电-Fenton法废水处理技术的研究现状与进展

电-Fenton法是一种新兴的废水处理技术,在水处理中的应用越来越受到关注。作者综述了电-Fenton技术的特性、动力学特征、各种形式及其特点,以及国内外电-Fenton废水处理技术的试验研究现状。同时提出了该技术亟待解决的突出问题和发展动向．指出高效催化性能的阴极材料的开发应用是电-Fenton法最具潜力的发展方向。     

（光）电-Fenton法降解有毒有机污染物的研究进展

(光)电-Fenton法是能有效降解水中有毒有机污染物的高级氧化技术.综述了(光)电-Fenton法特性,重点从阳极氧化、阴极还原氧气生成双氧水和电絮凝作用等方面概述了(光)电-Fenton法降解有毒有机污染物的研究进展,结合其在工业废水有毒有机污染物处理中的应用,总结了其应用现状及发展趋势.     

苯酚废水电化学处理方法研究进展

苯酚的降解机理是将苯酚先降解为对苯二酚和邻苯二酚,然后降解为小分子乙二酸,最终降解为二氧化碳和水的过程。介绍了近年来苯酚废水电化学处理方法的研究进展,包括三维电极法、三维电极与电-Fenton耦合法、电催化氧化法、电-Fenton法。对这些方法做了比较,并对今后研究方向提出建议,需要在苯酚的降解工艺、降解率的影响因素及电级材料选取和制备方面做近一步的研究和探讨。     

Fenton法的氧化机理及在废水处理中的应用进展

阐述了普通Fenton法、光-Fenton法和电-Fenton法的原理及应用,并对各种类型的Fenton法的优势,问题及发展趋势作了评述,尤其介绍了它和其它技术(生物法、混凝法、吸附法)联用的优势及应用情况.     

Fenton及改进Fenton氧化处理难降解有机废水的研究进展

介绍了在难降解有机废水处理方面具有良好前景的Fenton氧化技术,重点探讨了Fenton、超声-Fenton、电-Fenton、光-Fenton、超声-光-Fenton、光-电-Fenton、非均相纳米催化-Fenton氧化技术的机理、特点及其主要应用研究现状。此外,展望了Fenton及改进Fenton氧化技术的发展趋势和研究重点。     

高压脉冲电凝-Fenton氧化工艺处理制药废水试验研究

采用高压脉冲电凝-Fenton氧化工艺对制药废水进行处理,探讨了进水pH值、极板间距、反应时间、H2O2投加量等因素对去除制药废水CODCr的影响.研究表明:高压脉冲电凝-Fenton氧化法的最佳工况条件为:进水pH值为4左右、极板间距为20 mm、电流强度为10A、高压脉冲电凝反应时间为45 min、H2O2投加量为...     

Fenton氧化法处理废水的机理及应用

阐述了Fenton试剂的氧化机理 ,分析了各项因素对氧化效果的影响。介绍了光 -Fenton法、电 -Fenton法及Fenton -混凝法在废水处理中应用情况以及存在的问题 ,并展望了其发展趋势。     

电化学法处理工业废水和生活污水的研究与应用

工业废水和城市生活废水中组成越来越复杂,可采用电化学法进行废水处理。综述了电化学法处理废水的优缺点,介绍了电解絮凝法、电解气浮法、电催化氧化法和电-Fenton法的作用原理,举例说明了电化学法在海上平台生活污水、高盐度废水、含铬废水和乳化废水处理中的应用,并提出了电化学法目前应用所遇到的问题和今后的研究发展方向。     

Fenton试剂氧化机理及印染废水处理研究进展

系统的分析了Fenton试剂、光助-Fenton、电-Fenton、超声-Fenton对有机污染物的降解机理,概述了Fenton氧化以及Fenton氧化与其它处理方法组合使用的技术在印染废水中的处理的运用,Fenton法对印染废水的色度和COD能够进行有效的去除,总结了Fenton氧化技术的发展历程,提出了Fenton氧化技术将沿着类Fenton以及和其他方法组合的方向发展。     

Fenton法在垃圾渗滤液处理中的应用及研究进展

垃圾渗滤液尤其是长龄渗滤液很难通过单一的生化法实现有效处理,研究显示,Fenton氧化技术是一种应用和研究最多、处理效果最好的物化方法。为了进一步克服该法的缺陷并充分发挥其优势,近期的研究多对传统的Fenton氧化技术进行了技术优化和改进,并指出高效的电-Fenton法、光-Fenton法降解机制的深入研究以及其操作条件的优化将是日后的重点所在。     

Treatment of a mixture of three pesticides by photo- and electro-Fenton processes

