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利用MW/H2O2高级氧化技术处理水中微量硝基苯(NB),研究了该工艺对硝基苯的去除效果,分析了微波功率、H2O2投加量、硝基苯初始质量浓度、水中普遍存在的腐植酸和碳酸氢根对MW/H2O2工艺降解硝基苯的影响。结果表明,MW/H2O2工艺在处理2 L初始质量浓度为300μg.L-1的硝基苯时效果显著,32 min后NB去除率就达88.5%,远高于单独H2O2氧化或单独的微波辐射。试验中该工艺最佳微波功率为300 W,随H2O2投加量和NB初始质量浓度的增加,MW/H2O2对NB的去除率先增后减,但单位H2O2降解NB的量始终随着NB初始质量浓度的增加而增大。腐植酸对MW/H2O2氧化降解硝基苯有显著的抑制作用,但HCO3-却对硝基苯的氧化降解有一定的促进作用。
The treatment of nitrobenzene (NB) in water by MW / H2O2 advanced oxidation technology was studied. The removal of nitrobenzene by this process was studied. The effects of microwave power, H2O2 dosage, initial nitrobenzene concentration, Effect of humic acid and bicarbonate on degradation of nitrobenzene by MW / H2O2 process. The results showed that MW / H2O2 had a significant effect on the treatment of nitrobenzene with an initial concentration of 300μg.L-1 at 2 L, and the removal efficiency of NB reached 88.5% after 32 min, much higher than that of H2O2 alone or microwave radiation alone . The optimum microwave power was 300 W. With the increase of H2O2 dosage and NB initial mass concentration, the removal rate of NB by MW / H2O2 firstly increased and then decreased, but the amount of NB degraded by unit H2O2 always changed with the NB initial mass Increase in concentration increases. Humic acid had a significant inhibitory effect on the oxidative degradation of nitrobenzene by MW / H2O2, but HCO3- promoted the oxidative degradation of nitrobenzene to a certain extent.