活性炭催化臭氧氧化技术及其在水处理中的应用

活性炭催化臭氧氧化技术是以活性炭及其负载活性组分作为催化剂催化臭氧氧化有机污染物的水处理技术。近年来,由于其催化剂制备工艺简单,易于回收处理,成本较低且活性高,具有良好的发展前景,成为众多学者的研究热点。文章对负载型活性炭催化臭氧氧化进行介绍,阐述其在水处理中应用,指出其存在的问题并展望了今后的研究方向。     

催化臭氧氧化法深度处理腈纶废水的研究

以活性炭为载体,采用浸渍法制备Ni/C催化剂,应用于臭氧催化氧化腈纶废水技术中。考察了臭氧效率、催化剂投加量、pH及催化氧化时间对腈纶废水COD去除率的影响。结果表明:在臭氧效率50%、催化剂投加量2 g、pH=10.0、催化臭氧氧化时间40 min的实验条件下,对腈纶废水的COD去除率达到83.1%。     

催化臭氧氧化工艺中催化剂应用的研究进展

催化臭氧氧化法作为一种高级氧化技术，在难生物降解有机废水的深度处理领域具有良好的应用前景。催化剂可以促进臭氧分解并生成活性自由基，增强有机污染物的降解速率和矿化程度，是影响催化臭氧氧化法效能的关键因素。文章阐述了均相和非均相催化臭氧法的反应机理，在此基础上梳理了近年来催化臭氧氧化工艺中常用催化剂的分类和研究进展，包括金属离子、金属氧化物、碳基材料、矿物质材料等，并对其在工业废水深度处理上的应用进行总结，探讨了该技术目前存在的问题，并展望了未来研究方向及应用前景，包括新型高效催化剂的制备、复杂难降解废水臭氧化预处理、二级生化处理出水的深度处理等。     

臭氧催化氧化技术在废水处理中的研究进展

介绍了催化臭氧氧化的主要类别,分别叙述了均相和非均相臭氧催化氧化技术在降解废水中的应用及作用机理。分析了溶液pH值,臭氧投加量、投加方式、反应器,催化剂,反应温度等因素对臭氧催化氧化体系的影响。针对催化剂在催化臭氧氧化处理废水中存在的问题,对催化剂的制备指出改进的建议。根据不同的工业废水制备专项催化剂,并且与高效反应器结合是未来非均相催化臭氧化技术的发展方向。     

臭氧催化氧化技术在废水处理中的研究进展

介绍了催化臭氧氧化的主要类别,分别叙述了均相和非均相臭氧催化氧化技术在降解废水中的应用及作用机理。分析了溶液pH值,臭氧投加量、投加方式、反应器,催化剂,反应温度等因素对臭氧催化氧化体系的影响。针对催化剂在催化臭氧氧化处理废水中存在的问题,对催化剂的制备指出改进的建议。根据不同的工业废水制备专项催化剂,并且与高效反应器结合是未来非均相催化臭氧化技术的发展方向。     

非均相臭氧催化氧化技术处理有机废水研究进展

有机废水是以有机污染物为主的废水,极易造成水质富营养化,对环境危害大。处理有机废水的方法主要有吸附法、混凝法、芬顿氧化法、膜生物反应法和臭氧氧化法。臭氧催化氧化法主要通过在臭氧氧化体系中加入催化剂,可促进臭氧在水中的自分解,增加水中产生的羟基自由基浓度,从而提高臭氧氧化降解有机物的能力和效率。该方法由于条件可控,成本低廉,处置效率高等优点在有机废水处置领域具有广阔的应用前景。基于此,系统阐述了多种处理有机废水的技术方法以及臭氧催化氧化技术的研究概况,并且着重介绍了非均相臭氧催化氧化催化剂的研究进展。该研究为有机废水的高效处置提供一定的研究基础。     

多金属氧化物催化臭氧氧化有机污染物的研究进展

水中难降解有机污染物对环境安全和人类健康造成严重的威胁,作为高级氧化技术的一种,非均相催化臭氧氧化技术,被证明是降解有机污染物有效的处理技术。在非均相催化臭氧氧化技术中,多金属氧化物因其制备方法较为简便且多金属的复合促进氧化还原循环和电子传递,常被开发用于高效催化臭氧氧化的催化剂。综述了多金属氧化物,包括钙钛矿氧化物、尖晶石氧化物、天然矿石、羟基氧化物等多金属氧化物的制备方法、性质及作为催化剂在催化臭氧降解药物分子、染料、酚类、个人护理用品等多种有机污染物中的应用,总结多金属氧化物催化臭氧氧化有机污染物过程中的作用机理,为今后多金属氧化物的制备、应用及反应机理探究提供理论借鉴。     

