Microbial Fuel Cell Bio-Remediation of Lambda Cyhalothrin, Malathion and Chlorpyrifos on Loam Soil Inoculated With Bio-Slurry
Journal: Journal of Bioremediation and Biodegradation (Vol.13, No. 5)Publication Date: 2022-05-30
Authors : Kinyua A Mbugua JK Mbui D.N Kithure J.L Wandiga S.O Wandiga S.O; Waswa A.G;
Page : 1-6
Keywords : Bioremediation; Bio-slurry; Loam soil; Microbial Fuel Cells; Pesticides;
Abstract
Introduction: In microbial fuel cell technology, the substrate is consumed by microbes in anaerobic conversion of substrate to electricity. Bio-remediation of pollutants involves microbial environmental cleanup using green approach. Problem: The primary problems with pesticides are linked to the non-negligible proportion of the sprayed active ingredient that does not reach its intended target thereby contaminating environmental compartments persistently. Objective: The primary objective of this study was to assess the potential of microbial fuel cell technology in bioremediation of lambda cyahlothrin, chlorpyrifos and malathion in Limuru loam soil. Method: H-shaped double chamber microbial fuel cell was fabricated where the anodic chamber was loaded with 750 mL loam soil inoculated with 750 mL bio-slurry doped with 10 mL of 10 ppm lambda cyhalothrin, chlorpyrifos and malathion pesticide solutions. The cathodic chamber was loaded with 1500 mL distilled water. The setup was incubated for a 90 days retention time where voltage and current were recorded daily using a multi-meter. The degradation level was assessed using a GC-MS after sample extraction using standard QuEChERs method. Results: The voltage generated from the pesticide doped loam soil showed an upward trend from day 0 to day 15 in lambda cyhalothrin and malathion and from day 0 to day 20 in chlorpyrifos and pesticide mixture after which constant readings were observed for three days with downward trends thereafter. The maximum generated voltage was 0.537 V, 0.571 V, 0.572 V and 0.509 V in chlorpyrifos, lambda cyhalothrin, malathion and pesticide mix (MCL) respectively. The bioremediation levels for chlorpyrifos and malathion were 65.80% and 71.32%, respectively while no detectable, lambda cyhalothrin was observed after day 60 of the study. Conclusion: This study concludes that bioremediation of lambda cyhalothrin, chlorpyrifos and malathion in Limuru loam soil can be achieved using microbial fuel cells.
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