共查询到19条相似文献,搜索用时 125 毫秒
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电化学法处理废水研究进展 总被引:2,自引:0,他引:2
阐述了电解法、电絮凝和电气浮、内电解以及电渗析在废水处理中的研究现状,讨论了催化电极和三维电极对电化学处理效果的重要影响;并介绍了电化学法与其他技术的联合处理工艺,对今后使用电化学法处理废水的研究进行了展望. 相似文献
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电极材料是影响电化学废水处理体系性能的关键因素之一。介绍了电极材料对电化学处理废水反应机制的影响,重点介绍了电极材料对电化学处理废水效率及处理过程产气的影响和电极的改性技术的研究进展。电极材料不仅影响电化学降解过程中的反应类型,而且影响直接电化学氧化和间接电化学氧化在整个电催化氧化作用中的比例、电化学处理废水效率,还影响电极表面的产气种类(如析H_2、O_2、Cl_2及产CO_2、N_2、NH_3等),并因此影响能耗;电极表面涂层的元素掺杂及添加中间层可以提高电极的电催化氧化性能。为电化学处理废水技术合理选择电极提供了技术参考。 相似文献
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《化学工业与工程技术》2016,(4):78-82
对油田污水的性质、组成及危害进行了简要叙述。介绍了利用电化学技术处理油田污水的原理,以及目前国内外应用的主要方法,包括微电解法、电解气浮法和电化学氧化法等。分析了电化学技术用于油田污水处理的优缺点,如高效、清洁、安全,但能耗较高,电极材料的稳定性、活性和寿命较低。综述了电化学技术处理油田污水的研究和应用进展,提出了电化学处理油田污水的研究重点和改进方向,主要包括电化学技术与其他化学方法联合处理,发挥协同作用,改善处理效果;研发特殊的电化学处理设备,提高处理效率;开发低成本、高催化活性和使用寿命稳定长久的电极材料,通过电化学氧化技术提高有机难降解物质的处理效果;将新型清洁能源与电化学技术相结合,降低处理能耗。 相似文献
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Design of the Photovoltaic Solar Electro-Oxidation (PSEO) process for wastewater treatment 总被引:1,自引:0,他引:1
Enrique Alvarez-Guerra Antonio Dominguez-RamosAngel Irabien 《Chemical Engineering Research and Design》2011,89(12):2679-2685
The Photovoltaic Solar Electro-Oxidation (PSEO) process combines the effectiveness of the electrochemical oxidation based on boron-doped anodes to mineralize organic matter, with the autonomy and environmentally friendly characteristics of photovoltaic solar energy. The PSEO process constitutes an attractive technology for the treatment of urban wastewaters of isolated communities where standard solutions cannot be applied. The aim of this work is the design of this process, which implies the sizing of the electrochemical reactor and the photovoltaic modules. The input variables for the design are the characteristics of the effluent, the wastewater flow rate (which depends on the number of equivalent inhabitants for whom the plant operates), the required yield and the solar irradiance. The solar irradiance depends on the location in which the PSEO process is applied, since differences in the required PV module area higher than 170% are obtained in several locations in Spain. Moreover, the residence time distribution in the reactor also significantly affects the dimensions of the electrode (Aa) and solar module (NAPV) areas. 相似文献
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Kinetic modelling of the electrochemical mineralization of organic pollutants for wastewater treatment 总被引:1,自引:0,他引:1
Agnieszka Kapałka György Fóti Christos Comninellis 《Journal of Applied Electrochemistry》2008,38(1):7-16
The electrochemical mineralization of organic pollutants is a new technology for treatment of dilute wastewater (COD < 5 g L−1). In this method, use of the electrical energy can produce complete oxidation of pollutants on high oxidation power anodes.
