共查询到17条相似文献,搜索用时 78 毫秒
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刘德启 《环境污染治理技术与设备》2005,6(9):29-32
探讨利用木质素-二氧化硅凝胶制备高比表面稀土催化剂的方法、性能及其在非均相催化体系中稀土催化剂对双氧水的催化行为与效果.结果表明,负载型稀土对双氧水产生羟基自由基氧化染料中间体废水具有明显的增效行为,并对该行为的机理进行了探讨. 相似文献
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CuO/γ-Al_2O_3的制备及其湿式催化氧化性能研究 总被引:2,自引:1,他引:1
针对常温常压的废水双氧水催化氧化,采用浸渍法制备CuO/γ-Al2O3催化剂,利用比表面积、XRD手段表征了制备工艺对催化剂的影响,以模拟苯酚废水为研究对象考察催化剂的催化性能.研究表明,焙烧温度和活性组分含量等显著影响催化剂的性能,催化剂对双氧水催化氧化苯酚溶液具有较高的催化活性. 相似文献
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双氧水催化氧化中Cu/γ-Al_2O_3催化剂的稳定性研究 总被引:1,自引:1,他引:0
针对废水湿式双氧水催化氧化,采用浸渍法制备Cu催化剂,研究非均相Cu催化剂在常温常压湿式双氧水催化氧化中的稳定性与失活问题。研究表明,催化剂制备条件及催化氧化反应条件对催化剂中Cu2+溶出均有影响。研究同时表明,催化剂失活与活性组分流失和活性组分被有机中间产物覆盖有关,高温焙烧可对催化剂再生。 相似文献
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针对废水湿式双氧水催化氧化,采用浸渍法制备Cu催化剂,研究非均相Cu催化剂在常温常压湿式双氧水催化氧化中的稳定性与失活问题。研究表明,催化剂制备条件及催化氧化反应条件对催化剂中Cu2+溶出均有影响。研究同时表明,催化剂失活与活性组分流失和活性组分被有机中间产物覆盖有关,高温焙烧可对催化剂再生。 相似文献
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针对常温常压的废水双氧水催化氧化,采用浸渍法制备CuO/y-Al2O3催化剂,利用比表面积、XRD手段表征了制备工艺对催化剂的影响,以模拟苯酚废水为研究对象考察催化剂的催化性能。研究表明,焙烧温度和活性组分含量等显著影响催化剂的性能,催化剂对双氧水催化氧化苯酚溶液具有较高的催化活性。 相似文献
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CuO/γ-Al2O3的制备及其湿式催化氧化性能研究 总被引:1,自引:1,他引:0
针对常温常压的废水双氧水催化氧化,采用浸渍法制备CuO/γ-Al2O3催化剂,利用比表面积、XRD手段表征了制备工艺对催化剂的影响,以模拟苯酚废水为研究对象考察催化剂的催化性能。研究表明,焙烧温度和活性组分含量等显著影响催化剂的性能,催化剂对双氧水催化氧化苯酚溶液具有较高的催化活性。 相似文献
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利用浸渍法制备了Cu—Mn复合氧化物催化剂和加入不同稀土含量的Cu—Mn复合氧化物催化剂,通过实验优选出加入稀土催化剂中稀土含量的最优配比,以气相色谱为检测手段,考察了加入稀土和不加稀土催化剂的催化燃烧性能,结果表明,加入稀土的催化剂T99(催化处理效率达到99%时的温度)比不加稀土的催化剂降低30~40℃,具有更好的低温活性,且对多种VOCs均能降低反应温度。 相似文献
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研究了微波辐射下,以负载于沸石上的三氧化二铋为催化剂,以双氧水为氧化剂的催化氧化体系处理硝基苯工艺。通过单因素实验法,从反应催化剂负载量、pH、双氧水用量、微波功率、反应时间、催化剂用量等方面初步考察了硝基苯在该体系中的催化氧化效果。在氧化铋负载量3%(质量比),pH=2,2 mL 30%双氧水,火力为中火,催化剂投加量为0.7 g,反应2 m in,对降解过程所得的中间产物和终产物进行了分析。结果表明,该体系对硝基苯的去除率能够达到99.2%,COD去除率为73.91%。 相似文献
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Najm us Saqib Rohana Adnan Irfan Shah 《Environmental science and pollution research international》2016,23(16):15941-15951
Titanium dioxide (TiO2) has been considered a useful material for the treatment of wastewater due to its non-toxic character, chemical stability and excellent electrical and optical properties which contribute in its wide range of applications, particularly in environmental remediation technology. However, the wide band gap of TiO2 photocatalyst (anatase phase, 3.20 eV) limits its photocatalytic activity to the ultraviolet region of light. Besides that, the electron-hole pair recombination has been found to reduce the efficiency of the photocatalyst. To overcome these problems, tailoring of TiO2 surface with rare earth metals to improve its surface, optical and photocatalytic properties has been investigated by many researchers. The surface modifications with rare earth metals proved to enhance the efficiency of TiO2 photocatalyts by way of reducing the band gap by shifting the working wavelength to the visible region and inhibiting the anatase-to-rutile phase transformations. This review paper summarises the attempts on modification of TiO2 using rare earth metals describing their effect on the photocatalytic activities of the modified TiO2 photocatalyst. 相似文献
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Cytochrome P450 (CYP450) genes play an important role in catalyzing oxidative metabolism of toxicants. Recently, CYP1 subfamily were discovered and reported in fish, however, little is known regarding the CYP2 isoforms in fish. In the present study, the cDNA fragments of CYP 1B1 and 1C1 and CYP2Aa, 2Y3, and 2K of rare minnow were cloned and exhibited a high amino acid sequence identity compared with their zebrafish orthologs. Basal expression showed CYP1C1 and CYP 2Aa expression were observed in all eight tissues analyzed (liver, gill, intestine, kidney, spleen, brain, skin, and muscle). CYP 1A, and 1B1 expression was found in all tissues except for muscle and skin. However, CYP 2Y3 was expressed in liver, spleen, intestine and muscle whereas CYP 2 K in liver, kidney and intestine. 4 and 100 μg L−1 Benzo[a]pyrene (BaP) induced patterns showed that CYP 1A, 1B1 and 1C1 expression in liver, gill, and intestine was strongly up-regulated (p < 0.05). Furthermore, CYP 2Y3 was strongly induced in liver from BaP treatments (p < 0.05). The high induction on mRNA level of CYP1s and CYP 2Y3 by BaP could be associated with catalyzing detoxification and indicated that CYP2s may also be potential biomarker to screen AHR agonist. The high responsiveness of CYP1 and 2 genes suggested Chinese rare minnow is feasible to screen and assess pollution with AHR agonist. 相似文献