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Chemical fractionation of heavy metals in urban soils of Guangzhou, China.
Environ Monit Assess. 2007 Nov; 134(1-3):429-39.EM

Abstract

Knowledge of the total concentration of heavy metals is not enough to fully assess the environmental impact of urban soils. For this reason, the determination of metal speciation is important to evaluate their environment and the mobilization capacity. Sequential extraction technique proposed by the former European Community Bureau of Reference (BCR) was used to speciate Cd, Cu, Fe, Mn, Ni, Pb, and Zn in urban soils from Guangzhou into four operationally defined fractions: HOAc extractable, reducible, oxidizable, and residual. The Cu, Fe, Ni, and Zn were predominantly located in the residual fraction, Pb in the reducible fraction, and Cd and Mn within the HOAc extractable fraction. The order of Cd in each fraction was generally HOAc extractable > reducible > residual > oxidizable; Cu and Fe were residual > reducible > oxidizable > HOAc extractable; Mn was HOAc extractable > residual > reducible > oxidizable; Ni and Zn were residual > reducible > HOAc extractable > oxidizable; and Pb was reducible > residual > oxidizable > HOAc extractable. Cadmium was identified as being the most mobile of the elements, followed by Mn, Zn, Ni, Cu, Pb and Fe. Iron-Mn oxides can play an important role in binding Cd, Cu, Ni, Pb, and Zn and in decreasing their proportion associated with the residual fraction in the soils. With total concentrations of Cd, Cu, Ni, Pb, Zn, and Mn increase, these metals more easily release and may produce more negative effects on the urban environment.

Authors+Show Affiliations

State Key Laboratory of Soil and Sustainable Agriculture (Institute of Soil Science), Chinese Academy of Sciences, Nanjing 210008, People's Republic of China. luying@scau.edu.cnNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17294268

Citation

Lu, Ying, et al. "Chemical Fractionation of Heavy Metals in Urban Soils of Guangzhou, China." Environmental Monitoring and Assessment, vol. 134, no. 1-3, 2007, pp. 429-39.
Lu Y, Zhu F, Chen J, et al. Chemical fractionation of heavy metals in urban soils of Guangzhou, China. Environ Monit Assess. 2007;134(1-3):429-39.
Lu, Y., Zhu, F., Chen, J., Gan, H., & Guo, Y. (2007). Chemical fractionation of heavy metals in urban soils of Guangzhou, China. Environmental Monitoring and Assessment, 134(1-3), 429-39.
Lu Y, et al. Chemical Fractionation of Heavy Metals in Urban Soils of Guangzhou, China. Environ Monit Assess. 2007;134(1-3):429-39. PubMed PMID: 17294268.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemical fractionation of heavy metals in urban soils of Guangzhou, China. AU - Lu,Ying, AU - Zhu,Feng, AU - Chen,Jie, AU - Gan,Haihua, AU - Guo,Yanbiao, Y1 - 2007/02/10/ PY - 2006/10/11/received PY - 2007/01/22/accepted PY - 2007/2/13/pubmed PY - 2008/2/15/medline PY - 2007/2/13/entrez SP - 429 EP - 39 JF - Environmental monitoring and assessment JO - Environ Monit Assess VL - 134 IS - 1-3 N2 - Knowledge of the total concentration of heavy metals is not enough to fully assess the environmental impact of urban soils. For this reason, the determination of metal speciation is important to evaluate their environment and the mobilization capacity. Sequential extraction technique proposed by the former European Community Bureau of Reference (BCR) was used to speciate Cd, Cu, Fe, Mn, Ni, Pb, and Zn in urban soils from Guangzhou into four operationally defined fractions: HOAc extractable, reducible, oxidizable, and residual. The Cu, Fe, Ni, and Zn were predominantly located in the residual fraction, Pb in the reducible fraction, and Cd and Mn within the HOAc extractable fraction. The order of Cd in each fraction was generally HOAc extractable > reducible > residual > oxidizable; Cu and Fe were residual > reducible > oxidizable > HOAc extractable; Mn was HOAc extractable > residual > reducible > oxidizable; Ni and Zn were residual > reducible > HOAc extractable > oxidizable; and Pb was reducible > residual > oxidizable > HOAc extractable. Cadmium was identified as being the most mobile of the elements, followed by Mn, Zn, Ni, Cu, Pb and Fe. Iron-Mn oxides can play an important role in binding Cd, Cu, Ni, Pb, and Zn and in decreasing their proportion associated with the residual fraction in the soils. With total concentrations of Cd, Cu, Ni, Pb, Zn, and Mn increase, these metals more easily release and may produce more negative effects on the urban environment. SN - 0167-6369 UR - https://www.unboundmedicine.com/medline/citation/17294268/Chemical_fractionation_of_heavy_metals_in_urban_soils_of_Guangzhou_China_ L2 - https://doi.org/10.1007/s10661-007-9634-1 DB - PRIME DP - Unbound Medicine ER -