Nanoparticles coupled with microorganisms mediated photocatalytic mineralization, detoxification and disinfection of phenolic waste water
Journal Title: INTERNATIONAL JOURNAL OF RECENT TRENDS IN SCIENCE AND TECHNOLOGY - Year 2018, Vol 26, Issue 2
Abstract
Solarphotocatalysis is an important aspect of AOPs for the treatment of organic pollutants in industrial wastewater. The photocatalytic activity of Zinc Oxide nanoparticles also prove to be an efficient method for degradation of organic compounds and also have their lethal activity on microbial species. This study aimed at mineralization of phenol in wastewater, its disinfection and detoxification using the photocatalytic activity of ZnO andthe biodegrading ability of phenol degrading organisms. This had been successful in decreasing treatment time, cost effective, environment friendly and increased efficiency. The ZnO nanoparticles were synthesized chemically and characterized by UV-VIS spectroscopy and FTIR. Phenol degrading organisms were isolated and screened from soil sample. The coupled action of synthesized ZnO nanoparticles and phenol degrading microorganisms was studied under solar radiations for five consecutive days. The concentration of phenol analysed was degraded upto 93.4%. The COD and BOD were reduced upto 90.84% and 81.15% respectively. The reduction in TOC from 585 to 137mg/L represents mineralization of phenol and the by-products formed during its degradation. Pot culture and seed germination bioassays showed the reduction in toxicity of phenol after treatment by 60%. Reduction in TVC of coliforms during treatment confirmed lethal effect of ZnO and solar radiations.After treatment the photocatalyst was recovered, regenerated and reused effectively showing no significant reduction in photocatalytic activity and photodegradation of phenol.
Authors and Affiliations
A D Bholay, Sayali Khairnar, Ayushi Bhagwat
Keywords
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- EP ID EP493806
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