SnS2/α-Al2O3对酸性废水中汞离子的去除机制

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Abstract Sulfur-based adsorbents had good affinity to mercury when using for mercury ions capture. The SnS₂/α-Al₂O₃ composite was successfully prepared and used as adsorbents for Hg²⁺ removal. The adsorption experimental results indicated that the maximum adsorption capacity of such composite was 950mg/g. The Hg²⁺ removal efficiencies were not influenced by pH values. It can achieve nearly 100% mercury removal efficiencies under the pH values of 1~6 (Hg²⁺:65mg/L). In addition, the coexisting metal ions (Cd²⁺, Cr³⁺, Zn²⁺, Cu²⁺, Pb²⁺, Ni²⁺, Co²⁺) had no significant influences on mercury adsorption rate and efficiencies (Hg²⁺:1mmol/L). Therefore, it confirmed that SnS₂/α-Al₂O₃ composite had a good stability under acidic condition. The adsorption process followed a monolayer chemical adsorption mechanism. Moreover, the composite can be regenerated and recycled using a hydrochloric acid treatment method.

Key words： sulfur-based material adsorbent acid wastewater mercury ion layered structure

Received: 12 January 2019

PACS:

X703.5

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	Articles by authors
	CHEN Li-hong
	XU Hao-miao
	YANG Bo
	LIU Xiao-shuang
	LIU Ping
	QU Zan
	YAN Nai-qiang

Cite this article:

CHEN Li-hong,XU Hao-miao,YANG Bo等. Mechanisms of mercury ions removal from acid wastewater by SnS₂/ α-Al₂O₃[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3255-3263.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I8/3255

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