Phytotoxicity and speciation of copper, zinc and lead during the aerobic composting of sewage sludge

He, Meng; Tian, Guangming

doi:10.1016/j.jhazmat.2008.07.013

Cited by 87 publications

(30 citation statements)

References 34 publications

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“…He et al [87] suggested that the transformation of heavy metals speciation and phytotoxicity of sewage sludge were dependent on multiple components, such as pH, OM, dissolved organic carbon (DOC), and mobile metal fractions, rather than a single element. The decomposition of OM during composting was thought to be the most important accessorial factor to influence the phytotoxicity and speciation of heavy metals.…”

Section: Sewage Sludge Compostingmentioning

confidence: 99%

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

Zhang

Wang

2017

Sustainability

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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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Section: Sewage Sludge Compostingmentioning

confidence: 99%

“…[87,88]. As an effective method to reduce the mobility of heavy metals in sewage sludge, composting has the shortcomings of a large one-time investment, a wide area, and a long period of composting.…”

Section: Sewage Sludge Compostingmentioning

confidence: 99%

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

Zhang

Wang

2017

Sustainability

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“…At the end of the composting process, for each investigated windrow, a sample of about 200 g was collected from 5 random locations and thoroughly mixed to generate a single composite sample [18]. The obtained samples were stored for 24 h in a cooling cell at 0-7 • C.…”

Section: Measuring Chemical Parametersmentioning

confidence: 99%

“…However, the presence of non-biodegradable and toxic heavy metals limits agricultural application of composted manure [18]. Pig slurry SF often contains high concentrations of copper (Cu) compared with other animal manures, because Cu supplements are normally added to pig rations to accelerate weight gain and increase the food conversion rates when fattening pigs [19].…”

Section: Introductionmentioning

confidence: 99%

Phytotoxicity and Chemical Characterization of Compost Derived from Pig Slurry Solid Fraction for Organic Pellet Production

Pampuro

Bisaglia²,

Romano³

et al. 2017

Agriculture

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Abstract:The phytotoxicity of four different composts obtained from pig slurry solid fraction composted by itself (SSFC) and mixed with sawdust (SC), woodchips (WCC) and wheat straw (WSC) was tested with bioassay methods. For each compost type, the effect of water extracts of compost on seed germination and primary root growth of cress (Lepidium Sativum L.) was investigated. Composts were also chemically analysed for total nitrogen, ammonium, electrical conductivity and heavy metal (Cu and Zn). The chemicals were correlated to phytotoxicity indices. The mean values of the germination index (GI) obtained were 160.7, 187.9, 200.9 and 264.4 for WSC, WCC, SC and SSFC, respectively. Growth index (GrI) ranged from the 229.4%, the highest value, for SSFC, followed by 201.9% for SC, and 193.1% for WCC, to the lowest value, 121.4%, for WSC. Electrical conductivity showed a significant and negative correlation with relative seed germination at the 50% and 75% concentrations. A strong positive correlation was found for water-extractable Cu with relative root growth and germination index at the 10% concentration. Water-extractable Zn showed a significant positive correlation with relative root growth and GI at the 10% concentration. These results highlighted that the four composts could be used for organic pellet production and subsequently distributed as a soil amendment with positive effects on seed germination and plant growth (GI > 80%).

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“…The evaluation of the chemical speciation of heavy metals in composts permits access to their bioavailability and suitability for land application [8]. The sequential chemical extraction procedure could provide an understanding of the heavy metal speciation with different natures and also allow for the prediction of metal mobility, bioavailability and leaching rates [12]. The mobility and bioavailability of metals are decreased approximately in the order of extraction sequence [13].…”

Section: Introductionmentioning

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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Phytotoxicity and speciation of copper, zinc and lead during the aerobic composting of sewage sludge

Cited by 87 publications

References 34 publications

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

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

Phytotoxicity and Chemical Characterization of Compost Derived from Pig Slurry Solid Fraction for Organic Pellet Production

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

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