Cu<sup>2+</sup>共存对磺胺嘧啶在土壤中吸附的影响

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Abstract Copper (Cu) and Sulfadiazine (SDZ) were selected as target pollutants as their high detection rate in soil environment. The batch sorption methods were used to investigate effects of pH, ion concentration, organic matter content and particle size on SDZ adsorption to soil with Cu²⁺ co-existing. The adsorption mechanism of SDZ in soil was characterized by FT-IR analysis. Co-existence of Cu²⁺ significantly increased the adsorption amount of SDZ on soil even with different pH conditions. Both Cu²⁺ and Ca²⁺ could promote SDZ adsorption to soil particles by complexation and ion-bridge. The effect of organic matter on adsorption of SDZ on soil was greatly related to concentrations of the co-existing Cu²⁺. The adsorption of SDZ to soil clay was little influenced by the co-existing Cu²⁺. FT-IR analysis showed that the physical adsorption was the main mechanism of SDZ adsorption to soil, which was also accompanied by hydrogen bonding interactions, complexation and π-π conjugation. Cu²⁺ can significantly increase the retention capacity of SDZ in soil and reduce its risk of environmental migration.

Key words： sulfadiazine soil copper adsorption influencing factors

Received: 30 October 2020

PACS:

X131.3

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	Articles by authors
	XU Zi-wen
	DONG Meng-yang
	LIU Xi-juan
	SHAO Yi-fei
	LV Shi-quan
	HU Shu-xiang
	XU Yu-zhi
	HU Xin-xin
	LIU Ai-ju

Cite this article:

XU Zi-wen,DONG Meng-yang,LIU Xi-juan等. Effect of Cu²⁺coexistence on adsorption of sulfadiazine in soil[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2773-2779.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I6/2773

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