Fraction distribution and leaching behavior of heavy metals in dredged sediment disposal sites around Meiliang Bay, Lake Taihu (China)
| Autor: | Xiao-Lan Zheng, Chengxin Fan, Jicheng Zhong, Min Liu, Dehong Liu, Juhua Yu |
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| Rok vydání: | 2018 |
| Předmět: |
China
Geologic Sediments Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences 010502 geochemistry & geophysics 01 natural sciences Rainwater harvesting Soil Metals Heavy Environmental Chemistry Extraction (military) Leaching (agriculture) 0105 earth and related environmental sciences Cadmium Sediment General Medicine Pollution Lakes Waste Disposal Facilities Bays chemistry Environmental chemistry Soil water Environmental science Acid rain Bay Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Science and Pollution Research. 25:9737-9744 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-018-1249-2 |
| Popis: | The objectives of this study were to characterize the heavy metal contamination status of surface soils sampled at two dredged sediment land disposal sites (the Baimao and Kongwan landfills) in Meiliang Bay, Lake Taihu, China, as well as to investigate the effect on their leaching behaviors due to acid rain. Among all the metals, only the nickel content in the Baimao landfill was higher than the Chinese reference value, and all metal contents were below the limit values for agricultural soils. The fraction distribution of metals by sequential extraction was similar at both sites. Cadmium had a relatively high proportion of exchangeable-carbonate fractions, while the other metals were mainly classified as residue fractions. The metals released from soils by simulated rainwater comprised less than 1% of the total soil metal content, and the effect of acid rain on heavy metal release from dredged sediments in land disposal sites was found to be negligible at both sites. All results indicate no environmental concern for the land disposal of dredged sediments and support the feasibility of beneficially reusing dredged sediment soils as a supplement to agricultural soils. |
| Databáze: | OpenAIRE |
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