【摘要】 采用高效节能的Fenton和光-Fenton技术对二次纤维制浆废水的处理进行了对比研究。结果表明,Fenton和光-Fenton技术处理该废水非常有效,在最佳实验条件下(Feton试剂最佳物质的量比为10∶1、H2O2用量1678.75 mg/L、温度为30℃、Fenton和光-Fenton反应体系的最佳pH值分别为2.8和3.0),经过90 min的反应,可使二次纤维制浆废水的最大吸光度降低约92%和99%,并可去除87%和95%的CODCr。减小Fenton试剂比可加快有机物的降解速率;增加H2O2用量可以增加有机物的降解程度;根据废水CODCr值计算得到的H2O2理论投加量可以满足降解废水中有机物的需求;光照可提高最佳pH值,显著提高较高pH值体系的有机物降解速率和废水处理效果;光源和光照强度不同,有机物的降解程度不同。更多还原

【Abstract】 Pulp and papermaking effluents contain a lot of harmful,toxic and persistent organic pollutants which are very difficult to be degraded by conventional wastewater treatment processes,so in this paper efficient and economical Fenton and photo-Fenton technologies were used to degrade these organic contaminants of wastepaper based pulping effluent.From this study,the Fenton and photo-Fenton technologies were proved to be highly effective for the treatment of such wastewater,and the optimal conditions are the following:[H₂O₂]:=10∶1,[H₂O₂]is theoretical demand,pH=2.8 and 3.0 respectively for Fenton and photo-Fenton reaction,t=30℃.Up to 98% maximum light absorbance and 95% COD_Cr can be decreased after 90 min in photo-Fenton reaction,while 92% and 87% in Fenton reaction.From this study,it was found that irradiation can result in an increase of optimum pH,degradation rate and treatment efficiency;decreasing the Fenton reagent ratio can lead to larger A₂₉₀ decrease; the H₂O₂ dose controls the overall efficiency of A₂₉₀ decrease while the theoretical demand of H₂O₂ is enough to ensure the A₂₉₀ decrease;the treatment efficiency will be different when different light sources and（or） intensity of radiation are used.更多还原