Approaching electrodes configurations in bio-electrokinetic deoiling of petrochemical contaminated soil

Show simple item record Gidudu, Brian Chirwa, Evans M.N. 2020-04-29T07:06:26Z 2020-04-29T07:06:26Z 2019-10-25
dc.description.abstract The expeditious growth of the petroleum industry and its products in the last three decades has led to increased pollution of soil which is of great concern considering the effects it poses to the environment. Oil waste usually considered as hazardous due to its composition presents the same problems as other petroleum-based products to the environment. An electrokinetic reactor with an inoculum of biosurfactant producing bacteria was studied at a bench scale with different electrode spacing configurations. A DC powered electrokinetic reactor consisting of electrode/electrolyte compartments, and a matrix chamber was operated under a constant voltage of 30 V with configurations of fixed electrodes spacing’s of 335 mm, 260 mm,185 mm and continuous approaching electrodes at 335 mm, 260 mm and 185 mm. The biosurfactant producing microbes and cell-free biosurfactant were introduced in the matrix chamber after which the reactor was left to run for 10 days under the electric field. The electroosmotic flow, electrical current, pH and biodegradation of the hydrocarbons in the soil were observed and assessed. The current in the reactor was highest with the least electrode distance of 185 mm. The increase in current led to a directly proportional increase in the electroosmotic flow towards the cathode leading to the increased coalescence of the oil from the soil as compared to the other electrode distances. The analysis of the results showed a reduction in the total carbon content in the soil with viable oil recovery rates for all the electrode distances with 185 mm being the most effective. The viable cell counts in the reactor showed significant growth of the bacteria in the first 6 days under the applied voltage of 30 V enabling the biodegradation of the petrochemical pollutants by the strain for all the four different electrode configurations. en_ZA
dc.description.department Chemical Engineering en_ZA
dc.description.librarian am2020 en_ZA
dc.description.sponsorship The National Research Foundation (NRF_DST). en_ZA
dc.description.uri en_ZA
dc.identifier.citation Gidudu B., Chirwa E.M.N., 2019, Approaching Electrodes Configurations in Bio-Electrokinetic Deoiling of Petrochemical Contaminated Soil, Chemical Engineering Transactions, 76, 199-204 DOI: 10.3303/CET1976034. en_ZA
dc.identifier.issn 2283-9216 (online)
dc.identifier.other 10.3303/CET1976034
dc.language.iso en en_ZA
dc.publisher The Italian Association of Chemical Engineering en_ZA
dc.rights © 2019, AIDIC Servizi S.r.l. en_ZA
dc.subject Voltage en_ZA
dc.subject Viable cell counts en_ZA
dc.subject Petroleum industry en_ZA
dc.subject Pollution of soil en_ZA
dc.subject Petrochemical contaminated soil en_ZA
dc.subject Electrodes en_ZA
dc.subject Configuration en_ZA
dc.subject Bio-electrokinetic deoiling en_ZA
dc.title Approaching electrodes configurations in bio-electrokinetic deoiling of petrochemical contaminated soil en_ZA
dc.type Article en_ZA

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