当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES期刊下所有文献 > Chromium (VI) detoxification by oxidation and flocculation of exopolysaccharides from Arthrobacter sp. B4.

Chromium (VI) detoxification by oxidation and flocculation of exopolysaccharides from Arthrobacter sp. B4.

Abstract：

:The exopolysaccharides from Arthrobacter sp. B4 (B4-EPS) exhibited an excellent chromium (VI) (Cr(VI)) removal capability without any pH adjustment, whereby 50mgL(-1) of Cr(VI) could be completely removed by 4gL(-1) of B4-EPS. The kinetics tests revealed that the first-order rate constant was 8.3×10(-5)s(-1) and the optimal reaction time was 720min. However, a low initial concentration of Cr(VI) (5-30mgL(-1)) would accelerate the reaction rate of Cr(VI) removal and shorten reaction time to less than 360min. Meanwhile, the X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible (UV-vis) spectra indicated that Cr(VI) was reduced to Cr(III) by B4-EPS in accordance with the emergence of the green reaction products. Furthermore, the Fourier transform-infrared spectra (FT-IR) and nuclear magnetic resonance (NMR) showed that carboxyl and hydroxyl groups of B4-EPS contributed to Cr(VI) reduction. Additionally, a feasible scheme for Cr(VI) detoxification by oxidation and flocculation of B4-EPS is presented.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Li Y,Li Q,Fengying Y,Bao J,Hu Z,Zhu W,Zhao Y,Lin Z,Dong Q

doi

10.1016/j.ijbiomac.2015.07.013

subject

Has Abstract

pub_date

2015-11-01 00:00:00

pages

235-40

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(15)00474-2

journal_volume

81

pub_type

杂志文章

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