An integrated approach of bioleaching-enhanced electrokinetic remediation of heavy metals from municipal waste incineration fly ash using Acidithiobacillus spp

Frontiers in Environmental Science

Environmental Science

Tabarak Malik¹  R. Rajakrishnan²  Jayaraman Narenkumar³  Bhaskar Das³  Aruliah Rajasekar⁴  Rajaram Rajamohan⁵  Kuppusamy Sathishkumar⁶ 

[1] Department of Biomedical Sciences, Institute of Health, Jimma University, Jimma, Ethiopia;Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia;Department of Environmental and Water Resources Engineering, School of Civil Engineering (SCE), Vellore Institute of Technology, Vellore, India;Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, India;Organic Materials Synthesis Lab, School of Chemical Engineering, Yeungnam University, Gyeongsan, Republic of Korea;Rhizosphere Biology Laboratory, Department of Microbiology, Bharathidasan University, Tiruchirappalli, India;Department of Computational Biology, Institute of Bioinformatics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Thandalam, Tamil Nadu, India;

关键词: fly ash;    A.ferrooxidans;    municipal solid waste;    electro-kinetic;    integrated approach;   

DOI  :  10.3389/fenvs.2023.1273930

 received in 2023-08-07, accepted in 2023-09-05,  发布年份 2023

来源: Frontiers

【 摘 要 】

Introduction: Municipal solid waste (MSW) incineration fly ash is a harmful residue formed during the incineration process. It contains high concentrations of hazardous heavy metals, such as lead, zinc, aluminum, and iron.Methodology: In this study, bioleaching integrated with an electrokinetic approach for heavy metal remediation from MSW incineration fly ash using Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans bacteria was tested.Results and discussion: The physicochemical properties of fly ash included a particle size of 26.1 μm, with the presence of heavy metals. A. ferrooxidans and A. thiooxidans produced sulphuric acid (0.0289 M and 0.0352 M) during the proliferation; this acid enhances the bioleaching of heavy metals from fly ash. The results of an integrated approach showed an 85%, 47%, 92%, 85%, 46%, 67% 11%, and 55% removal of the heavy metals K, Na, Ca, Mg, Al, Zn, Pb, and Mg, respectively, in the presence of A. ferrooxidans. Overall, these results evidenced that heavy metals were completely removed from the fly ash using an integrated approach. Therefore, this integrated approach can be used as an effective heavy metal removal method for treating fly ash in MSW.

【 授权许可】

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Copyright © 2023 Narenkumar, Sathishkumar, Das, Rajasekar, Rajakrishnan, Rajamohan and Malik.