Effect of heavy metals and other xenobiotics on biodegradation of waste canola oil by cold-adapted Rhodococcus sp. strain AQ5-07
Document Type
Article
Publication Date
9-1-2020
Abstract
The Antarctic is generally considered to be one of the most pristine areas in the world. However, both long and short-range pollutants are now known to be present in the Antarctic environment. Canola oil is an example of a polluting hydrocarbon that can be accidentally released into the Antarctic environment in oil wastewater treatment plants. The Antarctic soil bacterial strain Rhodococcus sp. AQ5-07, known to be capable of using waste canola oil (WCO) as its sole source of carbon, was tested for its ability to degrade canola oil in the presence of different heavy metals and xenobiotics. Rhodococcus sp. AQ5-07 was grown on minimum salt media containing different heavy metals (Zn, Co, Ni, Ag, Pb, Cu, Cr, Hg, Cd and As), xenobiotics (acrylamide and phenol) supplemented with 3% WCO. Three out of the 10 heavy metals tested (Hg, Cd and Ag) led a significant reduction in canola oil degradation at a concentration of 1 ppm. The IC50 values of Hg, Cd and Ag were 0.38, 0.45 and 0.32 ppm, respectively. The strain could also withstand 10 mg/L acrylamide, 50 mg/L phenol and 0.5% (v/v) diesel. This study confirmed the ability of Rhodococcus sp. AQ5-07 to degrade canola oil in the presence of various heavy metals and other xenobiotics, supporting its potential use in bioremediation of vegetable oil and wastewater treatments in low temperature environments.
Keywords
Arctica, biodegradation, canola oil, heavy metals, Rhodococcus, xenobiotics
Divisions
ocean
Funders
Bayero University,Centro de Investigacion y Monitoreo Ambiental Ant?rctico,Instituto Ant?rtico Chileno,National Antarctic Research Centre,Teniente Coronel Jose Ignacio Alvarado Camps,Yayasan Penyelidikan Antartika Sultan Mizan,Natural Environment Research Council,National Eye Research Centre,Universiti Putra Malaysia,Tertiary Education Trust Fund
Publication Title
Revista Mexicana De Ingenieria Quimica
Volume
19
Issue
3
Publisher
Univ Autonoma Metropolitana-iztapalapa
Publisher Location
C/O DR JAIME VERNON-CARTER, SAN RAFAEL ATLIXCO NO 186, COL VICENTINA, DELEGACION IZTAPALAPA, MEXICO, 09340, MEXICO