Cd(II) Sorption on Montmorillonite-Humic acid-Bacteria Composites

Du, Huihui; Chen, Wenli; Cai, Peng; Rong, Xingmin; Ke, Dan; Peacock, Caroline L.; Huang, Qiaoyun

doi:10.1038/srep19499

Cited by 56 publications

(44 citation statements)

References 44 publications

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“…Pseudomonas fluorescens strain ZY2 isolated from swine wastewater had a cross‐resistance to Pb and some antibiotics (Zhou et al ., ). Pseudomonas putida combined with humic acid had a higher Cd sorption; Cd was preferentially bonded to the bacteria in the ternary clay mineral‐humic acid‐bacteria higher affinity composite (Du et al ., ). Bacteria of Pseudomonas also performed well in dealing with other heavy metals.…”

Section: Discussionmentioning

confidence: 99%

Chrysomya megacephala larvae feeding favourably influences manure microbiome, heavy metal stability and greenhouse gas emissions

Wang

Gao

et al. 2018

Microbial Biotechnology

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Summary Chrysomya megacephala is a saprophagous fly whose larvae can compost manure and yield biomass and bio‐fertilizer simultaneously. However, there are concerns for the safety of the composting system, that is risk of diseases spread by way of manure pathogens, residue of harmful metals and emission of greenhouse gases. Microbiota analysis and heavy metal speciation by European Communities Bureau of Reference were evaluated in raw, C. megacephala‐composted and natural stacked swine manure to survey pathogenic bacterial changes and mobility of lead and cadmium in manure after C. megacephala feeding; the emission rate of CH4 and N2O from manure during C. megacephala composting and natural stacking was also measured. C. megacephala composting altered manure microbiota, reduced the risk of pathogenic bacteria and maintained the stability, and microbiota changes might be associated with heavy metal fractions, especially in Pseudomonas and Prevotella. In addition, C. megacephala‐composting significantly reduced the emission rate of CH4 and N2O in comparing with natural stacking situation and the first two days should be the crucial period for CH4 and N2O emission measurement for manure treatment by C. megacephala. Moreover, OTU26 and Betaproteobacteria were changed after C. megacephala composting which might play a role in emission of CH4 and N2O, respectively.

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Section: Discussionmentioning

confidence: 99%

Chrysomya megacephala larvae feeding favourably influences manure microbiome, heavy metal stability and greenhouse gas emissions

Wang

Gao

et al. 2018

Microbial Biotechnology

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“…MMT is widely used for radionuclide pollution controlling and repairing as a green environment-friendly material [10,11]. At the cellular level, MMT undergoes a series of interactions with microorganisms, including adsorption, aggregation, nucleation, and mineralization [12]. The reason is that the surface of bacteria is easy to dissolve ions or induce a variety of mineral ion nucleation, so as to achieve the purpose of adsorption or mineralization [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Montmorillonite on the Mineralization and Cementing Properties of Microbiologically Induced Calcium Carbonate

Zhu¹,

Li²,

Shi³

et al. 2017

Advances in Materials Science and Engineering

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Carbonate mineralization microbe is a microorganism capable of decomposing the substrate in the metabolic process to produce the carbonate, which then forms calcium carbonate with calcium ions. By taking advantage of this process, contaminative uranium tailings can transform to solid cement, where calcium carbonate plays the role of a binder. In this paper, we have studied the morphology of mineralized crystals by controlling the mineralization time and adding different concentrations of montmorillonite (MMT). At the same time, we also studied the effect of carbonate mineralized cementation uranium tailings by controlling the amount of MMT. The results showed that MMT can regulate the crystal morphology of calcium carbonate. What is more, MMT can balance the acidity and ions in the uranium tailings; it also can reduce the toxicity of uranium ions on microorganisms. In addition, MMT filling in the gap between the uranium tailings made the cement body more stable. When the amount of MMT is 6%, the maximum strength of the cement body reached 2.18 MPa, which increased by 47.66% compared with that the sample without MMT. Therefore, it is reasonable and feasible to use the MMT to regulate the biocalcium carbonate cemented uranium tailings.

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“…Cd-adsorbed montmorillonite, Cd-bacteria were used as an end-member for the two-component fitting of the binary composites, with linear combination performed over the k 3 range of 2.3-10 Å −1 (force weight to sum to 1). The goodness of fit was evaluated by the best-fit criterion values (R; Du et al, 2016). …”

Section: X-ray Absorption Spectroscopymentioning

confidence: 99%

“…Linear combination fitting (LCF) procedure has been successfully applied to obtain the partitioning of metal adsorption on bacteria-mineral composites (Du et al, 2016;Moon and Peacock, 2012;Templeton et al, 2003). This approach is based on the intermediate adsorption behavior of metals between the end-member components.…”

Section: Distribution Of CD On Montmorillonite-b Subtilis Composite mentioning

confidence: 99%

Surface complexation modeling of Cd(II) sorption to montmorillonite, bacteria, and their composite

Wang

Huang

et al. 2016

Biogeosciences

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Abstract. Surface complexation modeling (SCM) has emerged as a powerful tool for simulating heavy metal adsorption processes on the surface of soil solid components under different geochemical conditions. The component additivity (CA) approach is one of the strategies that have been widely used in multicomponent systems. In this study, potentiometric titration, isothermal adsorption, zeta potential measurement, and extended X-ray absorption fine-structure (EXAFS) spectra analysis were conducted to investigate Cd adsorption on 2 : 1 clay mineral montmorillonite, on Grampositive bacteria Bacillus subtilis, and their mineral-organic composite. We developed constant capacitance models of Cd adsorption on montmorillonite, bacterial cells, and mineralorganic composite. The adsorption behavior of Cd on the surface of the composite was well explained by CA-SCM. Some deviations were observed from the model simulations at pH < 5, where the values predicted by the model were lower than the experimental results. The Cd complexes of X 2 Cd, SOCd + , R-COOCd + , and R-POCd + were the predominant species on the composite surface over the pH range of 3 to 8. The distribution ratio of the adsorbed Cd between montmorillonite and bacterial fractions in the composite as predicted by CA-SCM closely coincided with the estimated value of EXAFS at pH 6. The model could be useful for the prediction of heavy metal distribution at the interface of multicomponents and their risk evaluation in soils and associated environments.

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Cd(II) Sorption on Montmorillonite-Humic acid-Bacteria Composites

Cited by 56 publications

References 44 publications

Chrysomya megacephala larvae feeding favourably influences manure microbiome, heavy metal stability and greenhouse gas emissions

Chrysomya megacephala larvae feeding favourably influences manure microbiome, heavy metal stability and greenhouse gas emissions

Effects of Montmorillonite on the Mineralization and Cementing Properties of Microbiologically Induced Calcium Carbonate

Surface complexation modeling of Cd(II) sorption to montmorillonite, bacteria, and their composite

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