Article
Environmental Sciences
Wagner Pereira dos Santos, Raquel Franco de Souza, Vinicius Nogueira da Silva, Thiago Farias Nobrega
Summary: By analyzing the distribution of heavy metals in sediment samples through sequential extraction procedure, this study found that copper and chromium were most closely related to the mortality of H. azteca, while cadmium and nickel showed less correlation.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Environmental Studies
Theodora Bousdra, Sotiria G. G. Papadimou, Evangelia E. E. Golia
Summary: Soil is susceptible to adverse effects from human activities and the use of biochar as a soil amendment has been developed as a method for its remediation. This study investigated the reduction of Pb, Cd, and Cu concentrations in soil through the addition of different types of biochar. The results showed that the addition of biochar can decrease the availability of heavy metals in soil, with sugarcane-derived biochar being the most effective in reducing Pb, Cd, and Cu concentrations. Overall, the use of biochar can improve the environmental quality of polluted soils and is a cost-effective and eco-friendly approach.
Article
Environmental Sciences
Shi-Wei Li, Minghui Chang, Xiaoyue Huang, Helian Li, Hong-Bo Li, Lena Q. Ma
Summary: The study found that Cd bioaccessibility in contaminated soils was mainly affected by exchangeable and carbonate-bound Cd, which were identified as the main sources of bioaccessible Cd in those soils.
Article
Biochemistry & Molecular Biology
Malwina Tytla, Kamila Widziewicz-Rzonca, Zuzanna Bernas
Summary: The purpose of this study was to determine the heavy metal content in different forms of sewage sludge using conventional and ultrasound-assisted sequential extraction methods. The study found that ultrasound treatment shortened the extraction time and reduced energy consumption. The results suggest that ultrasound-assisted extraction is a fast and simple method for HM fractionation and can be considered as an alternative to conventional procedures.
Article
Geochemistry & Geophysics
Carluvy Baptista-Salazar, Van Van Liem-Nguyen, Sofi Jonsson
Summary: Methylation and demethylation processes play a crucial role in controlling the concentration of monomethylmercury (MeHg) in natural environments. The formation of refractory MeHg pools in sediments and soils, which are not readily available for demethylation, is an important factor that contributes to the overall pool of MeHg.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Environmental Sciences
Nils Ribbe, Kenneth Arinaitwe, Tallent Dadi, Kurt Friese, Wolf von Tuempling
Summary: Lake Victoria, the second largest freshwater lake and largest tropical lake in the world, has a rapidly growing population in its transboundary catchment, potentially impacting water and sediment quality. The study analyzed trace elements, organic matter, and phosphorus in sediment layers near coastal cities in Uganda, finding no critical trace element contamination but detecting changes in element distributions caused by anthropogenic influences. Industries near Jinja were found to elevate copper content in sediments, potentially harming aquatic habitats, while increasing organic matter in sediments near River Nzoia's estuary indicated soil erosion and water hyacinth blooms. The study emphasizes the need for the entire catchment area to ensure a healthy aquatic ecosystem in Lake Victoria.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Tzu-Hao Huang, Xiaole Sun, Peeter Somelar, Kalle Kirsimae, Rebecca A. Pickering, Ji-Hoon Kim, Melanie Kielman-Schmitt, Wei-Li Hong
Summary: Silicon phases in marine sediments, including biogenic silica, lithogenic silicate, and authigenic silica/silicate, provide valuable information about past Si cycling. Wet-chemical sequential leaching methods are commonly used to extract different Si phases, but their efficiency in deeply-buried and diagenetically-modified sediments is not well studied. This study applied a sequential leaching protocol to drill core sediments and found that a longer digesting time or harsher alkaline leaching is needed to dissolve all diatoms in diagenetically-modified sediments. The success of separating Si phases relies on the knowledge of elemental abundance, stable Si isotopes, and information about the composition and maturation degree of biogenic silica.
Article
Geochemistry & Geophysics
W. K. Lenstra, R. Klomp, F. Molema, T. Behrends, C. P. Slomp
Summary: The extraction scheme is evaluated for manganese using a range of standards, showing the dependency of sediment manganese partitioning on bottom water redox conditions. Different sedimentary environments result in different forms of manganese in sediments.
Article
Environmental Sciences
F. Akbarpour, S. Gitipour, M. Baghdadi, N. Mehrdadi
Summary: The study focused on fractionation, distribution, mobility, and toxicity of lead, nickel, cadmium, copper, and zinc in contaminated soils in Tehran province, Iran. Results showed correlations between soil factors such as Eh, pH, clay, silt content, and organic matter with heavy metal retention. Heavy metals were strongly associated with the Fe-Mn oxide fraction, indicating potential risk of pollution of groundwater and food chain contamination.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
Mohamed A. Aly-Eldeen, Mohamed A. Shreadah, Safaa A. Abdel Ghani
Summary: In this study, the geochemical fractionations of heavy metals in El-Burullus Lake were investigated after the government's efforts to rehabilitate and restore the lake. The majority of the studied metals in the lake were found to come from lithogenic sources. The contamination level by individual heavy metals or multi elements was low, and the lake was found to have no toxic risk.
MARINE POLLUTION BULLETIN
(2023)
Article
Biochemistry & Molecular Biology
Mahrous Awad, Zhongzhen Liu, Milan Skalicky, Eldessoky S. Dessoky, Marian Brestic, Sonia Mbarki, Anshu Rastogi, Ayman EL Sabagh
Summary: The addition of biochar can safely reduce the toxicity of heavy metals to plants, but further research is needed to clarify the relationship between soil properties and potential mechanisms. This study investigated the fractionation of Pb, Cd, Zn, and Cu in naturally contaminated soil amended with biochar and found that soil pH and organic matter play a significant role in the redistribution of these metals. The study suggests that biochar can be an effective tool in reducing the risk of heavy metals in contaminated soil.
Article
Environmental Sciences
Zozo El-Saadani, Wang Mingqi, Zhang He, Shindume Lomboleni Hamukwaya, Mahmoud S. M. Abdel Wahed, Atef Abu Khatita
Summary: Heavy metal cadmium (Cd) pollutes the Nile River, with the highest concentration found near industrial sources. Cd's mobility poses a threat to aquatic animals and human life. Deterministic monitoring is necessary to address Cd pollution near industrial areas.
Article
Environmental Sciences
Sen Guo, Yizhang Zhang, Jieying Xiao, Qiuying Zhang, Junhong Ling, Baojian Chang, Guanglei Zhao
Summary: This study investigated the concentrations of heavy metals in sediment samples from Nansi Lake, with Cd being the most polluted metal. Industrial and mining sources were found to be the main influencing factors, while contributions from fertilizers and herbicides, though lower, showed an increasing trend.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biodiversity Conservation
Szymon Lucjan Rozanski, Jose Matias Penas Castejon, Donald G. McGahan
Summary: This study assessed the oral bioaccessibility and human health risk of metal(loid)s in potentially polluted urban topsoils, finding relatively low levels of pollution. However, soil pica behavior may lead to non-carcinogenic and carcinogenic risks, especially for children with lapses of adult supervision.
ECOLOGICAL INDICATORS
(2021)
Article
Green & Sustainable Science & Technology
Yingzun He, Monika Kasina
Summary: This manuscript focuses on the sustainable utilization of municipal waste incineration ashes in construction, evaluating the mobility of heavy metals and the associated environmental contamination risk. The study highlights the importance of stringent environmental management measures for responsible utilization.
