钙离子浓度响应下的微细气泡强化混凝机制

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摘要为进一步补充微细气泡共混凝工艺强化混凝效能机制及该工艺的工程应用潜力,本文探究了钙离子(Ca²⁺)浓度响应对微细气泡共混凝工艺强化去除腐殖酸(HA)的影响.研究结果表明,不同钙离子浓度响应下的微细气泡可以强化HA的去除效果,但不同循环时间下强化效果有所不同.当微细气泡循环时间恒定为1min时,混凝过程中微细气泡的参与可以通过强制聚合氯化铝(PACl)水解,提升溶液电位至等电点位以及促进HA与Ca²⁺之间的络合作用来强化HA的去除效能,且HA的去除效能随着Ca²⁺浓度升高而升高,最高可相较于没有微细气泡存在时的常规混凝工艺提升约42%.此外,随着微细气泡循环时间的延长,溶液Zeta电位逐渐提升,影响了HA的强化去除效能.上述研究结论为微细气泡强化混凝工艺应用于工程实践提供了数据支持与理论支撑.

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	李春波
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	赵子昂
	张志强
	卢金锁

关键词 ：微细气泡, 混凝效能, 铝形态, 络合作用, 饮用水处理

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

收稿日期: 2024-08-29

PACS:

X52

基金资助:国家自然科学基金资助项目(52470014)

作者简介: 李春波(2000-),男,河南登封人,西安建筑科技大学环境与市政工程学院硕士研究生,研究方向为饮用水品质提升与水质保障.lcbyjya@163.com.

引用本文:

李春波, 黄晓江, 李萍, 赵子昂, 张志强, 卢金锁. 钙离子浓度响应下的微细气泡强化混凝机制[J]. 中国环境科学, 2025, 45(3): 1290-1297. LI Chun-bo, HUANG Xiao-jiang, LI Ping, ZHAO Zi-ang, ZHANG Zhi-qiang, LU Jin-suo. Enhanced coagulation mechanism of fine bubbles in response to calcium ion concentration. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(3): 1290-1297.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2025/V45/I3/1290

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