In the present work, a comparative study of a mixture of three pesticides (chlortoluron, carbofuran and bentazon) has been investigated by advanced oxidation processes such as photo-Fenton and electro-Fenton. These processes are based on the in situ production of hydroxyl radical, a highly strong oxidant, which allows the degradation of organic pollutants until their mineralization into CO₂ and H₂O. For the photo-Fenton process, the effect of key parameters such as initial catalyst (Fe³⁺) concentration and hydrogen peroxide (H₂O₂) dosage were studied. Under optimal operating conditions, the evolution of total organic carbon (TOC) has been investigated for the two processes. Obtained results showed that more than 90% of TOC removal was obtained after only 2 h of photo-Fenton treatment whereas the electro-Fenton process needed 8 h of treatment. Nevertheless, the comparison of cost treatment shows that the photo-Fenton process is more expensive than electro-Fenton. The evolution of pesticide's concentration during treatment was determined by high performance liquid chromatography (HPLC). Inorganic ions released such as chloride, nitrate, sulphate and ammonium ions are identified and their kinetic evolution was measured by ion chromatographic analyses.     

电生成Fenton试剂在废水处理中的应用

介绍了电生成Fenton试剂的反应机理及其在各类废水处理中的应用.研究发现,电生成Fenton试剂对各类废水都具有良好的处理效果,是一种优良的废水处理新技术.     

MnOx掺杂纳米石墨阴极制备及其催化降解能力

采用溶胶-凝胶法和热压法制备锰氧化物掺杂的纳米石墨(Nano-G)电极（MnOx/Nano-G电极）,并以其为工作电极,构建了能够高效处理水中盐酸四环素（tetracycline hydroxhloride, TCH）的阴极电芬顿体系。运用SEM、XRD、XPS、循环伏安测试和电化学阻抗测试等对MnOx/Nano-G电极进行表征。研究结果表明,MnOx的掺杂可以明显提高Nano-G电极的导电性、电化学稳定性和电化学活性,从而大幅提升阴极电芬顿处理TCH的效能。在TCH初始浓度为20 mg?L-1、电流密度为30 mA?cm-2、初始pH为5.0、极板距离为10mm时,TCH的降解效果最佳;反应60min后,59.27%的TCH被有效去除,相较于未改性的Nano-G电极,TCH降解效率提高了18.70%。此外,MnOx/Nano-G的阴极电芬顿体系的处理效能明显高于传统的RuO2-IrO2/Ti和钛网阴极。综上,MnOx/Nano-G的阴极电芬顿体系是一种高效且具有应用前景的TCH处理技术。     

碳纤维类材料用于电芬顿体系电极的研究现状

电芬顿技术作为先进氧化技术的一种，基于电化学原理间接性地产生·OH自由基，可以高效快速地去除水中的有机污染物。碳纤维类材料因其比表面积大、密度低、耐腐蚀等优点而被常用作电芬顿体系的电极材料。本文首先介绍了电芬顿技术的基本原理，对近年来碳纤维类材料用于电芬顿电极的研究现状进行了归纳总结，分析了碳纤维材料用于电芬顿电极时的改性手段及应用方式。着重分析了其用于电芬顿阴极时的改性机理与改性方式，并指出了其应用优势与局限性。同时也对碳纤维类材料在电芬顿阳极的应用进行了总结。最后，针对碳纤维类材料用于电芬顿体系时的产业化问题、能耗问题、电极的多功能化等问题进行了分析和展望，为碳纤维类材料应用于电芬顿体系的深入研究提供参考。     

Bio-electro-Fenton systems for sustainable wastewater treatment: mechanisms,novel configurations,recent advances,LCA and challenges. An updated review

Bio-electro-Fenton processes use biological electrons produced from bioelectrochemical systems to treat wastewater. The most significant advantages of bio-electro-Fenton systems are high effectiveness, low toxicity, gentle operation conditions, environmentally friendly treatment without sludge accumulation and energy conservation. Though promising, bio-electro-Fenton systems still face several challenges, such as high power density, H₂O₂ concentration, cathode materials, Fe²⁺ concentration and pH. This review comprehensively discusses the mechanisms of bio-electro-Fenton systems. Then, structural configurations are critically reviewed, including microbial fuel cells coupled with electro-Fenton systems, microbial electrolysis cells coupled with electro-Fenton systems and other bioelectrochemical systems coupled with electro-Fenton systems. Furthermore, recent advances in bio-electro-Fenton systems for wastewater treatment are introduced, including dye solution, pharmaceuticals and personal care products, oily wastewater, landfill leachate and other pollutants. In addition, the current challenges and specific future prospects of bio-electro-Fenton, such as possible mechanisms for improving the power output, electrode materials that are potentially useful, self-designed electrodes and methods of maintaining circumneutral pH values, are also explored. Heretofore, great progress in bio-electro-Fenton has been made, but further improvements are still needed in order to make this system more economical and practical. © 2020 Society of Chemical Industry     

