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针对化工集装罐清洗废水中含酚废水浓度大的特点,采用湿式催化氧化法进行了较深入的研究。对硝酸铜-AC制备CuO/AC催化剂过程中的浸渍液浓度、焙烧温度、焙烧时间等影响因素进行探讨;用该催化剂催化氧化降解模拟苯酚废水,对反应温度、氧化剂投加量、催化剂投加量、反应时间等工艺参数进行优化,确定最佳反应条件并进行了应用研究。研究结果表明,硝酸铜-AC制备CuO/AC催化剂的最佳条件为:硝酸铜质量分数为3%,浸渍温度为30℃,浸渍时间为6 h,焙烧温度为300℃,焙烧时间为3 h。湿式催化氧化法处理苯酚废水的最佳工艺条件为:反应温度为170℃,反应时间为1 h,催化剂投加质量浓度为2 g/L,氧化剂H2O2按m(H2O2)∶m(COD)=3投加,含酚清洗废水的COD去除率达到95%以上,处理效果显著。 相似文献
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采用自制电催化设备处理实际苯胺工业废水,探讨在电催化处理过程中各种单因素对处理效果的影响,并结合正交实验及成本问题确定最优处理条件为:电极形貌为网状、pH值为5.41,处理时间为60 min、电解质NaCl的投加量为4 g/L,电流密度为25 mA/cm~2,此时苯胺的去除率为99%,废水中COD的去除率达到60%以上,对电催化氧化处理苯胺废水的应用提供基础。 相似文献
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以电催化氧化为主要技术,采用电催化氧化-吸附工艺预处理2-氯-5-氯甲基噻唑废水,考察了废水初始pH值、电流、时间等对电催化氧化COD去除率及处理后废水pH值的影响,同时选取了活性炭和膨润土作为吸附剂处理电催化氧化后的电解液,考察了两吸附剂对COD去除率及处理后废水pH值的影响。结果表明,电催化氧化的适宜条件为初始pH值=7,电流为15A,电解时间为4 h,在此条件下,电催化氧化对COD的去除率为87.3%;膨润土吸附效果优于活性炭,膨润土的适宜吸附时间为40 min,吸附后对电解液COD的去除率为28.9%,且吸附后废水呈中性。 相似文献
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通过浸渍法制备了包含四类主活性组分的负载型催化剂,用于二氧化氯催化湿式氧化(CWCDO)处理印染废水、有机农药废水.由实验确定了催化湿式氧化的条件,结果表明,四元组合MnO2-CuO-CeO2-V2O5(质量比为2:4:1:1)催化剂性能较好,反应在常温常压下,维持pH为3.0~5.0,反应时间为30 min时,COD的去除率大于85%,色度去除率大于90%. 相似文献
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ABSTRACT Treatments of phenol formaldehyde producing wastewater (PFPW) by electrooxidation (EO) and electro-Fenton (EF) successive processes were carried out in a batch electrolytic reactor using graphite (Gr) and stainless steel (Ss) electrodes. After the completion of the EO process, the wastewater was further treated with EF process. The influence of operating variables such as current density, operating time, initial pHi and H2O2 concentration was evaluated for removals of phenol, TOC and COD in PFPW. Gr/Gr, Gr/Ss or Ss/Ss and Ss/Gr electrode pair were used as anode and cathode. The best removal efficiency in the EO process was obtained with Gr/Gr (93%) as compared to Gr/Ss (82%), Ss/Ss (63%) and Ss/Gr (55%). The removal efficiencies for the EO process using Gr-Gr electrode pair were obtained as 93% for phenol, 61% for COD and 44% for TOC at initial pHi 7,5 g/L of NaCl, 50 mA/cm2 and 5 h. In the EF process, the removal efficiencies at pHi 3,5 mA/cm2 and 30 mM H2O2 and 45 min were 100% for phenol, 76% for COD and 59% for TOC. This study provided that the successive processes are an effective method for the removal of phenolic compounds from the wastewater. 相似文献
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电催化氧化降解工业废水的研究 总被引:2,自引:0,他引:2
采用电催化氧化技术(electrocatalysistechnology)在电解槽中直接生成羟基自由基与Fe(OH)3絮凝剂,并对酚类、磺酸类及染整工业废水进行了降解研究。研究表明,电生成Fenton技术在处理还原型工业废水中均有很好的降解效果。对邻苯二酚和间苯三酚均有较高的电流效率,对间苯二酚和间苯三酚的CODCr去除率达80%以上;对十二烷基苯磺酸钠CODCr的去除率达到85%;对茜素红等染料的脱色率达100%,CODCr的去除率达到70%。 相似文献
