Fe2+催化H2O2/Na2S2O8氧化降解水中黄腐酸

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刘春1， 褚衍洋1*， 高洋2

（1.青岛科技大学 环境与安全工程学院，山东 青岛266042；2.青岛市环保局黄岛分局，山东 青岛266555）

摘要：利用Fe2⁺催化H₂O₂或Na₂S₂O₈降解水中的黄腐酸，研究了诸因素(处理剂加量、pH和温度)对黄腐酸降解的影响。黄腐酸溶液颜色和TOC的去除，紫外区光吸收强度的降低都表明H2O2/Fe2+体系对黄腐酸具有良好的降解效果；在pH=3.0、H₂O₂为400 mg·L^－1、H₂O₂与Fe²⁺物质的量的比为10∶1的条件下，处理100 mg·L^-1黄腐酸溶液120 min，TOC去除率达到88.4%。Na₂S₂O₈/Fe²⁺降解结果表明：在pH=3.0、Na₂S₂O₈为2 000 mg·L^－1，Fe²⁺为5 mmol·L^-1，温度为50℃条件下处理100 mg·L^-1黄腐酸水样240 min，TOC去除率为55.9%。分析降解效果和试剂成本可知，H₂O₂/Fe²⁺法降解水中黄腐酸优于Na₂S₂O₈/Fe²⁺法。

关键词： H₂O₂；Na₂S₂O₈； 降解；TOC； 黄腐酸

中图分类号：X 382文献标志码：A 

Degradation of Fulvic Acid Solution by H₂O₂/Na₂S₂O₈Oxidation Using Fe²⁺as Catalyst 

LIU Chun1, CHU Yanyang1, GAO Yang2

（1.College of Environment and Safety Engineering, Qingdao University of Science and Technology,Qingdao 266042, China; 2.Qingdao Environmental Protection Bureau of Huangdao, Qingdao 266555, China）

Abstract: The degradation of fulvic acid in water by H₂O₂or Na₂S₂O₈oxidation usingFe2⁺as catalyst was conducted. The effects of several factors such as agent dosage, pH and temperature on the degradation f fulvic acid were investigated. A well degradation was achieved using H₂O₂/Fe2⁺process confirmed by the removal of color and TOC as well as the decrease of absorption peak in ultraviolet light zone. Under the conditions of pH=3.0, 400 mg·L^－1H₂O₂and n（H₂O₂）∶n（Fe2⁺of 10∶1, 88.4% of TOC was removed from 100 mg·L-1 fulvic acid solution by the treatment of 120 min. The results from Na₂S₂O₈/Fe2⁺process showed that under the conditions of pH=3.0, 2 000 mg·L-1 Na₂S₂O₈, 5 mmol·L-1Fe2⁺and 50℃, 55.9% of TOC was removed by the treatment of 240 min. According to degradation performance and reagent cost, it can be concluded that H₂O₂/Fe2⁺process was superior to Na₂S₂O₈/Fe2⁺process for the degradation of fulvic acid.

Key words: hydrogen peroxide; sodium persulfate; degradation; TOC; fulvic acid

收稿日期：2015-11-23

作者简介：刘春(1990—),女,硕士研究生.*通信联系人.

文章编号：16726987（2016）06066005；DOI：10.16351/j.16726987.2016.06.013