Efficient biodegradation of chlorophenols in aqueous phase by magnetically immobilized aniline-degrading Rhodococcus rhodochrous strain

Journal of Nanobiotechnology
Jianfeng HouBo Yu

Abstract

Chlorophenols are environmental contaminants, which are highly toxic to living beings due to their carcinogenic, mutagenic and cytotoxic properties. Bacterial degradation has been considered a cost-effective and eco-friendly method of removing chlorophenols, compared to the traditional physical-chemical processes. In this study, we first developed an efficient process for the biodegradation of chlorophenols by magnetically immobilized Rhodococcus rhodochrous cells. R. rhodochrous DSM6263 degrades chlorophenols following the first step of hydroxylation at the ortho-positions of chlorophenolic rings. The cells immobilized by k-carrageenan with 9 g/L Fe3O4 nanoparticles could efficiently degrade 2-chlorophenol, 4-chlorophenol, 2,3-dichlorophenol and their mixture, which were even higher than those by free cells. The magnetically nanoparticle-immobilized cells could be used at least for six cycles. Given the much easier separation by an external magnetic field and high degradation efficiency, this study provides a promising technique for improving biocatalysts used in the bioremediation process for chlorophenols in wastewater.

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Citations

Aug 30, 2016·International Journal of Environmental Research and Public Health·Alexis NzilaJesse Zhu
Jun 21, 2018·Environmental Technology·Maegala Nallapan ManiyamAnthony E G Cass
Aug 20, 2020·World Journal of Microbiology & Biotechnology·Ebtesam El BestawyAbdelazeem Saad Eltaweil
May 3, 2019·Applied Microbiology and Biotechnology·Maria Pilar SerbentLorena Benathar Ballod Tavares
Mar 6, 2019·Frontiers in Microbiology·Yitayal Shiferaw Anteneh, Christopher Milton Mathew Franco
Aug 10, 2020·Environmental Science and Pollution Research International·Karen MagnoliCarla Lorena Barberis

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