外源硫诱导下的<i>Desulfovibrio desulfuricans sub</i> sp.EPS特性及对Zn(Ⅱ)的吸附

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Abstract In this paper, the effect of exogenous sulfur (Na₂SO₄, Na₂SO₃, Na₂S₂O₃·5H₂O) stress/induction on extracellular polymeric substances(EPS) of Desulfovibrio desulfuricans sub sp. (D. desulfuricans sp.) was studied. The results showed that addition of 0.50g/L Na₂SO₃ led to the highest EPS yield of 2104.39mg/g VSS (1888.52mg/g VSS of protein content), which was 300% higher than that without Na₂SO₃ addition, and as a result, 98.17% increase in Zn(II) adsorption capacity (954.4mg/g EPS) achieved. Three-dimensional fluorescence (3D-EEM) spectral results showed that tyrosine-like substances in EPS were greatly increased after sulfur stress/induction; Fourier transform infrared spectroscopy (FTIR) results showed that significant increases in functional groups such as —OH, C=O, C—O—C EPS were mainly responsible for the enhance adsorption of Zn(II); The results of X-ray photoelectron spectroscopy (XPS) results showed that the content of C—O/C—N, C=N and oxygen-containing functional group (X) in EPS increased after sulfur stress/induction (Na₂SO₃ and Na₂S₂O₃·5H₂O).

Key words： exogenous sulfur stress/induction EPS Zn(Ⅱ)

Received: 18 April 2022

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X172

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	Articles by authors
	GAN Yu
	SONG Wei-feng
	YANG Zuo-yi
	LIAN Ze-yang
	MA Shuang-nian
	HUANG Xiang-wu
	YANG Ren-gao
	WEN Yan-biao

Cite this article:

GAN Yu,SONG Wei-feng,YANG Zuo-yi等. The EPS characteristics of Desulfovibrio desulfuricans sub sp. and its adsorption performance for Zn(Ⅱ) under exogenous sulfur induction[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(11): 5144-5152.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I11/5144

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