共查询到16条相似文献,搜索用时 187 毫秒
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对O3/H2O2氧化页岩气产出水降解有机物动力学、特征污染物苯胺降解动力学及机理进行实验分析,研究结果表明:页岩气产出水有机物、苯胺降解符合一级反应动力学;臭氧分子的分解符合零级反应动力学。通过液相色谱-质谱(LC-MS)分析O3/H2O2氧化苯胺降解过程中间产物,发现O3/H2O2氧化法不能完全 将页岩气产出水矿化为二氧化碳和水,只是将复杂有机物分子转化为结构简单的直链烷烃或者羧酸类物质,需与其他氧化方式相结合才可将有机物完全去除,并提出了降解返排液中苯胺的两条可能途径,为O3/H2O2氧化工艺实际应用提供理论依据。 相似文献
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O3/H2O2艺去除饮用水中2-MIB的效能与机制 总被引:1,自引:0,他引:1
以2-甲基异莰醇(MIB)为嗅味物质的代表物,采用过氧化氢/臭氧氧化(O3/H2O2)工艺去除水中嗅味物质,考察了O3/H2O2工艺对水中2一MIB的去除效能与主导作用机制。研究表明,投加H2O2显著提高了单独0,氧化对2-MIB的去除效能,H2O2与O3最佳物质的量比为0.3:1,且2-MIB去除效果随pH值的升高而升高。叔丁醇对2-MIB的去除表现出显著的抑制作用,在O3氧化2-MIB过程中,除O3分子氧化2-MIB外,O3在水中自分解产生的强氧化性的羟基自由基(HO·)也具有协同氧化作用。不同浓度的天然有机物(NOM)对2-MIB去除效果的影响不同,较低浓度的NOM促进了2-MIB的去除,但随着其浓度的升高,2-MIB去除率明显降低。O3/H2O2工艺对水中2-MIB表现出良好的去除效果,是强化去除水中2-MIB等致臭微量有机物的重要工艺。 相似文献
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以环氧丙烷废水为研究对象初步研究了H2O2预氧化作为化学强化预处理的最佳试验条件以及预氧化+生物接触氧化工艺处理的效果。结果表明,用H2O2预处理环氧丙烷废水取得了良好效果。经预处理后,COD总去除率可达到92%,提高了废水的可生化性。 相似文献
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进行了水力空化单独作用和水力空化与H2O2联用降解相同浓度二甲苯废水的对比试验,结果表明:H2O2对水力空化具有强化作用,加入10ml 25mg/l的H2O2,可使含5.0mg/l二甲苯废水溶液的降解率在120min时达到51.42%。 相似文献
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采用UV/H2O2/微曝气、UV/H2O2、UV/微曝气、H2O2/微曝气四种工艺处理受苯胺污染的水源水.试验结果表明,采用UV/H2O2/微曝气工艺,H2O2投加量分别为1,2,5,10和20 mL,对苯胺均有理想的去除效果.随着投加量的增加,苯胺的去除率并没有明显的提高,反应30 min后去除率分别达到94.3%,96.4%,96.5%,97.3%和96.8%.原水苯胺为0.90 mg/L时,投加1 mL H2O2反应30 min后,出水苯胺为0.06 mg/L,满足标准要求.UV/H2O2/微曝气、UV/H2O2、UV/微曝气、H2O2/微曝气四种工艺对苯胺的去除率均随着时间的增长而提高,40 min后趋于平稳,最高去除率分别为97.9%,94.5%,64.27%和13.84%,UV/H2O2/微曝气、UV/H2O2出水苯胺均低于规定限值. 相似文献
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铁炭Fenton/SBR法处理硝基苯制药废水 总被引:18,自引:1,他引:18
为探寻硝基苯废水的适宜处理工艺,开展了铁炭Fentort/SBR工艺处理硝基苯制药废水的试验研究。结果表明,铁炭内电解结合Fenton氧化的预处理工艺可有效去除废水中的硝基苯类物质,并提高了废水的可生化性。当原水的pH值为2~3、H2O2投加量为500~600mg/L时,调节预处理出水pH值至7~8并经沉淀处理后,对COD和硝基苯类物质的总去除率分别可达47%和92%。后续混合废水经SBR工艺处理后出水水质能满足国家污水排放标准。 相似文献
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概述了高级氧化工艺的原理 ,介绍了以 H2 O2 、O3和 Ti O2 为基础的几种典型高级氧化工艺及其发展趋势 .指出高级氧化技术对于水中某些难降解持久性有机物的处理十分有效 ,可望在水处理中得到广泛应用 相似文献
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本试验采用UV/H2O2光氧化法处理含有较高浓度阴离子表面活性剂(LAS)的洗浴废水,研究了H2O2投加量、pH值、光照时间、紫外灯光强对LAS降解率的影响,并得出了一些有益的结论。 相似文献
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Application of ferrous hydrogen peroxide for treatment of DSD-acid manufacturing process wastewater 总被引:6,自引:0,他引:6
A pretreatment method for the biological treatment of wastewater from 4,4'-diaminostilbene-2,2'-disulfonic acid (DSD-acid) manufacturing processes, a refractory dye intermediate wastewater, based on combined ferrous hydrogen peroxide oxidation and coagulation-flocculation, was developed. When the wastewater was treated with ferrous hydrogen peroxide oxidation ([Fe2+] = 2.7 mmol/L, [H2O2] = 0.21 mol/L) after a flocculation using an organic flocculant TS-1 at a dosage of 3 g/L, the overall COD and color removals were 64 and 62%, respectively. BOD5/COD value of the effluent was 0.3. Ferrous hydrogen peroxide oxidation treatment can reduce the solubility of organic molecules with sulfonic group and increase the efficiency of coagulation treatment. The COD and color removals were both more than 90% when FeCl3 was used as the coagulation (dosages of two-step coagulation were 0.031 and 0.012 mol/L respectively) after a ferrous hydrogen peroxide oxidation pretreatment at a H2O2 dosage of 0.06 mol/L. 相似文献
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In the present study the treatment efficiency of different AOPs (O3/OH- H2O2/UV-C and TiO2/UV-A) were compared for the oxidation of simulated reactive dyebath effluent containing a mixture of monochlorotriazine type reactive dyes and various dye auxiliary chemicals at typical concentrations encountered in exhausted reactive dyebath liquors. A525 (color), UV280 (aromaticity) and TOC removal rates were assessed to screen the most appropriate oxidative process in terms of reactive dyebath effluent treatment. Special emphasis was laid on the effect of reaction pH and applied oxidant (O3, H2O2) dose on the observed reaction kinetics. It was established that the investigated AOPs were negatively affected by the Na2CO3 content (= 867 mg/L) which is always present at high concentrations in dychouse effluents since it is applied as a pH buffer and dye fixation agent during the reactive dyeing process. The ozonation reaction exhibited almost instantaneous decolorization kinetics and a reasonable TOC reduction rate. It appeared to be stable under the investigated advanced oxidation conditions and outranked the other studied AOPs based on the above mentioned criteria. Besides, the electrical energy requirements based on the EE/O parameter (the electrical energy required per order of pollutant removal in 1 m3 wastewater) was calculated for the homogenous AOPs in terms of decolorization kinetics. In view of the electrical energy efficiency, ozonation and H2O2/UV-C oxidation at the selected treatment conditions appear to be promising candidates for full-scale dyehouse effluent decolorization. 相似文献