuary, a Ramsar site, by analyzing trace metal indices in surface sediment. The concentrations of various trace metals and their spatial and temporal variations are recorded. Pollution indices are applied to assess sediment quality. Higher concentrations of certain trace metals are found in the northern arm of the estuary and near industrial regions, indicating non-geogenic inputs. The results reveal higher levels of trace metals in the northern part of the Cochin Estuary, potentially due to weak flow and industrial effluent input.
REGIONAL STUDIES IN MARINE SCIENCE
(2023)
Review
Environmental Sciences
Heera Lee, Clare Morrison, Nicholas J. C. Doriean, David T. Welsh, William W. Bennett
Summary: Seagrasses play a crucial role in coastal ecosystems but are currently facing increasing threats from human activities. They can effectively capture suspended sediment and alter sediment characteristics, leading to higher concentrations of trace metals. This systematic review identified research trends and knowledge gaps in the relationships between metals and seagrasses. The review showed that further research is needed to better understand the role of seagrasses in the distribution, immobilization, and release of trace metals in coastal ecosystems.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Laura Ferrans, Yahya Jani, Juris Burlakovs, Maris Klavins, William Hogland
Summary: This study investigates the speciation of metals in sediments from Malmfjarden bay, Sweden, and assesses the potential risk of metal pollution during dredging and using dredged sediments. The results show low pollution risk for Cr, Ni, and Fe during dredging activities, and medium risk for Pb and Zn. Overall, the investigated metals in Malmfjarden sediments are found to pose low risks of spreading during beneficial uses.
Article
Ecology
Sanhita Swain, Asim Amitav Pattanayak, Biraja Kumar Sahu, Deepty Ranjan Satapathy, Chitta Ranjan Panda
Summary: The Mahanadi estuary in eastern India is highly vulnerable to pollution from various industries along its bank. A study on heavy metal contamination in surface sediment showed significant seasonal variations, with Cd potentially causing occasional biological effects. Pollution indices indicated contamination by Pb and Cd from external sources, while other metals did not pose significant contamination risks in the sediment.
REGIONAL STUDIES IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Changsheng Jin, Zhongwu Li, Mei Huang, Xiang Ding, Mi Zhou, Changqing Cai, Jia Chen
Summary: Cd immobilization in lake sediment was effectively achieved by using Mn oxides as amendments. The treatment with synthesized Mn oxides significantly reduced the leachable and extractable Cd in the sediment, and transformed the acid-soluble fraction of Cd to a residual fraction. The pH and oxidation-reduction potential of the sediment played important roles in the bioavailability of Cd during the remediation process. The interaction between the amendment and Cd mainly involved complexation, ion-exchange, and precipitation. These findings provide insights and methods for the improved restoration of heavy metal-contaminated sediment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)