Simultaneous removal of heavy metals and biodegradation of organic matter with sediment microbial fuel cells

Wu, Mingsong; Xu, Xinhua; Zhao, Qingliang; Wang, Z. Y.

doi:10.1039/c7ra11103g

Cited by 48 publications

(14 citation statements)

References 26 publications

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“…Although there is a growing number of studies regarding the removal of heavy metals and organic contaminants using different treatment technologies [86], very few publications address the simultaneous removal of different types of pollutants in real context scenarios, such as complex industrial effluents. Among the different strategies adopted for the simultaneous removal of heavy metals and organic pollutants that have been reported in literature, namely adsorption processes [87,88], photocatalysis [89,90], electroremediation [91,92] and biological processes [46,93], the last present important advantageous due to the possibility for heavy metals recovery, cost-effectiveness and regeneration of the biosorbents used [94]. Although the use of biological processes is associated with some limitations, for instance not all microorganisms have the ability to breakdown any pollutants, as well as the inhibition of growth due to the presence of toxic pollutants, in this work that limitations were overcome since the developed permeable bio-barrier revealed to be efficient on the simultaneous removal of ketones and heavy metals.…”

Section: Discussionmentioning

confidence: 99%

Rehabilitation of a complex industrial wastewater containing heavy metals and organic solvents using low cost permeable bio-barriers – From lab-scale to pilot-scale

Silva

Rocha

Lago

et al. 2021

Separation and Purification Technology

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This work addresses the treatment of a complex industrial effluent containing high concentrations of metals and spiked with two organic solvents (diethylketone -DEK, and methyl ethyl ketone -MEK) using an eco-friendly approach. The treatment system herein proposed consists of a bio-barrier that combines the adsorption capacity of sepiolite with the properties of a Streptococcus equisimilis biofilm with proven ability in the degradation and bioremoval of a wide range of pollutants.Results from the open-systems experiments conducted with raw sepiolite exposed to a binary mixture of DEK and MEK revealed the preference of the sorbent towards DEK. The results from the biodegradation experiments also revealed the preference of S. equisimilis to degrade/bioremove DEK over MEK independently of their initial concentration (100 mg/L to 3200 mg/L). Bioremoval percentages higher than 95% were reached for all the concentrations of DEK tested. The lab-scale experiments conducted in open-system with sepiolite and sepiolite covered with biofilm, and the pilot-scale experiment conducted in closed-loop, revealed similar performances on the rehabilitation of an industrial effluent containing heavy metals and additionally spiked with DEK and MEK. Regarding the selectivity towards the different pollutants, Cu was preferentially removed over Cr and Ni, and DEK over MEK. The presence of the biofilm allowed an improvement on the removal of heavy metals, particularly Cr, besides preventing the leaching of Al, Fe, and Mg from the sepiolite structure, an extremely important advantage in comparison to the system without biofilm. EDS analyses performed in sepiolite samples revealed the presence of several metals (Cr, Cu and Ni), proving thus the occurrence of sorption processes by sepiolite and by sepiolite covered by biofilm. The breakthrough data obtained in the open-systems were properly described by the Dose Response and the Yoon and Nelson mathematical models. More research work needs to be performed with complex industrial effluents aiming the optimization of the treatment systems to be applied in real context scenarios.

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Section: Discussionmentioning

confidence: 99%

Rehabilitation of a complex industrial wastewater containing heavy metals and organic solvents using low cost permeable bio-barriers – From lab-scale to pilot-scale

Silva

Rocha

Lago

et al. 2021

Separation and Purification Technology

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“…Besides cathodic reduction, heavy metal removal in abiotic cathodes was demonstrated via chemical precipitation and electrochemical reduction (Colantonio, 2016). In biocathodes, besides the mechanisms mentioned above; heavy metal removal were demonstrated to be induced via a number of other mechanisms that include bioreduction, bioaccumulation, biosorption, and biomineralization (Wu et al, 2017).…”

Section: Heavy Metal Removal Mechanismsmentioning

confidence: 99%

Challenges of Microbial Fuel Cell Architecture on Heavy Metal Recovery and Removal From Wastewater

et al. 2019

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“…Ex-situ remediation technology could remove the contaminants completely [10], but the costs are high and there is a risk of contaminants spreading. The in-situ remediation technology, especially the phytoremediation technology, was got more attentions recently, with its advantages of low cost [11], and without secondary pollution. Phytoremediation is a kind of bioremediation technology [13], removing pollutants from sediments by absorption, volatilization, transformation and degradation of plants and their rhizosphere microbial system [14].…”

Section: Introductionmentioning

confidence: 99%

Study on phytoremediation for heavy metal contaminated sediments by hydrophytes

Ma¹,

Zhang²,

Fan³

et al. 2020

E3S Web Conf.

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The remediation performances of heavy metals contaminaged sediment by hydrophytes including Alternanthera Philoxeroides, Canna indica L., Nymphaea tetragona, Typha orientalis, Phragmites australis, Phragmites australis, Hydrilla verticillata, Cyperus alternifolius L., Eichhornia crassipes, Acorus tatarinowii, Digitaria sanguinalis (L.) Scop were investigated through batch pot experiments. The results showed that the enrichment effect of Pb was better in Alternanthera Philoxeroides and Acorus tatarinowii with the BCFs of 4.42 and 1.22, and the TFs of 7.84 and 4.23, respectively. The Cr enrichment effects by Nymphaea tetragona, Hydrilla verticillata and Eichhornia crassipes (Mart.) Solms were better, which BCFs were 2.69, 1.91 and 3.71, and which TFs were 7.93, 2.07 and 2.18, respectively.

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Simultaneous removal of heavy metals and biodegradation of organic matter with sediment microbial fuel cells

Abstract: To in situ remediate rivers polluted by organic matter and heavy metals, lab-scale sediment microbial fuel cells (SMFCs) were operated under different conditions.

Cited by 48 publications

References 26 publications

Rehabilitation of a complex industrial wastewater containing heavy metals and organic solvents using low cost permeable bio-barriers – From lab-scale to pilot-scale

Rehabilitation of a complex industrial wastewater containing heavy metals and organic solvents using low cost permeable bio-barriers – From lab-scale to pilot-scale

Challenges of Microbial Fuel Cell Architecture on Heavy Metal Recovery and Removal From Wastewater

Study on phytoremediation for heavy metal contaminated sediments by hydrophytes

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