壳聚糖/改性平菇复合吸附剂对Cr(VI)的吸附特性

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Abstract Chitosan-Pleurotus ostreatus composite adsorbent (CMPOD) was prepared by using chitosan and tartaric acid modified Pleurotus ostreatus, and applied for Cr(VI) removal from solutions. The results showed that Cr(VI) adsorption capacity decreased with the increase of pH value in the pH range of 2~10. Cr(VI) adsorption capacity increased with the increase of initial Cr(VI) concentration and temperature. The adsorption capacity reached over 190mg/g for 600mg/L Cr(VI) at 50℃. The adsorption process followed the pseudo-second-order kinetic model and Freundlich isotherm. Thermodynamic analysis showed that the adsorption process was spontaneous and endothermic. An abundant web structure was observed in the adsorbent by SEM. The pores in the web structure were filled and Cr(VI) peak appeared in EDS spectra after Cr(VI) adsorption. FTIR spectra demonstrated that amino group in chitosan was introduced into the adsorbent and was the dominant group for Cr(VI) adsorption.

Key words： chitosan Pleurotus ostreatus composite adsorbent Cr(VI) adsorption

Received: 07 January 2019

PACS:

X703.5

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	WANG Shu-fan
	XU Wei-hua
	LIU Yun-guo
	LI Xin
	ZHANG Wei

Cite this article:

WANG Shu-fan,XU Wei-hua,LIU Yun-guo等. Characteristics of Cr(VI) removal by cross-linked chitosan/tartaric acid modified Pleurotus ostreatus composite adsorbent[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3264-3270.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I8/3264

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