In this work, UV and UV/chlorine (UV/Cl) were employed to enhance powdered activated carbon (PAC) adsorption pretreatment prior to ultrafiltration process for algae-contaminated surface water treatment. Their performance on membrane fouling mitigation and organic pollutant rejection was systematically evaluated. A comparative experiment was conducted under varying pollution degrees of algal extracellular organic matter (EOM) contamination in surface river water. The results indicated that UV/PAC and UV/Cl/PAC pretreatment effectively enhanced the removal of dissolved organic carbon (DOC) and UV-absorbing at 254 nm (UV₂₅₄). The characteristics of feed water after pretreatments were investigated through apparent molecular-weight (MW) distribution and fluorescence parallel factor analysis (PARAFAC). In regard to membrane fouling mitigation, UV/Cl/PAC noticeably decreased reversible and irreversible fouling resistance simultaneously and UV/PAC preferred reducing reversible membrane fouling. Combined fouling modeling was operated to scrutinize the fouling mitigation mechanisms and standard pore blocking was proved to be dominant during the filtration process. Moreover, the UV/Cl and UV/Cl/PAC pretreatments were proved positive for emerging micropollutants degradation and disinfection by-products formation potential reduction. The results suggested that UV and UV/Cl are likely strategies to enhance the efficiency of PAC adsorption pretreatments prior to ultrafiltration during algae-contaminated water treatment.

在这项工作中，在对藻类污染的地表水进行超滤处理之前，先采用UV和UV /氯（UV / Cl）增强粉末状活性炭（PAC）的吸附预处理。系统地评估了它们在减轻膜污染和去除有机污染物方面的性能。在地表河水中藻类细胞外有机物（EOM）污染的变化程度不同的情况下进行了对比实验。结果表明，UV / PAC和UV / Cl / PAC预处理有效地提高了溶解有机碳（DOC）的去除和在254 nm（UV ₂₅₄）。通过表观分子量（MW）分布和荧光平行因子分析（PARAFAC）研究了预处理后的给水特性。关于减轻膜结垢，UV / Cl / PAC同时显着降低了可逆和不可逆结垢性，而UV / PAC优选减少了可逆膜结垢。结合使用了污垢模型，以研究污垢的缓解机理，并证明在过滤过程中标准的孔阻塞是主要的。此外，UV / Cl和UV / Cl / PAC预处理被证明对新兴的微污染物降解和消毒副产物形成潜力的降低是有利的。