title: Bioelectrochemical treatment of acid mine drainage (AMD) from an abandoned coal mine under aerobic condition.
abstract: In this study, a bioelectrochemical system (BES) was used to treat acid mine drainage (AMD) from an abandoned coal mine in the cathode chamber under aerobic condition. Activated sludge from a local wastewater treatment plant was used in the anode chamber of the BES to supply electrons to the treatment. After 7days, the pH of the cathode solution enhanced from 2.5 to 7.3. More than 99% of Al, Fe and Pb were removed, and removal rates of 93%, 91%, 89% and 69% were achieved for Cd, Zn, Mn and Co respectively with biocathode. Energy-dispersive X-ray spectroscopy (EDS) study revealed the deposition of the various types of metals on the cathode surface, and some metals were detected in the precipitates of the cathode chamber. The bacteria for AMD treatment was identified to be Serratia spp. using 16s rRNA gene amplification and sequencing. Scanning electron microscopy showed attached growth of the bacteria on the cathode. The bioelectrochemical treatment of the AMD was also compared with the biological treatment in a continuously stirred batch reactor (CSBR).
authors.affiliation: Department of Civil and Environmental Engineering, Southern Illinois University, Carbondale, IL, 62901, USA.
authors.forename: Meisam
authors.initials: M
authors.lastname: Peiravi
authors.affiliation: Department of Civil and Environmental Engineering, Southern Illinois University, Carbondale, IL, 62901, USA.
authors.forename: Shekhar R
authors.initials: SR
authors.lastname: Mote
authors.affiliation: Department of Mining and Mineral Resources Engineering, Southern Illinois University, Carbondale, IL, 62901, USA.
authors.forename: Manoj K
authors.initials: MK
authors.lastname: Mohanty
authors.affiliation: Department of Civil and Environmental Engineering, Southern Illinois University, Carbondale, IL, 62901, USA. Electronic address: jialiu@siu.edu.
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
mesh_terms: D000143:Acids / Q000737:chemistry*; D000332:Aerobiosis; D001673:Biodegradation, Environmental; D019149:Bioreactors; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000302:isolation & purification; D008855:Microscopy, Electron, Scanning; D008906:Mining; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012705:Serratia / Q000235:genetics / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D012722:Sewage; D013052:Spectrometry, X-Ray Emission; D062065:Wastewater
chemical_list: D000143:Acids; D019216:Metals, Heavy; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D062065:Wastewater
keywords: Acid mine drainage; Biocathode; Bioelectrochemical; Toxic metal