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Recovery of chromium, copper and vanadium combined with electricity generation in two-chambered microbial fuel cells.
FEMS Microbiology Letters ( IF 2.1 ) Pub Date : 2020-08-05 , DOI: 10.1093/femsle/fnaa129
Kartik S Aiyer 1
Affiliation  

Microbial fuel cells (MFCs) offer a promising solution towards recovery and treatment of heavy metal pollutants. In this study, two-chambered MFCs were employed for recovery of chromium, copper and vanadium (Cr (VI), Cu (II) and V (V)). One g/L concentrations of K2Cr2O7, CuCl2 and NaVO3 served as catholytes, while a mixed culture was used as anolyte. Cr (VI), Cu (II) and V (V) were reduced biologically into less toxic forms of Cr (III), Cu and V (IV) respectively. Power density and cathodic efficiency were calculated for each of the catholytes. Cr (VI) gave the maximum power density and cathodic efficiency due to its high redox potential. Current produced depended on the concentration of the catholyte. Over a period of time, biological reduction of catholytes lead to decrease in the metal concentrations, which demonstrated the application of MFC technology towards heavy metal treatment and recovery in a reasonably cost-effective manner.

中文翻译:

两室微生物燃料电池中铬,铜和钒的回收与发电的结合。

微生物燃料电池(MFCs)为重金属污染物的回收和处理提供了有希望的解决方案。在这项研究中,采用了两室MFCs回收铬,铜和钒(Cr(VI),Cu(II)和V(V))。1 g / L浓度的K 2 Cr 2 O 7,CuCl 2和NaVO 3用作阴极电解液,而混合培养物用作阳极电解液。Cr(VI),Cu(II)和V(V)在生物学上分别还原为毒性较低的Cr(III),Cu和V(IV)形式。计算每种阴极电解液的功率密度和阴极效率。Cr(VI)具有高氧化还原电势,因此具有最大的功率密度和阴极效率。产生的电流取决于阴极电解液的浓度。在一段时间内,阴极电解液的生物还原导致金属浓度降低,这表明MFC技术以合理的成本效益方式应用于重金属处理和回收。
更新日期:2020-08-11
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