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Interrelation between sulphur and conductive materials and its impact on ammonium and organic pollutants removal in electroactive wetlands

Citation

Srivastava, P and Abbassi, R and Yadav, AK and Garaniya, V and Lewis, T and Zhao, Y and Aminabhavi, T, Interrelation between sulphur and conductive materials and its impact on ammonium and organic pollutants removal in electroactive wetlands, Journal of Hazardous Materials, 419 Article 126417. ISSN 0304-3894 (2021) [Refereed Article]


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DOI: doi:10.1016/j.jhazmat.2021.126417

Abstract

This investigation is the first of its kind to evaluate the interrelation of sulphate (SO42-) with conductive materials as well as their individual and synergetic effects on the removal of ammonium and organic pollutants in electroactive wetlands, also known as constructed wetland (CW) - microbial fuel cell (MFC). The role of MFC components in CW was investigated to treat the sulphate containing wastewater under a long-term operation without any toxicity build-up in the system. A comparative study was also performed between CW-MFC and CW, where sulphate containing wastewater (S-replete) and without sulphate wastewater (S-deplete) was assessed. The S-replete showed high NH4+ removal than the S-deplete, and the requesnce of removal was: CW-MFC-replete > CW-MFC-deplete > CW-replete > CW-deplete. The chemical oxygen demand (COD) removal was high in the case of CW-MFC-replete, and the sequence of removal was CW-MFC-replete > CW-MFC-deplete > CW-deplete > CW-replete. X-ray photon spectroscopic study indicates 0.84% sulphur accumulation in CW-MFC-replete and 2.49% in CW-replete, indicating high sulphur precipitation in CW without the MFC component. The high relative abundance of class Deltaproteobacteria (7.3%) in CW-MFC-replete along with increased microbial diversity (Shannon index = 3.5) rationalise the symbiosis of sulphate reducing/oxidising microbes and its impact on the treatment performance and electrochemical activity.

Item Details

Item Type:Refereed Article
Keywords:microbial fuel cell, constructed wetland, constructed-wetland microbial fuel cell, sulphate wastewater, electricity generation
Research Division:Engineering
Research Group:Chemical engineering
Research Field:Electrochemical energy storage and conversion
Objective Division:Commercial Services and Tourism
Objective Group:Water and waste services
Objective Field:Water recycling services (incl. sewage and greywater)
UTAS Author:Srivastava, P (Miss KM Pratiksha Srivastava)
UTAS Author:Abbassi, R (Dr Rouzbeh Abbassi)
UTAS Author:Garaniya, V (Associate Professor Vikram Garaniya)
UTAS Author:Lewis, T (Associate Professor Trevor Lewis)
ID Code:145072
Year Published:2021
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-06-29
Last Modified:2021-07-19
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