MnOx/颗粒活性炭催化臭氧氧化技术降解硝基苯效能研究

通过半动态实验,对MnOx/GAC(颗粒活性炭)催化臭氧氧化技术氧化硝基苯的降解效能与动力学规律进行了初步研究.结果表明MnOx/GAC催化臭氧氧化过程对硝基苯具有较高的催化活性,在相同的反应条件下,MnOx/GAC催化臭氧氧化技术对硝基苯的降解效率是单独臭氧氧化的2.4倍.催化剂对硝基苯有一定的吸附作用.MnOx/GAC催化剂的存在提高了臭氧的利用率.MnOx/GAC催化臭氧氧化过程存在着催化剂最佳投量,硝基苯初始浓度与反应速率常数有良好的线性相关性,水质本底对MnOx/GAC催化臭氧氧化效率也有影响.     

科研与开发MnO_x/颗粒活性炭催化臭氧氧化技术降解硝基苯效能研究

通过半动态实验,对MnOx/GAC(颗粒活性炭)催化臭氧氧化技术氧化硝基苯的降解效能与动力学规律进行了初步研究。结果表明MnOx/GAC催化臭氧氧化过程对硝基苯具有较高的催化活性,在相同的反应条件下,MnOx/GAC催化臭氧氧化技术对硝基苯的降解效率是单独臭氧氧化的2.4倍。催化剂对硝基苯有一定的吸附作用。MnOx/GAC催化剂的存在提高了臭氧的利用率。MnOx/GAC催化臭氧氧化过程存在着催化剂最佳投量,硝基苯初始浓度与反应速率常数有良好的线性相关性,水质本底对MnOx/GAC催化臭氧氧化效率也有影响。     

MnOx/颗粒活性炭催化臭氧氧化技术降解硝基苯效能研究

通过半动态实验,对MnOx/GAC(颗粒活性炭)催化臭氧氧化技术氧化硝基苯的降解效能与动力学规律进行了初步研究.结果表明MnOx/GAC催化臭氧氧化过程对硝基苯具有较高的催化活性,在相同的反应条件下,MnOx/GAC催化臭氧氧化技术对硝基苯的降解效率是单独臭氧氧化的2.4倍.催化剂对硝基苯有一定的吸附作用.MnOx/GAC催化剂的存在提高了臭氧的利用率.MnOx/GAC催化臭氧氧化过程存在着催化剂最佳投量,硝基苯初始浓度与反应速率常数有良好的线性相关性,水质本底对MnOx/GAC催化臭氧氧化效率也有影响.     

催化臭氧化在环境中的应用

催化臭氧化是一种常见的高级氧化技术。文章从均相和非均相催化两方面对催化臭氧化进行了综述。阐述了催化臭氧化的反应机理,介绍了近年来催化臭氧化在水处理和大气中的应用,并对今后深入研究的方向进行了展望。     

Catalytic Ozonation of Sulfosalicylic Acid

The investigation of heterogeneous catalytic ozonation of sulfosalicylic acid (SSal) in aqueous solution is reported in this paper. It was found that catalytic ozonation in the presence of V-O supported on silica gel had a more positive effect on the removal rate (62% in 30 min) of total organic carbon (TOC) than that of ozonation alone (20% in 30 min), and the catalyst supported on TiO₂ had similar results. The experimental results also showed that the ozone dosage should be sufficient for achieving the catalytic effect. Efficient removal of TOC in catalytic ozonation was probably attributed to producing more powerful oxidants than molecular ozone.     

