[1]冯树兴,孙明亮,罗从伟,等.UV222/H2O2预氧化强化PAC混凝除藻效能及机理[J].中国给水排水,2025,41(3):35-42.
　FENGShu-xing,SUN Ming-liang,LUOCong-wei,et al.UV222/H2O2 Pre-oxidation Enhanced PAC Coagulation for Algae Removal: Performance and Mechanism[J].China Water & Wastewater,2025,41(3):35-42.
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UV222/H2O2预氧化强化PAC混凝除藻效能及机理

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第3期 页码: 35-42 栏目: 出版日期: 2025-02-01
Title:
UV222/H2O2 Pre-oxidation Enhanced PAC Coagulation for Algae Removal: Performance and Mechanism
作者:
冯树兴1， 孙明亮2， 罗从伟1， 王金晓1， 孙宇1， 许瑞頔1， 武玮1， 王洪香1， 秦玢1
（1.山东建筑大学市政与环境工程学院 资源与环境创新研究院，山东 济南 250101；2.山东省交通规划设计院集团有限公司，山东 济南 250101）
Author(s):
FENG　Shu-xing1， SUN Ming-liang2， LUO　Cong-wei1， WANG　Jin-xiao1， SUN　Yu1， XU　Rui-di1， WU　Wei1， WANG　Hong-xiang1， QIN　Bin1
（1. Resources and Environment Innovation Institute， School of Municipal and Environmental Engineering， Shandong Jianzhu University， Jinan 250101， China； 2. Shandong Provincial Communications Planning and Design Institute Group Co. Ltd.， Jinan 250101， China）
关键词:
UV222;  过氧化氢;  聚合氯化铝;  混凝;  藻类
Keywords:
UV222;  H2O2;  polyaluminum chloride (PAC);  coagulation;  algae
摘要:
对比研究了UV222/H2O2、UV254/H2O2预氧化体系强化混凝除藻的效能。结果表明，在H2O2投量为0.3 mmol/L、聚合氯化铝（PAC）投加量为0.8 mg/L、UV辐射剂量为1 300 mJ/cm2、UV222/UV254辐照时间为30 min/15 min的条件下，UV222/H2O2、UV254/H2O2预氧化强化混凝系统对藻细胞的去除率分别高达80%和87.5%，相较PAC单独处理分别提高了55%和62.5%；沉降后胞外有机物中具有芳香结构的蛋白质和可溶性微生物代谢产物显著减少。机理研究表明，UV222/H2O2、UV254/H2O2预氧化会产生大量的羟基自由基，氧化藻细胞表面的有机物，使Zeta电位升高，从而提高混凝除藻效能。此外，倒置荧光及扫描电镜分析结果显示，UV254/H2O2预氧化相较UV222/H2O2预氧化对藻细胞的破坏性更强，UV222/H2O2预氧化是一种更温和的强化混凝除藻方式，且无二次污染。
Abstract:
The performance of UV222/H2O2 and UV254/H2O2 pre-oxidation systems on enhanced coagulation for algae removal were compared. Under the conditions of H2O2 dosage of 0.3 mmol/L, polyaluminum chloride (PAC) dosage of 0.8 mg/L, UV irradiation dose of 1 300 mJ/cm2, and UV222/UV254 irradiation time of 30 min/15 min, the removal efficiencies of algal cells by the UV222/H2O2 and UV254/H2O2 pre-oxidation enhanced coagulation systems were 80% and 87.5%, respectively. These values represented improvements of 55% and 62.5% over the removal efficiency achieved with PAC alone. Following the completion of the sedimentation process, there was a significant reduction in aromatic proteins and soluble microbial products within the extracellular organic matter. The mechanism study revealed that the pre-oxidation processes using UV222/H2O2 and UV254/H2O2 generated a significant amount of hydroxyl radicals. These radicals oxidized organic matters on the surface of algal cells, leading to an increase in Zeta potential, thereby enhancing the efficiency of coagulation for algae removal. Furthermore, the results from inverted fluorescence and scanning electron microscopy analysis demonstrated that UV254/H2O2 pre-oxidation exhibited greater destruction towards algal cells compared to UV222/H2O2 pre-oxidation. The latter method was found to be a gentler approach for enhanced coagulation for algae removal, effectively preventing secondary pollution.
更新日期/Last Update: 2025-02-01