Optimization ofS/Fe ratio for enhanced nitrobenzene biological removal in anaerobicSystem amended withSulfide-modified nanoscale zerovalent iron

Dejin Zhang; Yang Li; Aiwu Sun; Siqi Tong; Xinbai Jiang; Yang Mu; Jiansheng Li; Weiqing Han; Xiuyun Sun; Lianjun Wang; Jinyou Shen

doi:10.1016/j.chemosphere.2020.125832

Optimization ofS/Fe ratio for enhanced nitrobenzene biological removal in anaerobicSystem amended withSulfide-modified nanoscale zerovalent iron

Chemosphere. 2020 May:247:125832. doi: 10.1016/j.chemosphere.2020.125832. Epub 2020 Jan 8.

Authors

Dejin Zhang¹, Yang Li², Aiwu Sun³, Siqi Tong², Xinbai Jiang⁴, Yang Mu⁵, Jiansheng Li², Weiqing Han², Xiuyun Sun², Lianjun Wang², Jinyou Shen⁶

Affiliations

¹ Department of Environmental Engineering, College of Resources and EnvironmentalSciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University ofScience and Technology, Nanjing, 210094, China.
² Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University ofScience and Technology, Nanjing, 210094, China.
³ Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaiyin, 223001, Jiangsu Province, China.
⁴ Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University ofScience and Technology, Nanjing, 210094, China. Electronic address: [email protected].
⁵ CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University ofScience and Technology of China, Hefei, 230026, China.
⁶ Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University ofScience and Technology, Nanjing, 210094, China. Electronic address: [email protected].

PMID: 31931312
DOI: 10.1016/j.chemosphere.2020.125832

Abstract

Anaerobic reduction of nitrobenzene (NB) can be efficiently enhanced bySupplementing withSulfide-modified nanoscale zerovalent iron (S-nZVI). In thisStudy,S/Fe ratio ofS-nZVI was further optimized for enhancing biological NB removal in anaerobicSystem amended withS-nZVI and inoculated by anaerobicSludge. The results indicated that the performance andStability of the coupled anaerobicSystem for NB reduction and aniline formation were remarkably improved byS-nZVI atS/Fe molar ratio of 0.3 (0.3S-nZVI). TheSecretion of extracellular polymericSubstances (EPS), transformation of volatile fatty acids (VFAs), yield of methane and activity ofSeveral key enzymes could be efficiently improved by 0.3S-nZVI. Furthermore,Species related to NB reduction, fermentation, electroactivity and methanogenesis could be enriched in 0.3S-nZVI coupled anaerobicSystem, with remarkable improvement in the biodiversity observed. ThisStudy demonstrated thatSulfidation would be a promising method to improve the performance of nZVI in coupled anaerobicSystems for the removal of recalcitrant nitroaromatic compounds from wastewater.

Keywords: Anaerobic reduction; Microbial community; Nanoscale zerovalent iron; Nitrobenzene; ulfidation.

MeSH terms

Anaerobiosis
Extracellular Polymeric Substance Matrix / metabolism
Iron / analysis*
Iron / pharmacology
Methane / biosynthesis
Methane / metabolism
Nitrobenzenes / isolation & purification*
Nitrobenzenes / metabolism
Sulfides / analysis*
Sulfides / pharmacology
Wastewater / chemistry
Water Pollutants, Chemical / analysis
Water Pollutants, Chemical / metabolism*

Substances

Nitrobenzenes
Sulfides
Waste Water
Water Pollutants, Chemical
Iron
nitrobenzene
Methane