共查询到19条相似文献,搜索用时 62 毫秒
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利用碱性缩合法和Fenton试剂氧化并用,对生产脲醛树脂产生的废水进行处理。从试验数据可知,选择硫酸亚铁(g)与过氧化氢水溶液(mL)比例为1:10,可以确保废水中甲醛含量小于1 000 mg/L,COD去除率71.3%,甲醛去除率90%,氨氮去除率79.6%,达到生化处理要求。 相似文献
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Fenton试剂法处理毛皮厂二级出水试验研究 总被引:1,自引:0,他引:1
以经"混凝+生化"处理后的毛皮厂二级废水出水为研究对象,考察了Fenton试剂法处理该出水的影响因素和效果。研究结果表明:采用Fenton试剂法处理毛皮厂二级出水,当pH值为4.0、H2O2和Fe2+使用量分别为1000mg/L和500mg/L、反应时间为50min时,废水化学需氧量(CODCr)、氨氮(NH+4—N)去除率分别达到73.2%和65.3%,处理后的水质可达到《污水综合排放标准》(GB8978-1996)皮革废水一级标准。 相似文献
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超声波/Fenton试剂法联用技术处理染料废水的研究 总被引:1,自引:0,他引:1
通过正交试验确定了超声波条件下Fenton试剂对3种染料废水的最佳处理条件,结果表明:对还原金黄染料废水的最佳处理条件是pH值3,[Fe2 ]=1.5mmol/L,[H2O2]=240mg/L,温度30℃,其色度去除率为98.56%,浊度去除率为99.79%,COD去除率为91.00%;对直接黑染料废水的最佳条件是pH值3,[Fe2 ]=1.5 mmol/L,[H2O2]=300mg/L,温度加℃,其色度去除率为98.41%,浊度去除率为99.42%,COD去除率为89.14%;对还原大紫染料废水的最佳处理条件是pH值5,[Fe2 ]=1.5 mmo/L,[H2O2]=240mg/L,温度40℃,其色度去除率为97.26%,浊度去除率为99.74%,COD去除率为93.07%. 相似文献
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以公司二级生化后的造纸废水为研究对象,首先确定了其Fenton氧化的最佳实验条件和在该实验条件下的Fenton氧化处理效果,然后分别将钛白粉废酸和钢铁废酸用于Fenton氧化,确定其最佳的Fenton氧化条件,最后以不同的混合比将钛白粉废酸和钢铁废酸混合用于Fenton氧化,确定其最佳的混合比。对比不同条件下Fenton氧化的处理效果和处理成本,选择Fenton氧化的最佳工艺条件。 相似文献
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探讨了海泡石经高温处理和酸处理后吸附性能的变化,实验结果表明高温处理和酸处理能很大程度上提高海泡石的吸附性能,并且处理脱墨废水效果明显。 相似文献
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通过吸附实验考察Cu2+初始质量浓度、溶液pH、时间等因素对罗非鱼鱼鳞吸附水中Cu2+性能的影响;通过FTIR、BET、SEM、吸附动力学和吸附等温线分析吸附机理。结果表明:当溶液pH为5、温度为25℃、吸附剂用量为3 g/L、吸附时间为3 h、Cu2+初始质量浓度为100 mg/L时吸附效果最好,Cu2+的吸附率可达79.82%,吸附量可达26.63 mg/g;鱼鳞对Cu2+的吸附过程符合准二级动力学模型,为化学吸附;吸附等温线符合Langmuir吸附等温式。 相似文献
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Fenton reaction is a highly effective treatment for degrading phenolic compounds in an aqueous solution. However, during phenol oxidation, the oxidized water takes on a dark brown color associated with increased toxicity. Then, although phenol can be completely removed, if the oxidation process is not carried out properly, the final wastewater will be brown in color and have higher toxicity, two parameters in which legislation imposes restrictions. This paper analyzes the development of the dark color observed in the solution under oxidation treatment and formulates a reaction mechanism to explain the color generation. The experiments were carried out following the batch-wise procedure, but with the solution pH being kept constant throughout the reaction at its optimum value for phenol removal, i.e., pH 3.0. It is checked experimentally that color is formed at the beginning of the reaction in less than five minutes, and follows the kinetic-path of a reaction intermediate. During the first steps of the reaction phenol is degraded to dihydroxylated rings (catechol, resorcinol, and hydroquinone). These aromatic intermediates generate higher colored compounds such as ortho- and parabenzoquinone. On the other hand the dihydroxylated rings can react with their own quinones to generate charge-transfer complexes (quinhydrone), compounds which take on a dark color at low concentrations. Moreover, when iron reacts with hydrogen peroxide, ferric ions are generated that can be coordinated to benzene rings to produce colored metal complexes. The observed color of the solution is not a fortuitous result depending on trace components of low significance, but depends directly on the main reaction intermediates, so it is concluded that observed color depends on the level of oxidation reached. The maximum color observable during oxidation treatment (A(o)) depends only on initial phenol concentration and not on oxidant or catalyst doses. 相似文献