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Fe2+催化H2O2/Na2S2O8氧化降解水中黄腐酸

作者:时间:2016-11-26点击数:

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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·L1H2O2and 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

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