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铁基MOF材料对高藻水超滤过程中膜污染的影响

作者：瞿芳术，韦光梅，邓良，叶林雄，荣宏伟，余华荣，杨枝盟

单位：广州大学土木工程学院，广州510006

关键词：铁基金属有机骨架材料；高藻水；超滤；膜污染

DOI号：

分类号： X524

出版年,卷(期):页码： 2022,42(3):135-144

摘要：

超滤技术可以完全除藻，但是膜污染仍是限制超滤技术发展的核心问题。本文拟采用铁基金属有机骨架材料（Metal-Organic Frameworks, MOFs）预处理控制藻类膜污染，考察了MIL-88A吸附以及MIL-88A活化过硫酸盐（Persulfate, PS）对高藻水超滤过程中膜污染的影响。研究结果表明： MIL-88A预处理对超滤过程中膜通量下降具有明显的缓解作用，MIL-88A投加量由0mg/L增加至25mg/L时，末端比通量由0.17增加至0.46； MIL-88A预处理对不可逆膜污染的减缓效力约为50%，而随着MIL-88A浓度的增加，缓解不可逆污染的效力并未增强；MIL-88A预处理可以有效提高超滤处理高藻水过程中荧光组分的去除。此外，MIL-88A可以有效活化过硫酸盐，但无法有效控制高藻水超滤过程中的膜污染。

Ultrafiltration (UF) technology can completely remove algae, but membrane fouling is still the core problem restricting the development of UF technology. In this paper, iron-based metal organic frameworks (MOFs) were used to control algae membrane fouling. The effects of MIL-88A adsorption and MIL-88A activated persulfate on membrane fouling during the algae-laden water treatment by ultrafiltration were investigated. The results showed that the pretreatment of MIL-88A could significantly alleviate the decline of membrane flux during ultrafiltration. When the dosage of MIL-88A increased from 0mg/L to 25mg/L, the terminal specific flux increased from 0.17 to 0.46; Meanwhile, the mitigation effect of MIL-88A pretreatment on irreversible membrane fouling was about 50%, but the mitigation effect did not increase with the increase of MIL-88A concentration; MIL-88A pre-treatment can effectively improve the removal of fluorescent components during the treatment of algae-laden water by ultrafiltration. Moreover, MIL-88A can effectively activate persulfate, but it can not effectively control membrane fouling during the treatment of algae-laden water by ultrafiltration.

基金项目：

国家自然科学基金资助项目（51878211）；广东省自然科学基金(2019A1515012232)。

作者简介：

瞿芳术（1984.09），男，副教授，籍贯：福建省宁德市，研究方向：主要从事膜法水处理技术研究

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