Cathode potential regulation in a coupled bioelectrode-anaerobic sludge system for effective dechlorination of 2,4-dichloronitrobenzene

Recent advances in electrocatalysts for halogenated organic pollutant degradation

“…224 The coupling can upgrade the overall degradation performance toward HOPs due to the synergy between different sophisticated processes. 224,225 Fenton reaction, 87,226 membrane filtration, 227,228 biological treatment, 225,229 photocatalysis, 230,231 ozonation, 225,232 adsorption, 225,233 ultrasound, 230,234 UV irradiation, 230,235 microwave, 236 and thermolysis 237,238 are the widely reported methods that can assist the electrochemical activity of electrocatalysis. In this part of the review, the first four methods are detailed due to their wide applications.…”

“…Bioelectrochemical systems (BESs) which based on the integration of the biological process and the electrochemical method have attracted increasing attention in the HOPs degradation process because the BES process possesses high degradation efficiency, low operational cost, environmental sustainability, high selectivity, ambient operating conditions and reusable effluents. 242,250 In a typical study, a coupled microbial electrosynthesis-upflow anaerobic sludge reactor (MES-UASB) was established to mineralize 2,4-dichloronitrobenzene, 229 and the experimental results indicated that the coupled MES-UASB obtained a high dechlorination efficiency (100%) at -660 mV in 12h. More information involves this topic can be found in pervious reviews and chapters.…”

Optimization of a bioelectrochemical system for 2,4-dichloronitrobenzene transformation using response surface methodology

“…Chloronitrobenzenes (ClNBs), a kind of important raw material used in the pharmaceutical, dye and pesticide industries, are toxic compounds with mutagenic, carcinogenic and teratogenic effects. 1,2 They pose a serious threat to human beings and livestock by causing liver disease, hemolytic anemia, etc. 3 Bioelectrochemical conversion, which combines biodegradation with electrochemical reduction, has been proven to be an alternative method for contaminant detoxication in recent years.…”

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

“…Biocathodes can degrade many substances such as high‐strength sulfate wastewater, heavy metals, sulfate, p‐nitrophenol, and p‐chloronitrobenzene . To enhance the dechlorination of 2,4‐dichloronitrobenzene, a coupled microbial electrosynthesis‐upflow anaerobic sludge reactor was developed by Chen et al . The results indicated that biocathodes at a lower potential are favorable for the enrichment of dechlorination‐related microbes.…”

“…Biocathodes can degrade many substances such as high-strength sulfate wastewater, 155 heavy metals, 156 sulfate, 157 p-nitrophenol, 158 and p-chloronitrobenzene. 159 To enhance the dechlorination of 2,4-dichloronitrobenzene, a coupled microbial electrosynthesis-upflow anaerobic sludge reactor was developed by Chen et al 160 The results indicated that biocathodes at a lower potential are favorable for the enrichment of dechlorination-related microbes. Moreover, Huang et al 161 found that the biocathode can considerably accelerate the electron transfer and obtain a lower potential, thus enhancing the decolorization of azo dye-Congo red by the improvement of cathodic action in membrane-free microbial electrolysis cells.…”