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- Title
Adsorption of Cd on Soils with Various Particle Sizes from an Abandoned Non-ferrous Smelting Site: Characteristics and Mechanism.
- Authors
Jiang, Zhichao; Guo, Zhaohui; Peng, Chi; Anaman, Richmond; Ran, Hongzhen; Xiao, Xiyuan
- Abstract
Soil particle size could intensively impact the Cd adsorption in soils. The adsorption characteristics of Cd on miscellaneous fill (MF) and weathered slate (WS), collected from a zinc smelting site, were studied by batch experiments under conditions of different initial Cd concentrations and soil particle sizes. The results showed that the adsorption kinetics of Cd for soil particles from MF and WS were well fitted with the pseudo-first-order model, and the Cd adsorption isotherms well conformed to the Freundlich model. Soil particle size had an inconspicuous influence on adsorption rate, while the adsorption capacity decreased with particle size increase. The Cd adsorption on soil particles could be due to the exchange with Fe/Al, and -OH/C=O sites were the predominant adsorption sites. The MF may cause secondary pollution risk due to its low adsorption ability for Cd in smelting sites.
- Subjects
SOIL particles; SOIL absorption &; adsorption; ZINC smelting; SMELTING; ADSORPTION kinetics
- Publication
Bulletin of Environmental Contamination & Toxicology, 2022, Vol 109, Issue 4, p630
- ISSN
0007-4861
- Publication type
Article
- DOI
10.1007/s00128-022-03465-y