Stabilization of nickel and chromium in sewage sludge during aerobic composting

Zheng, Guodi; Gao, Dingshan; Chen, Tongbin; Luo, Wei

doi:10.1016/j.jhazmat.2006.08.003

Cited by 84 publications

(43 citation statements)

References 28 publications

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“…The Cu and Cd fractions were analyzed by the Tessier Sequential Extraction method to determine the fractions in soil and sludge samples (Tessier et al, 1979;Zheng et al, 2007). Five solutions were generated successively: exchangeable (1 mol·L − 1 MgCl 2 , pH 7); carbonated bound (1 mol·L −1 NaOAc/HOAc, pH 5); Fe\ \Mn oxide bound (0.04 mol·L − 1 NH 2 OH·HCl in 25% HOAc); organically bound (0.02 mol·L −1 HNO 3 in 30% H 2 O 2 , pH 2; 3.2 mol·L −1 NH 4 OAc in 20% HNO 3 ); residual (digested with concentrated HNO 3 + HClO 4 ).…”

Section: Methodsmentioning

confidence: 99%

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Liu

2016

Science of The Total Environment

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Section: Methodsmentioning

confidence: 99%

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Liu

2016

Science of The Total Environment

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“…Zheng et al [82] found that Ni and Cr concentration increased 30.4% and 36.0%, respectively, due to the volatilization of gases such as H 2 O and CO 2 , which were produced during the degradation process of OM. The proportions of exchangeable, carbonate-bound, Fe-Mn oxide-bound, and organic matter-bound Ni and Cr decreased, while the proportions of residual Ni and Cr increased substantially, reducing their plant availability and environmental risks.…”

Section: Sewage Sludge Compostingmentioning

confidence: 99%

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

2017

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Abstract:The safe disposal of sewage sludge during the process of municipal wastewater treatment has become one of the major concerns of increased production. Land application was thought of as a more economical method for sewage sludge disposal than landfill and incineration. However, the presence of heavy metals in sewage sludge restricted the use of land application. The environmental risk of heavy metals was dependent on their contents, chemical speciations, and soil characteristics. Composting and chemical immobilization were the commonly used methods to immobilize the heavy metals in sewage sludge. The immobilization mechanism and speciation transformation of heavy metals during the composting process were presented. Aluminosilicate, phosphorus-bearing materials, basic compounds, and sulfides were reviewed as the commonly used chemical immobilizing agents. The problems that occur during the immobilization process were also discussed. The combination of different methods and the modification of chemical immobilizing agents both improved the fixation effect on heavy metals.

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“…In trials 3 and 5, the F1 fraction was reduced, but the F2 and F5 fractions were increased. Through the composting process, the proportion of F1 and F2 fractions of Ni were decreased while the proportion of the F5 fraction of Ni was increased; this was due to F1 and F2 fractions of Ni, which were transformed into the F5 fraction during the composting process [17,32].…”

Section: Speciation Of Ni Pb CD and Crmentioning

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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Stabilization of nickel and chromium in sewage sludge during aerobic composting

Cited by 84 publications

References 28 publications

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Relationship between organic matter humification and bioavailability of sludge-borne copper and cadmium during long-term sludge amendment to soil

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

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

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