磁性浮珠VMB@Fe<sub>3</sub>O<sub>4</sub>@CS对鱼腥藻和微囊藻的去除

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摘要为了有效处理有害藻华,并避免化学物质二次污染,结合磁絮凝与浮珠浮选方法,以玻化微珠、Fe₃O₄、壳聚糖为原料合成磁浮珠VMB@Fe₃O₄@CS,对水华鱼腥藻和铜绿微囊藻进行去除实验.结果表明,磁浮珠对2种水华藻的最佳去除效率分别达到99.01%(0.12g/L)、98.6%(0.21g/L).VMB@Fe₃O₄@CS在较宽的pH值范围(4~10)和水温范围(5℃~35℃)内实现较高的去除率(>60%),离子强度的增加对微藻的去除起负面影响.通过形态学观察、表面疏水率及Zeta电位分析确定静电吸引、吸附架桥是磁浮珠对藻细胞主要的絮凝机理.制备的VMB@Fe₃O₄@CS去除有害藻华具有很大应用潜力.

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	车文露
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	张高山
	李彦鹏

关键词 ：有害藻华, 磁性浮珠浮选, 絮凝

Abstract：In order to effectively treat harmful algal blooms and avoid secondary pollution by chemical substances, maglev beads VMB@Fe₃O₄@CS were synthesized through a novel method combined with magnetic flocculation and float flotation which use vitrified microbeads, Fe₃O₄ and chitosan as raw materials, to remove Anabaena flos-aquae and Microcystis aeruginosa. The results showed that the optimal removal efficiencies of the two species of algae were 99.01% (0.12g/L) and 98.6% (0.21g/L), respectively. VMB@Fe₃O₄@CS achieved a high removal rate (> 60%) in a wide pH range (4~10) and water temperature range (5~35°C), and the increase of ionic strength had a negative effect on the removal of microalgae. Through morphological observation, surface hydrophobicity and Zeta potential analysis, it was determined that electrostatic attraction and adsorption bridging were the main flocculation mechanisms of maglev beads on algal cells. The experimental results show that the prepared VMB@Fe₃O₄@CS has a great potential to control harmful algal blooms.

Key words： harmful algal blooms magnetic buoyant-bead flotation flocculation

收稿日期: 2023-07-24

PACS:

X524

基金资助:陕西省自然科学基金资助项目(2020JM-236)

作者简介: 车文露(1999-),女,山西运城人,长安大学硕士研究生,主要研究方向为微藻水处理及生物质能开发.发表1篇论文.chewenlu@chd.edu.cn.

引用本文:

车文露, 赵岩, 张高山, 李彦鹏. 磁性浮珠VMB@Fe₃O₄@CS对鱼腥藻和微囊藻的去除[J]. 中国环境科学, 2024, 44(3): 1526-1533. CHE Wen-lu, ZHAO Yan, ZHANG Gao-shan, LI Yan-peng. Effect and mechanism of magnetic floatable bead VMB@Fe₃O₄@CS on removing Anabaena and Microcystis. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1526-1533.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I3/1526

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