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Arsenic biosorption using pretreated biomass of psychrotolerant Yersinia sp. strain SOM-12D3 isolated from Svalbard, Arctic

Asadi Haris, Somayeh and Altowayti, Wahid Ali Hamood and Ibrahim, Zaharah and Shahir, Shafinaz (2018) Arsenic biosorption using pretreated biomass of psychrotolerant Yersinia sp. strain SOM-12D3 isolated from Svalbard, Arctic. Environmental Science and Pollution Research, 25 (28). pp. 27959-27970. ISSN 0944-1344

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Official URL: http://dx.doi.org/10.1007/s11356-018-2799-z

Abstract

A Gram-negative, arsenite-resistant psychrotolerant bacterial strain, Yersinia sp. strain SOM-12D3, was isolated from a biofilm sample collected from a lake at Svalbard in the Arctic area. To our knowledge, this is the first study on the ability of acid-treated and untreated, non-living biomass of strain SOM-12D3 to absorb arsenic. We conducted batch experiments at pH 7, with an initial As(III) concentration of 6.5 ppm, at 30 °C with 80 min of contact time. The Langmuir isotherm model fitted the equilibrium data better than Freundlich, and the sorption kinetics of As(III) biosorption followed the pseudo-second-order rate equation well for both types of non-living biomass. The highest biosorption capacity of the acid-treated biomass obtained by the Langmuir model was 159 mg/g. Further, a high recovery efficiency of 96% for As(III) was achieved using 0.1 M HCl within four cycles, which indicated high adsorption/desorption. Fourier transformed infrared (FTIR) demonstrated the involvement of hydroxyl, amide, and amine groups in As(III) biosorption. Field emission scanning electron microscopy–energy dispersive analysis (FESEM-EDAX) indicated the different morphological changes occurring in the cell after acid treatment and arsenic biosorption. Our results highlight the potential of using acid-treated non-living biomass of the psychrotolerant bacterium, Yersinia sp. Strain SOM-12D3 as a new biosorbent to remove As(III) from contaminated waters.

Item Type:Article
Uncontrolled Keywords:arctic, arsenic, biosorption, metal recovery, pretreated biomass, psychrotolerant, svalbard, yersinia sp
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Biosciences and Medical Engineering
ID Code:84486
Deposited By: Yanti Mohd Shah
Deposited On:11 Jan 2020 15:31
Last Modified:11 Jan 2020 15:31

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