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Evolution of heavy metal speciation during the aerobic composting process of sewage sludge.
Chemosphere. 2007 Mar; 67(5):1025-32.C

Abstract

The contents of heavy metals and their bioavailability to the soil-plant system were the major limitation to the application of sewage sludge compost in soil. This study was conducted to determine the evolution of heavy metal speciation in the course of an aerobic composting, and investigate the influence of changes of composting process parameters including pH, temperature and organic matter (OM) content on distribution of heavy metal speciation in composted sludge. The sequential extraction procedure developed by Tessier et al. was used in sludge compost to determine the heavy metal speciation. Results showed that, during composting, (1) the contents of the residue fraction for Pb, Zn and Cd were decreased but those for Ni and Cr were increased; the Cu residue fraction was almost constant; (2) the contents of the total mobile fractions (including fractions 1-4) for Zn and Pb were significantly increased, but the increase of those for Cu and Ni were not so remarkable; (3) there were significant degrees of correlation between heavy metal fractions and changes of some selected parameters (for example, pH, composting temperature, and OM content). Only the content of the total mobile fractions for Cu could be predictable from its total content. For the prediction of the total mobile fractions of Zn, Ni, Cd and Cr, the R(2) value was significantly increased by the inclusion of other variables such as pH, temperature and OM content.

Authors+Show Affiliations

Department of Environmental Engineering, College of Environmental Sciences, Peking University, Beijing 100871, China. liu_ysh@263.netNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17184823

Citation

Liu, Yangsheng, et al. "Evolution of Heavy Metal Speciation During the Aerobic Composting Process of Sewage Sludge." Chemosphere, vol. 67, no. 5, 2007, pp. 1025-32.
Liu Y, Ma L, Li Y, et al. Evolution of heavy metal speciation during the aerobic composting process of sewage sludge. Chemosphere. 2007;67(5):1025-32.
Liu, Y., Ma, L., Li, Y., & Zheng, L. (2007). Evolution of heavy metal speciation during the aerobic composting process of sewage sludge. Chemosphere, 67(5), 1025-32.
Liu Y, et al. Evolution of Heavy Metal Speciation During the Aerobic Composting Process of Sewage Sludge. Chemosphere. 2007;67(5):1025-32. PubMed PMID: 17184823.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evolution of heavy metal speciation during the aerobic composting process of sewage sludge. AU - Liu,Yangsheng, AU - Ma,Lanlan, AU - Li,Yaqiong, AU - Zheng,Liting, Y1 - 2006/12/20/ PY - 2006/06/24/received PY - 2006/10/15/revised PY - 2006/10/21/accepted PY - 2006/12/23/pubmed PY - 2007/5/15/medline PY - 2006/12/23/entrez SP - 1025 EP - 32 JF - Chemosphere JO - Chemosphere VL - 67 IS - 5 N2 - The contents of heavy metals and their bioavailability to the soil-plant system were the major limitation to the application of sewage sludge compost in soil. This study was conducted to determine the evolution of heavy metal speciation in the course of an aerobic composting, and investigate the influence of changes of composting process parameters including pH, temperature and organic matter (OM) content on distribution of heavy metal speciation in composted sludge. The sequential extraction procedure developed by Tessier et al. was used in sludge compost to determine the heavy metal speciation. Results showed that, during composting, (1) the contents of the residue fraction for Pb, Zn and Cd were decreased but those for Ni and Cr were increased; the Cu residue fraction was almost constant; (2) the contents of the total mobile fractions (including fractions 1-4) for Zn and Pb were significantly increased, but the increase of those for Cu and Ni were not so remarkable; (3) there were significant degrees of correlation between heavy metal fractions and changes of some selected parameters (for example, pH, composting temperature, and OM content). Only the content of the total mobile fractions for Cu could be predictable from its total content. For the prediction of the total mobile fractions of Zn, Ni, Cd and Cr, the R(2) value was significantly increased by the inclusion of other variables such as pH, temperature and OM content. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/17184823/Evolution_of_heavy_metal_speciation_during_the_aerobic_composting_process_of_sewage_sludge_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(06)01390-7 DB - PRIME DP - Unbound Medicine ER -