An ideal anode for this type of treatment is a boron-doped diamond electrode (BDD) characterized by a high reactivity towards
oxidation of organics. In the present work kinetic aspects of organic mineralization is discussed. The proposed theoretical
kinetic model on boron-doped diamond anodes is in excellent agreement with experimental results. In addition economic aspects
of electrochemical organic mineralization are reported. 相似文献
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微生物燃料电池(Microbial fuel cell,MFC)是一种非常有前途的环境友好型电化学装置,它可以利用电活性微生物从废水中提取能源,并降解废水中的有机物,是解决目前环境与能源危机的重要技术。然而,相对较低的产电效率限制了其大规模应用,主要体现在阳极缓慢的胞外电子传递速率(extracellular electron transfer,EET)和较少的产电微生物附着量。纳米纤维由于具有高的比表面积、良好的电化学性能和电导率,是改善阳极的重要材料。本文介绍了影响阳极材料性能的因素,系统总结了近年来国内外纳米纤维基阳极材料的种类与制备方法,针对纳米纤维基阳极材料在MFC领域的研究现状,重点解释了各种纳米纤维材料的优缺点。最后,对纳米纤维基电极材料以及MFC技术的发展方向进行了展望,以期为推动MFC的工程化应用提供理论参考。 相似文献
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G. R. Agladze G. S. Tsurtsumia B. -I. Jung J. -S. Kim G. Gorelishvili 《Journal of Applied Electrochemistry》2007,37(9):985-990
The technological and economic aspects of using the Fenton process to treat industrial wastewater containing morpholyne and
diethylethanolamine, as well as sodium salts of naphthalene sulfonic acid and of ethylenediaminetetraacetic acid based on
data obtained in pilot tests are discussed. Chemical Fenton technology was tested using commercial 30–35% solutions of H2O2 and iron (II) salts, which was followed by the additional electrochemical destruction of organic pollutants in an undivided
reactor with catalytic stable anodes (CSA) and 1 g L−1 NaCl as a supporting electrolyte and a source of active chlorine. An alternative electrochemical method involving the electrogeneration
of hydrogen peroxide in polluted water at the gas
-diffusion cathode was studied both with the addition of ferrous salt to the electrolyte prior to electrolysis (in-cell electro-Fenton)
as well as with the post-electrolysis addition of Fe2+ in another reactor (ex-cell electro-Fenton). The accumulation of hydrogen peroxide in concentrations sufficient for the mineralization
of organic pollutants was achieved in both cases with near 100% current efficiency. In comparison with wastewater treatment
processes which use a purchased hydrogen peroxide reagent, the Fenton-like processes achieved an economic savings of as much
as 64.5% in running costs due to the on-site electrochemical generation of H2O2. Preparative electrolysis in the membrane reactor showed higher current efficiencies and lower specific energy consumptions
for H2O2 electrogeneration in comparison with the results of tests carried out in an undivided cell. 相似文献
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介绍了微电解法的反应机理,重点介绍了采用微电解法脱氮工艺、曝气微电解工艺以及微电解法与其他工艺相结合的工艺处理焦化废水的研究进展。微电解过程主要基于电化学中的电池反应,反应过程生成的产物具有强氧化还原性,使常态难以进行的反应得以实现。与传统工艺相比,微电解法处理焦化废水具有许多优点,可获得较好的环境效益和经济效益。 相似文献
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N. Balasubramanian Toshinori Kojima C. Srinivasakannan 《Chemical engineering journal (Lausanne, Switzerland : 1996)》2009,155(1-2):76-82
Arsenic removal from water/wastewater has been the subject of top priority among researchers/industries in recent years due its notorious characteristics. A novel technique of electrocoagulation has been attempted in the present investigation to remove arsenic from aqueous solution. Experiments were carried out in a batch electrochemical reactor using aluminum and mild steel sacrificial anodes. The mechanism of electrocoagulation has been modeled using adsorption isotherm kinetics. Experimental runs were designed by response surface methodology and the influence of combined effects of operating parameters on arsenic removal has been critically examined. 相似文献