Removal of heavy metals from sewage sludge with a combination of bioleaching and electrokinetic remediation technology

Peng, Guiqun; Tian, Guangming; Liu, Junzhi; Bao, Qibei; Zang, Ling

doi:10.1016/j.desal.2010.12.015

Cited by 85 publications

(30 citation statements)

References 24 publications

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“…The rising temperature lead to a decreasing liquid viscosity, which improved the conductivity of the DWTS [35], these positive effects led to the rising current, enhanced electro-osmosis intensity and the accelerated migration speed of water. 4h later, the current gradually reduced to 0.5 A, previous research found free ions were discharged out with water together which directly reduce the conductivity of DWTS so that reduced the strength of electro-osmosis, too [39,40].the reduction of conductivity of DWTS was confirmed in Fig .3c.…”

Section: Effect Of Phsupporting

confidence: 76%

Dewatering of drinking water treatment sludge by vacuum electro-osmosis

Shen

Ding

et al. 2016

Separation Science and Technology

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Section: Effect Of Phsupporting

confidence: 76%

Dewatering of drinking water treatment sludge by vacuum electro-osmosis

Shen

Ding

et al. 2016

Separation Science and Technology

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“…Heavy metal contamination has become a worldwide concern with anthropogenic activities including metal processing, tanneries, and electroplating industries (Guo et al 2008;Peng et al 2011). Heavy metals are usually distributed as watersoluble species, colloids, or sedimentary phases in water bodies and then precipitated in sediments (Salomons and Stigliani 1995).…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of multiple heavy metals from contaminated sediment by mesophile consortium

Gan

Zhou

et al. 2014

Environ Sci Pollut Res

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A defined mesophile consortium including Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirilum ferriphilum was applied in bioleaching sediments contaminated with multiple heavy metals. Flask experiments showed that sulfur favored the acidification in the early stage while pyrite led to a great acidification potential in the later stage. An equal sulfur/pyrite ratio got the best acidification effect. Substrate utilization started with sulfur in the early stage, and then the pH decline and the community shift give rise to the utilization of pyrite. Solubilization efficiency of Zn, Cu, Mn, and Cd reached 96.1, 93.3, 92.13, and 87.65%, respectively. Bioleaching efficiency of other elements (As, Hg, Pb) was not more than 30%. Heavy metal solubilization was highly negatively correlated with pH variation. Logistic models were well fitted with the solubilization efficiency, which can be used to predict the bioleaching process. The dominant species in the early stage of bioleaching were A. ferrooxidans and A. thiooxidans, and the abundance of L. ferriphilum increased together with pyrite utilization and pH decline.

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“…Researches show that the heavy metals in sewage sludge mainly exist in the form of inorganic precipitators and organic complex such as oxide, hydroxide, silicate and insoluble salts [2,3] . If the sewage sludge is directly used for landfill or agricultural utilization, it's bound to generate pollution to the soil and surface water, which has hidden dangers to serious sanitation and environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Migration of Heavy Metals in the Sewage Sludge Treated by Supercritical/Subcritical Water Oxidation Process

Ma¹,

Zhou²,

Lin³

2015

Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

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Abstract. Super/sub-critical water oxidation technology has been utilized to treat sewage sludge in the study. Heavy metal content and characteristics of leaching toxicity in the reaction effluent have been investigated in detail, and then the relationship between the microstructure of sludge residue and immobilization of heavy metals is analyzed systematically. The obtained results show that the enrichment ratios of heavy metals in the sludge residue are above 68%, except As; Super/sub-critical water oxidation process has good immobilization effects on the heavy metals in sewage sludge residue, except Cd and Cu; Compared with subcritical state, supercritical water oxidation process has more obvious immobilization effects on the heavy metals in sewage sludge residue. The heavy metals in sewage sludge residue exist in the form of complex compounds, presenting obviou s crystalline state, with part of crystal structures being similar. The formation of crystal microstructures contribute to the enrichment and immobilization of heavy metals in sewage sludge.

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Removal of heavy metals from sewage sludge with a combination of bioleaching and electrokinetic remediation technology

Cited by 85 publications

References 24 publications

Dewatering of drinking water treatment sludge by vacuum electro-osmosis

Dewatering of drinking water treatment sludge by vacuum electro-osmosis

Bioleaching of multiple heavy metals from contaminated sediment by mesophile consortium

Comparative Study on the Migration of Heavy Metals in the Sewage Sludge Treated by Supercritical/Subcritical Water Oxidation Process

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