钙离子浓度响应下的微细气泡强化混凝机制

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Abstract In order to further supplement the mechanism of the enhanced coagulation efficiency of the fine bubble co-coagulation process and the potential of the process for engineering applications, this paper investigated the effect of calcium ion concentration response on the enhanced removal of humic acid (HA) by the fine bubble co-coagulation process. The results showed that the fine bubbles could enhance the removal of HA with different calcium ion concentration responses, but the enhancement effect was different with different circulation times. When the cycle time of fine bubbles was kept constant at 1min, the participation of fine bubbles in the coagulation process could enhance the removal efficiency of HA by forcing the hydrolysis of polyaluminum chloride (PACl), elevating the potential of the solution to the isoelectric potential, and promoting the complexation between HA and Ca²⁺, and the removal efficiency of HA increased with the increase of Ca²⁺ concentration, and the removal efficiency of HA increased about 42% with the increase of Ca²⁺ concentration, and increased about 42% with the increase of Ca²⁺concentration, and increased about 42% with the increase of Ca²⁺ concentration. The HA removal efficiency increased with increasing Ca²⁺ concentration, up to about 42% compared to the conventional coagulation process without the presence of fine bubbles. In addition, with the extension of the fine bubbles circulation time, the Zeta potential of the solution gradually increased, which affected the enhanced removal efficiency of HA. The above findings provide data and theoretical support for the application of the fine bubble co-coagulation process in engineering practice.

Key words： fine bubbles coagulation efficiency aluminum species complex interaction drinking water treatment

Received: 29 August 2024

PACS:

X52

Corresponding Authors: 卢金锁,教授,lujinsuo@xauat.edu.cn E-mail: lujinsuo@xauat.edu.cn

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	Articles by authors
	LI Chun-bo
	HUANG Xiao-jiang
	LI Ping
	ZHAO Zi-ang
	ZHANG Zhi-qiang
	LU Jin-suo

Cite this article:

LI Chun-bo,HUANG Xiao-jiang,LI Ping等. Enhanced coagulation mechanism of fine bubbles in response to calcium ion concentration[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(3): 1290-1297.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I3/1290

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