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Cerium?Czirconia-supported ruthenium and activated carbon catalysts were used in catalytic wet air (CWAO) and wet peroxide (CWPO) oxidation of industrial wastewater. Both catalysts were active in the removal of TOC and COD from the wastewater. The degree of biodegradation of organic matter increased during CWAO. Therefore, the CWAO process could be considered as a potential pre-treatment process integrated with subsequent biological treatment to achieve the required level of purification of wastewater. 相似文献
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采用新型钛基网状电极对电镀废水进行了电催化氧化研究,在间歇试验条件下考察了电流密度、处理时间和原水初始pH对有机污染物处理效果的影响,在连续试验条件下考察了工艺的稳定性,并结合GC-MS中间产物分析探讨了电催化氧化对废水可生化性的影响。结果表明,处理时间、电流密度和原水起始pH对COD去除效果有显著影响,优化的试验参数为:电流密度100 A.m-2,处理时间3 h,起始pH为中性。在该条件下,废水COD可由439 mg.L-1降至70 mg.L-1,且装置运行稳定,吨水处理能耗为5.7 kWh。长链烷烃等大分子有机物在电催化氧化过程中被分解为短链烷烃和小分子有机物,废水可生化性得到显著改善。 相似文献
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郑育元 《化学反应工程与工艺》2017,33(2)
以纳米TiO_2为载体,通过优化制备方法,合成了高活性的Ru/TiO_2贵金属催化剂,采用X射线衍射(XRD)、N_2物理吸附、程序升温还原(H_2-TPR)和透射电镜(TEM)等手段对催化剂进行表征,并将制备的催化剂应用到湿式氧化处理3种有机酸模拟废水中。研究表明,氢气还原有助于Ru在TiO_2表面的分散,由此制备的催化剂氧化活性较高。在200℃,初始氧压3 MPa的条件下反应2 h,Ru/TiO_2在湿式氧化处理丙烯酸、丁二酸和乙酸有机酸模拟废水时,化学需氧量(COD)去除率分别达到95.3%,91.6%和70.1%。 相似文献
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几种电化学法处理苯酚废水对比试验研究 总被引:5,自引:1,他引:4
以苯酚模拟废水为研究对象,对几种电化学法处理苯酚废水的效果进行对比研究,采用正交试验对pH值、电解电压、电解质浓度,电解时间等4个因素对苯酚去除率的影响进行分析,并确定最佳反应条件。试验结果表明,电催化氧化法处理苯酚废水的最佳反应条件为:pH值为6,电解电压为9 V,电解质的质量浓度为20 g/L,电解时间为120 min;电-Fenton法处理苯酚废水的最佳反应条件为:pH值为3,电解电压为9 V,电解质的质量浓度为20 g/L,电解时间为120 min;在此基础上,三维电极法最佳活性炭投加量为150 g/L。4种电化学法处理苯酚废水效果的优劣顺序依次为:三维电极与电-Fenton耦合法三维电极法电-Fenton法电催化氧化法。 相似文献
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V. Yu. Doluda E. M. Sulman V. G. Matveeva M. G. Sulman A. V. Bykov N. V. Lakina A. I. Sidorov P. M. Valetsky L. M. Bronstein 《Topics in Catalysis》2013,56(9-10):688-695
Catalytic wet air oxidation (CWAO) of phenols is an important process of environmental catalysis, allowing one to reach nearly complete oxidation of phenols to non-hazardous compounds. Here we report syntheses of nanocatalysts based on Ru-containing nanoparticles (NPs) formed in the pores of hypercrosslinked polystyrene (HPS) and their catalytic properties in the phenol CWAO under mild conditions. The Ru species were incorporated in HPS using wet impregnation of ruthenium(IV) hydroxychloride in a complex solvent followed by the NaOH and H2O2 treatment. The catalysts containing from 0.5 to 2.8 wt% of Ru were studied by X-ray fluorescence analysis, transmission electron microscopy, X-ray photoelectron spectroscopy, and liquid nitrogen physisorption methods. The NP sizes were controlled by the pores of HPS. The two types of Ru species: Ru(IV) and Ru(IV) × nH2O, constituted the NP composition. The effects of the phenol and catalyst initial concentrations and temperature were investigated in the phenol CWAO. Removal of 97 % of phenol was observed for the most active catalyst containing 2.8 wt% of Ru. 相似文献