钨酸钠-双氧水体系催化氧化降解亚甲基蓝.pdf

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2011年第30卷第4期
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
研究开发
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钨酸钠-双氧水体系催化氧化降解亚甲基蓝
高立新,张大全,顾茸义
(上海电力学院能源与环境工程学院,上海20000
摘要:研究了钨酸钠-双氧水体系对亚甲基蓝模拟印染废水的催化氧化降解效果。结果表明,当0.01molL的
钨酸钠溶液的加入量为7.0mL、30%的双氧水溶液的加入量为3.5mL、反应温度60℃、反应40min后,对100
mL浓度为10mgL的亚甲基蓝模叔废水的脱色牵接近100%,反应在较宽的pH值范围(1~14),都有较好的去
除效果。紫外可见光语分析表明,原水样在664nm、614nm和292mm、244nm处的特征吸收波峰消失了,降
解为小分子物质。在此条件下的亚甲基蓝降解速率常数为00879min,活化能较低,为34461 k/mol,反应符
合一级反应动力学模型
关键词:钨酸钠;催化氧化;亚甲基蓝
中图分类号:X703;TQO35;X031.7文献标志码:A文章编号:1000-613(2011)04-0895-06
Degradation of methylene blue by catalytic oxidation
in Na2 WO4-H2O2 system
GAO Lixin, ZHANG Daquan, GU Rongyi
School of Thermal Power and Environmental Engineering, Shanghai University of Electric Power
Shanghai 200090, China)
Abstract: The degradation of methylene blue by catalytic oxidation in Na2 WO4-H2O2 system was
discussed The results showed that the degradation rate of methylene blue was near 100% after 40 min
of reaction in Na2 WO4-H2O2 system. The optimum conditions for 100ml methylene blue(10 m/L)
degradation were as follows: reaction temperature 60 C, sodium tungstate(0. 01 mol/L)dosage 7.0
ML, 30% H202 solution dosage 3.5ml. The degradation of methylene blue was effective in a wide
range of PH value (1-14 ) The Uv-vis spectroscopic analyses found that the characteristic absorption
peaks originally in 664 nm, 614 nm and 292 nm, 244 nm disappeared, indicating that hazardous organic
compounds were transformed into small molecules. Under these conditions, reaction rate constant for
methylene blue degradation was 0.0879 min activation energy was 34.61 kj/mol. The degradation of
methylene blue in NA2WO4-H2O2 system accorded well with the first-order kinetics model
Key words: sodium tungstate; catalytic oxidation; methylene blue
高难度废水一般是指在工业生产过程中所产
化学氧化常用于生物处理的前处理,一般是在
生:的难以生化降解的废水,如印染废水、制革废水、催化剂的作用下,用化学氧化剂处理有机废水以提
造纸废水、电镀废水等。其中常含有一些有毒物质,高废水可生化性,或直接氧化降解废水中有机物使
使微生物不能存活,故常规生物方法难以降解处理。
相关资料显示?,高难度废水处理技术的关键与核收稿日期:201082修改稿日期:201010
心是废水中难降解可溶性物质的去除,即如何将不
基金项目:上海市科委能力建设项目(08160512600)
第一作者及联系人:高立新(1967ー),女,硕士,副教授,研究方
可生化的可溶性化学物质转化为可生化的物质。
向为水处理药剂、环境材料。E-mailganlixin@shiep.edu.cn