Reading: Phenol degradation by Acinetobacter sp. in the presence of heavy metals

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Phenol degradation by Acinetobacter sp. in the presence of heavy metals

Authors:

SA Ahmad ,

MY
About SA
Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia.
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NA Shamaan,

MY
About NA
Faculty of Medicine and Health Sciences, Universiti Sains Islam Malaysia, Kuala Lumpur, Malaysia.
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MA Syed,

MY
About MA
Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia.
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FA Dahalan,

MY
About FA

The School of Environmental Engineering, Universiti Malaysia Perlis, Perlis, Malaysia.

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K Abdul Khalil,

MY
About K Abdul
Biomolecular Science Program, School of Biology, Faculty of Applied Sciences, Universiti Teknologi MARA, Selangor, Malaysia.
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NA Ab Rahman,

MY
About NA

Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia.

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MY Shukor

MY
About MY

Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia.

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Abstract

The purpose of this study was to investigate the ability of Acinetobacter sp. strain AQ5NOL 1 immobilised in gellan gum beads to degrade phenol in the presence of heavy metals. Seven different heavy metals, namely, As5+, Cu2+, Cd2+, Ni2+, Cr6+, Pb2+, and Hg2+ at 1 ppm were tested. Results of the study showed that degradation of phenol by free cells was inhibited by Hg2+, Cu2+ and Cr6+ after 48 hours of incubation by 97.91 %, 77.58 % and 75.26 %, respectively. Only Hg2+ and Cr6+ inhibited phenol degradation by immobilised Acinetobacter cells in 18 hours by 67.55 % and 53.19 %. Phenol degradation by immobilised cells was affected when Cr6+ and Hg2+ concentrations exceeded 0.5 and 0.1 ppm, respectively. However, inhibitory effects of heavy metals can be overcome by prolonging the incubation time for immobilised Acinetobacter sp. strain AQ5NOL 1 from 18 hours to 24 and 30 hours for Cr6+ (46.80 %) and Hg2+ (21.40 %), respectively.

How to Cite: Ahmad, S. et al., (2017). Phenol degradation by Acinetobacter sp. in the presence of heavy metals. Journal of the National Science Foundation of Sri Lanka. 45(3), pp.247–253. DOI: http://doi.org/10.4038/jnsfsr.v45i3.8189
Published on 26 Sep 2017.
Peer Reviewed

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