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Heavy metal contamination of a mixed waste compost: metal speciation and fate.
Bioresour Technol. 2009 Oct; 100(19):4423-32.BT

Abstract

The aims of this study were to assess changes in heavy metal availability in two contrasting feedstocks during aerobic composting, and the availability of said metals in the finished composts. A high C-to-N ratio mixed biodegradable municipal solid waste (MSW) feedstock was successfully composted on its own and in combination with green waste. Changes in heavy metal speciation throughout the composting process were studied using the modified BCR sequential extraction protocol. It was found that total Cu, Pb and Zn concentrations increased over time due to the progressive mineralization of the compost feedstock. Metals were fractionated differently within the two feedstocks, although only Cu showed significant redistribution (mostly to the oxidisable fraction) over the 5 month composting period. The MSW-derived composts performed comparably with other commercially-available composts in a series of plant growth trials. Plant metal accumulation was not influenced by the heavy metals present in the MSW-derived compost implying that they are not plant available. It is recommended that these relatively low value/quality composts may be used for remediation of acidic heavy metal contaminated sites.

Authors+Show Affiliations

School of the Environment and Natural Resources, Bangor University, Gwynedd, UK. m.farrell@bangor.ac.ukNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19428240

Citation

Farrell, Mark, and Davey L. Jones. "Heavy Metal Contamination of a Mixed Waste Compost: Metal Speciation and Fate." Bioresource Technology, vol. 100, no. 19, 2009, pp. 4423-32.
Farrell M, Jones DL. Heavy metal contamination of a mixed waste compost: metal speciation and fate. Bioresour Technol. 2009;100(19):4423-32.
Farrell, M., & Jones, D. L. (2009). Heavy metal contamination of a mixed waste compost: metal speciation and fate. Bioresource Technology, 100(19), 4423-32. https://doi.org/10.1016/j.biortech.2009.04.023
Farrell M, Jones DL. Heavy Metal Contamination of a Mixed Waste Compost: Metal Speciation and Fate. Bioresour Technol. 2009;100(19):4423-32. PubMed PMID: 19428240.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Heavy metal contamination of a mixed waste compost: metal speciation and fate. AU - Farrell,Mark, AU - Jones,Davey L, Y1 - 2009/05/09/ PY - 2009/02/04/received PY - 2009/04/07/revised PY - 2009/04/10/accepted PY - 2009/5/12/entrez PY - 2009/5/12/pubmed PY - 2009/8/21/medline SP - 4423 EP - 32 JF - Bioresource technology JO - Bioresour. Technol. VL - 100 IS - 19 N2 - The aims of this study were to assess changes in heavy metal availability in two contrasting feedstocks during aerobic composting, and the availability of said metals in the finished composts. A high C-to-N ratio mixed biodegradable municipal solid waste (MSW) feedstock was successfully composted on its own and in combination with green waste. Changes in heavy metal speciation throughout the composting process were studied using the modified BCR sequential extraction protocol. It was found that total Cu, Pb and Zn concentrations increased over time due to the progressive mineralization of the compost feedstock. Metals were fractionated differently within the two feedstocks, although only Cu showed significant redistribution (mostly to the oxidisable fraction) over the 5 month composting period. The MSW-derived composts performed comparably with other commercially-available composts in a series of plant growth trials. Plant metal accumulation was not influenced by the heavy metals present in the MSW-derived compost implying that they are not plant available. It is recommended that these relatively low value/quality composts may be used for remediation of acidic heavy metal contaminated sites. SN - 1873-2976 UR - https://www.unboundmedicine.com/medline/citation/19428240/Heavy_metal_contamination_of_a_mixed_waste_compost:_metal_speciation_and_fate_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0960-8524(09)00388-5 DB - PRIME DP - Unbound Medicine ER -