Article
Environmental Sciences
Melissa M. Baustian, Camille L. Stagg, Carey L. Perry, Leland C. Moss, Tim J. B. Carruthers
Summary: Coastal marshes in Louisiana play a significant role in soil carbon accumulation and burial, affecting the global carbon budget. Saline marshes have lower total carbon density and accumulation rates compared to other marsh habitats. The total carbon burial rate in Louisiana in 2013 was estimated at 4.3 Tg TC yr(-1), with a potential significant impact on the global carbon budget if wetland loss continues.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Public, Environmental & Occupational Health
Lathadevi K. K. Chintapenta, Katharine I. I. Ommanney, Gulnihal Ozbay
Summary: Human activities in wetlands and seasonal changes can affect the concentrations of heavy metals in soil and the types of marsh vegetation. The study found that different types of wetland vegetation and the ion composition of the soil can influence the levels of heavy metals.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Esther Lee, Joshua M. Epstein, Matthew J. Cohen
Summary: Depressional wetlands play a crucial role in wetland landscapes by storing and releasing water, providing habitat, and influencing carbon and nutrient cycling. The frequency and importance of surface connectivity in these wetlands is poorly understood, but our research shows that it is vital for the export of water-borne materials and numerous hydrologic and habitat services. Understanding and quantifying this surface connectivity is essential for evaluating the restoration of wetland landscape functions.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Sina Zarei, Abdolreza Karbassi, Masoud Sadrinasab, Amin Sarang
Summary: This study measured the pollution and bioavailability of heavy metals in the sediments of Anzali Wetland, identifying that Zn, Cr, Cu, Pb, Ni, and As were mainly from natural sources, while Cd and Hg were influenced by non-oil organic sources and atmospheric deposition, respectively.
MARINE POLLUTION BULLETIN
(2023)
Article
Green & Sustainable Science & Technology
Bernardo A. Bastien-Olvera, David Batker, Jared Soares, John Day, Luke Boutwell, Tania Briceno
Summary: Despite increased hurricane intensity, the U.S. Gulf of Mexico coast has experienced population growth, but areas with wetland loss in coastal Louisiana have witnessed population declines. Wetland loss has a significant and persistent negative effect on population growth in coastal Louisiana, with an average reduction of approximately 1000 persons for every hectare lost.
Article
Environmental Sciences
Hanbiao Xian, Xuhui Dong, Yu Wang, Yan Li, Jinhuai Xing, Erik Jeppesen
Summary: Establishing geochemical baselines and assessing heavy metal pollution in lagoon sediments are crucial for coastal zone environmental management. The study found that copper and cadmium were the predominant pollution metals in surface sediments of Pinging Lagoon, indicating its strong self-cleaning capacity.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Zhenyan Wang, Qiao Su, Shu Wang, Zongjun Gao, Jiutan Liu
Summary: The study revealed that heavy metal concentrations in groundwater in the Jiangsu Coastal Zone are mainly attributed to industrial pollution, seawater intrusion, and mineral dissolution. Particularly, high levels of B and As were found, exceeding standard limits and posing significant health risks.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Ryan Greenplate, Serge Thomas, Ashley Danley-Thomson, Thomas M. Missimer
Summary: Remediation of heavy metals is a complex and expensive task, which often involves transferring the problem to another location. However, using bioremediation, the metals can be sequestered into the wood of plants for long-term storage. A study on a species of willow tree (Salix caroliniana) found that it has the potential for bioremediation of mercury, accumulating higher levels in the wood compared to its leaves. The low concentration of mercury in the wood was attributed to the pristine or low soil concentrations of mercury where the sampled trees were located.
