Feasibility of bioleaching combined with Fenton-like reaction to remove heavy metals from sewage sludge

Zhu, Yi; Zeng, Guangming; Zhang, Panyue; Zhang, Chang; Miaomiao, Ren; Zhang, Jiachao; Chen, Ming

doi:10.1016/j.biortech.2013.05.070

Cited by 66 publications

(27 citation statements)

References 22 publications

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“…Nutrients are essential for plant growth (Hanay et al, 2009;Singh and Sinha, 2004;Zhang et al, 2008), and the use of sewage sludge in agriculture to ameliorate the physicochemical deficiencies of degraded soil is a practice that is growing worldwide (Gupta and Sinha, 2006;Singh and Agrawal, 2007). Moreover, land application is considered one of the most economic and effective ways to dispose of sludge and supply plants with nutrients (Zhu et al, 2013). However, there are toxic metals in sewage sludge that necessitate restrictions on its use for certain land applications because of the potential for environmental and human health risks (Wang et al, 2012;Zhu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, land application is considered one of the most economic and effective ways to dispose of sludge and supply plants with nutrients (Zhu et al, 2013). However, there are toxic metals in sewage sludge that necessitate restrictions on its use for certain land applications because of the potential for environmental and human health risks (Wang et al, 2012;Zhu et al, 2013). Therefore, there is need for sludge treatment methods that can reduce toxic metals while preserving nutrients, especially if the sludge is to be reused for farmland.…”

Section: Introductionmentioning

confidence: 99%

“…As shown in previous studies, large doses and frequent applications of additives are typically needed to remove high concentrations of metals from sewage sludge (Deng et al, 2009;Zhu et al, 2009Zhu et al, , 2013. However, such a large number of washings results in high processing costs and can even be detrimental to the environment because of the loss of nutrients (e.g., total nitrogen (TN), total phosphorus (TP), available-N, Olsen-P, and organic matter).…”

Section: Introductionmentioning

confidence: 99%

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Citric acid and ethylene diamine tetra-acetic acid as effective washing agents to treat sewage sludge for agricultural reuse

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Citric acid and ethylene diamine tetra-acetic acid as effective washing agents to treat sewage sludge for agricultural reuse

et al. 2015

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“…Former research had revealed that the S1 fraction was easy to be exchanged [26]. According to the mechanism of sequential extraction procedure, S2 and S3 fractions could be also exchanged at the end of bioleaching because the bioleaching conditions were much more strenuous than the extraction conditions [29]. Sequential extraction investigation revealed that the contents of S1, S2, and S3 fractions of heavy metals in acidified sewage sludge decreased with increase in cotton stalk, and the distribution of these fractions became irregular.…”

Section: Speciation Of Heavy Metals After Bioleaching and The Leachinmentioning

confidence: 98%

Enhancement of metal bioleaching from sewage sludge by cotton stalk

Wang

2016

Desalination and Water Treatment

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A B S T R A C TIt was found that the distribution of heavy metals in liquid and solid phases at the end of bioleaching of sewage sludge could be described by adsorption isotherm model. Cotton stalk could be used to improve heavy metal leaching efficiency in bioleaching of sewage sludge. Amended with 5 g/L cotton stalk in late bioleaching, leaching efficiency increased from 56. 75, 56.42, and 62.28 to 73.18, 81.34, and 82.39% for copper, lead, and chromium, respectively, with 6% pulp density. Relationship between heavy metals in liquid phase and that adsorbed onto cotton stalk could be described by Freundlich equation. Adsorption onto cotton stalk lowered heavy metal concentration in liquid phase. Consequently, more heavy metals were released from sewage sludge. The increased section of heavy metals released from sludge was mainly attributed to mobile fractions. Content of heavy metals in stable fractions was left unchanged. Mobility of residual heavy metals in sludge after bioleaching with treatment was also lowered greatly.

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“…Bio-leaching is the method based on extracting heavy metals in infusible solid form by using functions of natural micro-organism such as oxidation, reduction, complexion and dissolution (Pathak et al, 2009b;Peng et al, 2011;Zhu et al, 2013). Heavy metals in liquid wasted water are usually removed by chemical and electrochemical methods (Kaminari et al, 2007;Hunsom et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Using microbiological leaching method to remove heavy metals from sludge

Gu¹,

Aikebaier²,

Arefieva³

et al. 2017

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 13.05.2016 Accepted : 11.07.2016 Microbial leaching is one of the most effective methods to remove heavy metals from sludge. In the conducted researches, the sludge samples were processed with Thiobacillus ferrooxidans and Thiobacillus thiooxidans obtained via cultivation, extraction and purification processes. Heavy metals such as Pb, Cd, Cu and Ni were leached from sludge by Thiobacillus ferrooxidans and Thiobacillus thiooxidans within different substrate concentration and pH value conditions. It is defined that from the point of view of economy and efficiency the optimal concentration of FeSO4.7H2O and sulfur for bio-leaching process was 0.2 g. The leaching rates of heavy metals such as Pb, Cd, Cu and Ni of the same concentration were 74.72%, 81.54%, 70.46% and 77.35% respectively. However, no significant differences depending on the pH value among the leaching rates were defined, even for the pH value of 1.5. Along with the removal of heavy metals from sludge, the organic matter, N, P, K were also leached to some extent. The losing rate of phosphorus was the highest and reached 38.44%. However, the content of organic matter, N, P, K in the processed sludge were higher in comparison with level I of the National Soil Quality Standards of China. Ecological risk of heavy metals in sludge before and after leaching was assessed by Index of Geo-accumulation (Igeo) and comprehensive potential risk (RI). The results of research defined that the content of heavy metals in sludge meets the level of low ecological risk after leaching and their contents is lower in comparison with the National Agricultural Sludge Standard of China. Sludge leached by biological methods is possible to use for treatment for increasing soil fertility.

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Feasibility of bioleaching combined with Fenton-like reaction to remove heavy metals from sewage sludge

Cited by 66 publications

References 22 publications

Citric acid and ethylene diamine tetra-acetic acid as effective washing agents to treat sewage sludge for agricultural reuse

Citric acid and ethylene diamine tetra-acetic acid as effective washing agents to treat sewage sludge for agricultural reuse

Enhancement of metal bioleaching from sewage sludge by cotton stalk

Using microbiological leaching method to remove heavy metals from sludge

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