Catalytic ozonation of cinnamaldehyde to benzaldehyde over CaO: Experiments and intrinsic kinetics

The preparation, characterization of CaO and its application in the catalytic ozonation of cinnamaldehyde to benzaldehyde were studied. The calcination temperature greatly affected the physicochemical properties of CaO, and the CaO calcined at 900°C exhibited the optimal ozone utilization efficiency. When using 0.20 g CaO calcined at 900°C, 750 mL·min^?1 oxygen flow rate for generating O₃, and reacted at 0°C for 210 min, the cinnamaldehyde conversion reached 97.77%, as well as the benzaldehyde yield was 59.51%. And the cinnamaldehyde conversion in a catalytic ozonation on CaO catalyst maintained above 90% for four used cycles, which exhibited reasonable catalyst stability. The electron donating process of surface O^2‐ on the catalyst is the key to improve the benzaldehyde yield, and based on the intrinsic kinetic study, the Eley‐Rideal kinetic model with cinnamaldehyde being adsorbed was the appropriate model for the catalytic ozonation of cinnamaldehyde on CaO. © 2017 American Institute of Chemical Engineers AIChE J, 63: 4403–4417, 2017     

Catalytic ozonation of natural organic matter on alumina

The paper aims to show the potential of catalytic ozonation in the presence of alumina for the removal of natural organic mater from drinking water. An investigation into the efficiency of catalytic ozonation, ozonation by-products formation and their biodegradability was the main goal of the paper. Characterisation of fresh and worn alumina was also conducted. The results clearly indicated the high activity of alumina over a long period of time, which is crucial in water treatment technology. The application of alumina to the ozonation system doubled the efficiency of NOM removal from water when compared to ozonation alone. Furthermore, catalytic ozonation resulted in lower by-products and biodegradable organic carbon formation.     

Urban Wastewater Treatment by Catalytic Ozonation

This study focuses on the catalytic ozonation of organic matter recalcitrant to usual water treatment technologies. Experiments aimed to investigate the efficiency of the process TOCCATA®, which uses a granular catalyst coupled with ozonation. Comparison was made between single ozonation, single adsorption onto the catalyst and catalytic ozonation. Adsorption was proven to contribute to decreased dissolved organic carbon. Catalytic ozonation enhanced organic matter removal and ozone transfer compared to single ozonation. Catalytic ozonation was modeled with global apparent first-order kinetics and single adsorption with pseudo–second-order sorption kinetics.     

Catalytic ozonation of dimethyl phthalate with RuO2/Al2O3 catalysts prepared by microwave irradiation

Ruthenium catalysts supported on alumina were synthesized by microwave irradiation and used to catalyze ozonation of dimethyl phthalate in water. The catalysts enhanced greatly the TOC (total organic carbon) removal. The contribution of catalysis and adsorption to the overall TOC removal were 33% and 50%, respectively. 300 W was the optimal irradiation power for catalyst preparation. Moisture content had little effect on the catalytic activity. Compared to conventional irradiation, microwave irradiation benefited the catalytic activity because it provided a homogeneous dispersion of metal on the support. It is a promising thermal treatment method for developing the catalysts used in catalytic ozonation.     

金属及其氧化物催化臭氧化反应的研究进展

介绍了金属及其氧化物催化臭氧化降解水中有机物的应用及其反应机理的研究进展；探讨了影响催化剂催化活性和催化臭氧化效率的因素及金属及其氧化物的催化性能；分析了催化臭氧化过程的反应途径。     

Manganese-Based Catalysts for the Catalytic Remediation of Phenolic Acids by Ozone

Manganese-based catalysts supported on Al₂O₃, TiO₂, ZrO₂ and CeO₂ were tested for the catalytic ozonation of a simulated wastewater involving phenolic acids. Comparing the Mn-Ce catalysts preparation method, wetness impregnation and co-precipitation, the last one showed to be more active. Moreover, the increase of Mn/Ce molar proportion from 22/78 to 70/30 increased the ozonation efficiency. The catalysts stability in terms of Mn leaching, carbon adsorption and effluent biodegradability was evaluated. Mn-Ce-O (70/30) CP shows to be the most suitable catalyst to improve phenolic wastewaters catalytic remediation by ozone.     

纳米TiO_2催化臭氧化降解水中草酸

本实验以钛酸四丁酯为前驱物,乙醇和正己烷作为晶形导向剂,通过水热法合成不同晶形的TiO2催化剂。催化剂的结构特性采用X射线衍射(XRD)来表征。催化剂的催化活性通过对水中草酸晶形催化臭氧化降解来进行评估;通过研究叔丁醇对催化剂臭氧化反应的影响,证明反应遵循羟基自由基(HO·)反应机理。