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含能材料  2014 

不同臭氧组合工艺处理含硝基苯类化合物废水的实验研究

DOI: 10.3969/j.issn.1006-9941.2014.05.024

Keywords: 环境化学,硝基苯类化合物,超重力,臭氧,双氧水,动力学

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Abstract:

为研究臭氧高级氧化技术对含硝基苯类化合物炸药废水的处理效果,采用四种不同组合工艺(旋转填料床(RPB)-O3/H2O2、RPB-O3、曝气反应装置(BR)-O3/H2O2和BR-O3),进行了模拟废水中硝基苯类化合物降解的对比性试验。结果表明,O3/H2O2工艺对硝基苯类化合物表现出较强的降解性能,去除率可达99%,出水指标达到《污水综合排放标准》(GB8978-1996)中硝基苯类化合物排放标准。在相同反应时间下,BR-O3/H2O2和BR-O3工艺对硝基苯类化合物去除率明显偏低。在RPB-O3/H2O2和RPB-O3工艺中,硝基苯类化合物去除率随超重力因子和初始pH值的增加而增大,而随双氧水浓度和液体流量的增加呈先增大后降低的变化趋势。在臭氧浓度为50mg·L-1,超重力因子为80,初始pH为10.5,双氧水浓度4.9mmol·L-1和液体流量120L·h-1的试验条件下,硝基苯类化合物去除效果较好。此条件下硝基苯类化合物的降解过程符合假一级反应动力学。

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