Evolution of heavy metal speciation during the aerobic composting process of sewage sludge

Liu, Yangsheng; Ma, Lanlan; Li, Yaqiong; Zheng, Liting

doi:10.1016/j.chemosphere.2006.10.056

Cited by 148 publications

(63 citation statements)

References 23 publications

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“…In water hyacinth and sawdust, F1 and F5 fractions were predominant, but composting process. These heavy metals were concentrated during the composting process, which was reported by Liu et al [22], due to the weight loss in the course of composting following organic matter decomposition, release of CO 2 water and mineralization processes. The order of total metal content in the composted water hyacinth was Fe > Pb > Mn > Ni > Zn > Cu > Cr > Cd.…”

Section: Heavy Metal Speciation During Compostingmentioning

confidence: 99%

Bioconversion of flowers waste: Composting using dry leaves as bulking agent

Sharma

Yadav

2017

Environmental Engineering Research

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Studies were carried out on the speciation of heavy metals (Zn, Cu, Mn, Fe, Ni, Pb, Cd, and Cr) during rotary drum composting of water hyacinth (Eichhornia crassipes) for a period of 20 days. Five different proportions of cattle manure, water hyacinth and sawdust were prepared for composting. This study concluded that, rotary drum was very efficient for the degradation of organic matter as well as for the reduction of mobility and bioavailability of heavy metals during water hyacinth composting. The results from the sequential extraction procedure of heavy metals shows that rotary drum composting changed the distribution of five fractions of Zn, Cu, Mn, Fe, Ni, Pb, Cd, and Cr. The highest reduction in the bioavailability factors of Pb and Cd was observed during the process. The total concentration of Cu, Cr, and Cd was very low compared to the other metals (Zn, Mn, Fe, Ni, and Pb); however, the percentage of exchangeable and carbonate fractions of these metals was similar to other metals. These results confirmed that the bioavailability of metals does not depend on the total concentration of metals. From this study, it can be concluded that the addition of an appropriate proportion of cattle manure significantly reduced the mobile and easily available fractions (exchangeable and carbonate fractions) during water hyacinth composting in rotary drum.

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Section: Heavy Metal Speciation During Compostingmentioning

confidence: 99%

Bioconversion of flowers waste: Composting using dry leaves as bulking agent

Sharma

Yadav

2017

Environmental Engineering Research

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“…The trace element inputs through land application could be substantial, even when the biosolids are applied in -110 2620 1210 1360 --320 -2790 1979 7 69 429 602 369 3 18 135 7 1594 1987 12 26 430 711 308 3 109 167 6 1540 1988 10 7 119 741 134 5 9 43 5 1202 1996 12 6 103 506 111 2 15 57 6 830 a Note: the data were based on average from 150, 40,364,200, and >200 treatment plants in United States. Reproduced with permission from A.C. Chang, G. Pan, A.L.…”

Section: Land Application and Trace Element Loadingmentioning

confidence: 99%

“…The chemical forms of trace elements in biosolids and thus their availability for plant absorption might change prior to the soil incorporation due to the dewatering and composting processes [38][39][40]. It had been postulated that during the course of wastewater treatment and sewage sludge processing, the biosolids-borne trace elements formed complexes with the organic solids, limiting their availability for plant absorption upon land application [17].…”

Section: Trace Element Availability In Biosolids-amended Soils -A Timmentioning

confidence: 99%

Trace Elements in Biosolids‐Amended Soils

Chen

Chang

et al. 2010

Trace Elements in Soils

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“…The conventional sequential chemical extraction method by Tessier et al(1979), which is widely used in the investigation of heavy metal speciation in sewage sludge (Liu et al 2007;Cai et al 2007), was employed for the analysis of heavy metal speciation and the extraction procedure was shown in Table 2. The extraction was carried out in 50 ml polypropylene centrifuge tubes.…”

Section: Analysis Of Heavy Metal Speciationmentioning

confidence: 99%

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

2011

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Sewage sludge is an inevitable end by-product of sewage treatment. Land application provides a costeffective alternative for sewage sludge disposal. However, sewage sludge contains heavy metals that may limit its application. In this work, red mud was employed for the immobilization of heavy metals in sewage sludge. The effect of red mud amendment on heavy metal immobilization was evaluated using Toxicity Characteristic Leaching Procedure (TCLP) method. The TCLP results showed that the immobilization efficiency of Cd, Zn and Pb was 100, 92, and 82%, respectively, when sewage sludge was mixed with 10% red mud. Tests carried out in leaching columns demonstrated that heavy metal concentrations in the leachate of 10% red mud amended sludge were lower than those of the unamended sludge. Moreover, red mud decreased plant available heavy metal (Cd, Zn and Pb) content from 18.1, 17.2 and 14.6% to 6.9, 11.4 and 7.6%, respectively. Sequential chemical extraction experiments showed that after sludge was amended with 10% red mud, exchangeable fraction was reduced and iron and manganese oxides fraction was increased. Red mud amendment can effectively immobilize Cd, Zn and Pb in sewage sludge before land application.

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Evolution of heavy metal speciation during the aerobic composting process of sewage sludge

Cited by 148 publications

References 23 publications

Bioconversion of flowers waste: Composting using dry leaves as bulking agent

Bioconversion of flowers waste: Composting using dry leaves as bulking agent

Trace Elements in Biosolids‐Amended Soils

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

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