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Indexed by:期刊论文
Date of Publication:2014-01-01
Journal:水处理技术
Included Journals:PKU、ISTIC、CSCD
Volume:40
Issue:9
Page Number:62-65
Key Words:壳聚糖; 碳纳米管; 石墨电极; 电Fenton; 4-硝基酚
Abstract:采用硫酸亚铁溶液浸渍经壳聚糖(CHI)修饰的多壁碳纳米管(MWNTs)制备Fe/CHI-MWNTs粉末,并与石墨粉、聚四氟乙烯以一定比例混合制成
Fe/CHI-MWNTs修饰石墨电极,用作电Fenton体系的阴极氧化降解4-硝基酚,探讨了浸渍FeSO_4溶液的含量、反应初始pH、电流密度对
电Fenton降解4-硝基酚的影响,同时考察了电极的稳定性。结果表明,用质量浓度10.0
g/L的FeSO_4溶液浸渍制得的Fe/CHI-MWNTs修饰石墨电极,在4-硝基酚初始质量浓度为100
mg/L、初始pH为3.0、电流密度为3.0 mA/cm~2、电解质Na_2SO_4浓度为0.05 mol/L、空气曝气体积流量为0.1
m~3/h的条件下,60 min时4-硝基酚的去除率达89.98%;在该体系下,90 min阴极产生的H_2O_2可达148
mumol/L,Fe~(3+)质量浓度为1.52 mg/L;电极可重复使用,连续使用810 min后电极的催化活性才逐渐降低。
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