TY - JOUR
T1 - Interrelation between sulphur and conductive materials and its impact on ammonium and organic pollutants removal in electroactive wetlands
AU - Srivastava, Pratiksha
AU - Abbassi, Rouzbeh
AU - Yadav, Asheesh Kumar
AU - Garaniya, Vikram
AU - Lewis , Trevor
AU - Zhao, Yaqian
AU - Aminabhavi, Tejraj
PY - 2021/10/5
Y1 - 2021/10/5
N2 - 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.
AB - 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.
KW - Microbial fuel cell
KW - Constructed wetland
KW - Constructed-wetland microbial fuel cell
KW - Sulphate wastewater
KW - Electricity generation
UR - http://www.scopus.com/inward/record.url?scp=85108433390&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2021.126417
DO - 10.1016/j.jhazmat.2021.126417
M3 - Article
C2 - 34174621
SN - 0304-3894
VL - 419
SP - 1
EP - 12
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 126417
ER -