真空紫外/过硫酸盐工艺去除藻类有机物的效能与机理

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中图分类号：X524 文献标志码：A 文章编号：2096-6717（2025）04-0197-11

Efficiency and mechanism of ultraviolet/persulfate process for algal organic matter removal

CUI Fuyi，YAO Yingyun，LI Li， ZHAO Zhiwei （College of Environment and Ecology，Chongqing University， Chongqing 4Oo045，P.R. China）

Abstract： Algal blooms in drinking water sources produce a large amount of algal organic matter （AOM），and AOM can react with chlorine to produce disinfection by-products （DBPs），significantly endangering the water quality.Thus，the vacuum ultraviolet/persulfate （VUV/PS） process was employed to remove AOM and reduce the disinfection by-products （DBPs） formation. The VUV/PS process demonstrated superior effciency in AOM removal compared to UV/PS，VUV，UV，and PS processes，achieving removal rates of dissolved organic carbon （DOC）and UV254 of 74.7% and 70.7% ，respectively. Additionally，the removal rate of fluorescent organic matter surpasses 82.2% .PS dose andinitial pH impacted AOM removal by influencing the transformation and concentration of reactive oxygen species （ROS）. The primary ROS in the VUV/PS process were hydroxyl radicals （HO*） and sulfate radicals （SO4∙- ），with steady-state concentrations of 4.78×10-13 and

1.51×10-11mol/L ，respectively. AOM was effectively eliminated by VUV photolysis and ROS oxidation， with VUV enhancing the eficiency of AOM removal by facilitating the generation and conversion of ROS. Additionally， during subsequent chlorination，the VUV/PS process significantly reduced the yield of DBPs and theoretical toxicity.In conclusion，the VUV/PS process exhibited significant potential forapplication in treating AOM-rich water.

Keywords： algal organic matter; vacuum ultraviolet; persulfate; hydroxyl radical; sulfate radical; disinfection by-products

当地表水体（如湖泊、水库）出现富营养化现象时，藻类会过度繁殖并产生大量的溶解性藻类有机物（AOM）[]。（剩余20682字）