Electro-Fenton degradation of azo dye using polypyrrole/anthraquinonedisulphonate composite film modified graphite cathode in acidic aqueous solutions

Amaranth azo dye has been degraded by electro-Fenton method using an undivided cell containing the polypyrrole (PPy)/anthraquinonedisulphonate (AQDS) composite film modified graphite cathode and Pt anode. In acidic media, the PPy/AQDS composite film exhibits the characteristic of gas diffusion cathode and is highly efficient for hydrogen peroxide electrogeneration with high generation rate and current efficiency. This new electro-Fenton system can degrade amaranth azo dye efficiently in various acidic solutions. The amaranth decay and total organic carbon (TOC) removal were determined as a function of pH, cathode potential, Fe²⁺ and doping AQDS concentrations. Total dye decay and 80.3% mineralization were achieved at the optimum conditions (pH 3.0, E_cath = −0.65 V vs. SCE, 2.0 mM Fe²⁺ concentration). The electrochemical stability and electrocatalytic activity of the composite film after use in electro-Fenton process were also investigated using cyclic voltammetry (CV) and Fourier transfer infrared (FTIR) spectroscopy technologies.     

电芬顿体系中铁铈双金属催化剂降解邻苯二甲酸二丁酯研究

以MCM-41为载体,采用水热-焙烧法制备了Al修饰双金属催化剂Fe-Ce/Al-MCM-41并进行了XRD、BET和FT-IR表征;以水体中的邻苯二甲酸二丁酯(DBP)为处理对象,在铂丝-碳毡电芬顿体系中研究了催化氧化降解DBP的效果和影响因素,探讨了降解机理。结果表明,铁、铈双金属催化剂在电芬顿体系降解邻苯二甲酸二丁酯中具有良好的催化活性,铝离子的加入能够提高催化剂的催化性能;最佳实验条件为pH=3、催化剂投加量0.5 g/L、电流强度I=0.15 A、通氧流量0.2 L/min、反应120 min、初始浓度10 mg/L,此时DBP去除率为97.1%,在酸性或中性条件下去除率稳定在92.1%以上,碱性条件下DBP去除率降低,电流强度和通氧量达到饱和后对DBP降解率影响很小,并且催化剂投加过量会导致催化效果降低。此电芬顿体系中·OH的氧化反应是降解DBP的主要途径。     

光敏电芬顿法处理高盐分硝基苯废水

利用光敏电芬顿法降解高浓度、高盐分的有机废水(以硝基苯为例),考察FeSO4浓度、草酸钾浓度、电流强度、初始pH对硝基苯降解效果的影响。结果表明:采用紫外光光敏电芬顿法处理硝基苯废水时,盐分耐受度高,降解速度快。最佳降解条件为FeSO4浓度4.5 mmol/L,草酸钾浓度3.0 mmol/L,电流强度1.5 A,初始pH为2,处理1.5 h后,硝基苯的去除率可达93%。     

Fenton氧化法在废水处理中的研究进展

阐述了Fenton试剂的氧化机理,在此基础上重点介绍了光Fenton技术、电Fenton技术、超声波Fenton技术在废水处理中的机理与研究现状,展望了未来Fenton氧化技术的发展方向.     

Experimental design methodology applied to electro-Fenton treatment for degradation of herbicide chlortoluron

The degradation of herbicide chlortoluron in aqueous medium by electro-Fenton process using a carbon felt cathode and a platinum anode was studied. The great oxidation ability of this process is due to the large production of hydroxyl radical (OH) by electrochemically induced Fenton's reagent. Hydroxyl radicals are very powerful oxidizing agents which react on organics up to complete mineralization. The influence of some experimental parameters such as initial concentration, current intensity and processing time on the degradation and mineralization rate of chlortoluron by hydroxyl radicals has been investigated. The evolution of chlortoluron concentration with processing time shows a pseudo first order kinetics (k_abs = (4.8 ± 0.2) × 10⁹ mol⁻¹ L s⁻¹). A Doehlert matrix was applied for determination of the optimal working conditions. Optimal parameters for maximum mineralization efficiency (TOC removal ratio of 98%) was achieved after 8 h of treatment using a chlortoluron initial concentration of 0.125 mM and an applied current of 300 mA. The mineralization of aqueous chlortoluron solutions was confirmed by identification of the end-products such as carboxylic acids and inorganic ions. Their evolution during electro-Fenton treatment was studied.