Article
Environmental Sciences
Nhu Da Le, Thi Thu Ha Hoang, Vu Phong Phung, Thi Lien Nguyen, Emma Rochelle-Newall, Thi Thuy Duong, Thi Mai Huong Pham, Thi Xuan Binh Phung, Tien Dat Nguyen, Phuong Thu Le, Le Anh Pham, Thi Anh Huong Nguyen, Thi Phuong Quynh Le
Summary: Coastal aquaculture plays an important role in the local economy, but water quality issues in coastal regions threaten its sustainability. This study analyzed the concentrations of seven heavy metals in surface seawater and wastewater in the Red River coastal aquaculture zone from 2019 to 2020. The results showed that the concentrations of heavy metals in seawater were generally below the regulatory limits, although some isolated samples had high individual concentrations. Only the concentration of arsenic in wastewater exceeded the regulatory limit for surface water quality. The analysis also revealed that the sources of heavy metals in seawater were from various activities and natural conditions. The overall ecological risk index in the Red River coastal zone was in the low range. These findings provide a scientific basis for better management of the coastal environment and the sustainable development of the aquaculture industry in the area.
Article
Environmental Sciences
Tao Zhang, Pei Wang, Mingguo Wang, Jinwei Liu, Lei Gong, Shibin Xia
Summary: This study focused on riparian soils in the lower sections of the Lhasa River to examine the characteristics and sources of heavy metals in high-cold regions. The research found that the topsoil was more polluted than the deep soil, with Cd being the primary contributor to overall contamination. The study identified five sources for the six heavy metals and concluded that the heavy metals in the riparian soil pose no harm to human health. Monitoring of these heavy metals is important to ensure their safe utilization.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Shirin Yavar Ashayeri, Behnam Keshavarzi, Farid Moore, Azam Ahmadi, Peter S. Hooda
Summary: In this study, thirty sediment samples were collected from the Gohar Rood River in Iran to evaluate the levels of different elements and their potential environmental risks. Using ICP-MS analysis, fifteen elements were measured, and it was found that chromium concentrations exceeded the Severe Effect Level (SEL) at all sampling sites. Zinc, manganese, cobalt, and chromium showed moderate contamination based on pollution index, modified pollution index, and enrichment factor. The modified hazard quotient indicated varying degrees of pollution severity for some elements. Regression analysis revealed that agricultural runoff, domestic, and municipal sewage were the main sources of zinc, copper, lead, antimony, and molybdenum in the riverine sediment. Additionally, the BCR fractionation scheme indicated medium to high risks to the local environment from manganese, cobalt, and zinc.
MARINE POLLUTION BULLETIN
(2023)
Article
Public, Environmental & Occupational Health
Ebtessam Hamid, Khoshnaz Payandeh, Mohammad Tahsin Karimi Nezhad, Naghmeh Saadati
Summary: Heavy metal pollution poses significant risks to animals, the environment, and human health. This study investigated the potential ecological risk of heavy metals in the coastal soils of southwest Iran in 2019. The results indicated that zinc, copper, cobalt, manganese, selenium, and molybdenum were low-risk contaminants in this region. Agricultural, industrial, and human activities were found to be major contributors to the accumulation of certain heavy metals in the soil.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Xin Ni, Guangming Zhao, Siyuan Ye, Guangxue Li, Hongming Yuan, Lei He, Dapeng Su, Xigui Ding, Liujuan Xie, Shaofeng Pei, Edward A. Laws
Summary: The study used positive matrix factorization (PMF) and a GeoDetector model to assess the sources and ecological risks of heavy metal contamination in the Yancheng Coastal Wetland. Wetland environments were found to have a strong ability to sequester heavy metals, with parent soil material, agriculture, and industrial pollutants identified as the main sources. The ecological harm of heavy metal exposure was minimal, except for Cd and Hg, which were primarily caused by vehicle emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Vhahangwele Matodzi, Malebogo Andrew Legodi, Nikita Tawanda Tavengwa
Summary: This study assessed the levels of zinc, chromium and lead in the Mvudi River in South Africa, finding that plants absorbed higher concentrations of metals compared to water samples. Wetland plants play an important role in accumulating heavy metals in contaminated water.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2021)
Article
Environmental Sciences
Junyong Ma, Zhenzhen Hao, Yibo Sun, Bo Liu, Wenjie Jing, Jiaqiang Du, Junsheng Li
Summary: Ecosystem changes caused by climate changes have a chain reaction on water, soils, and plants. Heavy metals have unique impacts on the composition and function of soils and plants. Most studies are focused on contaminated areas, and more research is needed in protected nature reserves undergoing ecological transition.
JOURNAL OF SOILS AND SEDIMENTS
(2022)