改性活性炭对内分泌干扰物的吸附效能与机制

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Abstract

In this paper, activated carbon (AC) was modified by immersing it in different solutions, including mixed acid solutions, ammonia solutions, KMnO₄ solutions and surfactant solutions, to improve its adsorption efficiency of endocrine disrupting compounds. Changes in the surface chemistry and the porous structure were assessed by specific surface area and porosity analyser, SEM, FT-IR, and Boehm titration. The best modification method of activated carbon was determined by static adsorption experiments, and the adsorption mechanism of modified activated carbon was discussed. The results showed that KMnO₄ modified activated carbon (AC-K) had the best contaminant adsorption performance. The removal rates of DBP, Atrazine and SMZ by AC-K were 94.5%, 93.8% and 95.5%, respectively, and the adsorption process was in accordance with second-order kinetic equation and D-R model. From the calculated results of these models, we found that the adsorption rates of AC-K on the target pollutants were significantly accelerated, and the secondary adsorption rate constant of Atrazine was 1.75 times than that of AC. The theoretical saturated adsorption capacity of DBP, Atrazine and SMZ by AC-K were improved by 42.2%, 629% and 122%, respectively, compared with those before modification. The adsorption mechanism of activated carbon was transformed from physical adsorption into ion exchange adsorption, after modified by KMnO_4.

Key words： modified activated carbon atrazine sulfamethoxazole dibutyl phthalate

Received: 11 November 2019

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X592

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	Articles by authors
	LIU Fan
	WANG Guang-zhi
	ZHAO Qian
	ZHANG Cheng
	WANG Kun
	CHEN Zhi-qiang

Cite this article:

LIU Fan,WANG Guang-zhi,ZHAO Qian等. Adsorption efficiency and mechanism of endocrine disrupting compounds by modified activated carbon[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2473-2482.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I6/2473

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