硫酸根自由基对活性炭吸附刚果红的影响

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Abstract

The feasibility of activated carbon regeneration by sulfate radical (SO₄^-·) activation was explored by studying the effect of SO₄^·- on the adsorption performance of activated carbon on Congo red. The results confirmed that when the concentration of Congo red solution was 100mg/L and the amount of activated carbon was 1.25g/L, the Congo red adsorption efficiency by activated carbon was 62mg/g. The pH value of the solution and KH₂PO₄ and K₂HPO₄ dissolved in the solution have little effect of the adsorption of Congo red by activated carbon. Compared with Congo red removed by activated carbon alone, the removal efficiency of Congo red merely increased by 5% when the persulfate sodium added into systems with the amount of sodium pecould rsulfate was 12 times of Congo red concentration. However, the removal efficiency of persulfate sodium to Congo red could reach 94%~99% at 30~120min at 70℃ under the heating condition in water bath. The removal efficiency of Congo red in the same corresponding time period was 91%~94% when the Congo red removed by the combined action of activated carbon and persulfate sodium under 70℃. However, the removal efficiency of Congo red in the same corresponding time period was 86%~90% when the Congo red removed by the combined action of activated carbon and Ultraviolet rays (UV) under 70℃. It coudl be seen that SO₄^-·have little effect on the adsorption performance of activated carbon. Therefore, it is not feasible to regenerate activated carbon via the advanced oxidation technology of SO₄^·-.

Key words： Congo red activated carbon sulfate radical

Received: 03 June 2019

PACS:

X703

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	Articles by authors
	BI Wen-long
	HAO Xi-hua
	LIU Fen-wu
	ZHANG Jian
	QIN Jun-mei
	NI Yue

Cite this article:

BI Wen-long,HAO Xi-hua,LIU Fen-wu等. Effect of sulfate radical on adsorption of Congo red by activated carbon[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 190-197.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/190

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