电化学法再生颗粒活性炭的研究现状

阐述了电化学再生技术的再生机理,并重点介绍了电流密度、再生时间、电解质、电解质质量浓度、酸碱度和再生位置对GAC再生效率的影响,以及电化学法再生GAC的反应器.最后,讨论了电化学再生方法的发展趋势,指出了优化机理、开发其他基于电的技术、探讨电化学和其他工艺相结合的技术是电化学法再生颗粒活性炭的未来研究工作重点.     

活性碳吸附技术与电化学结合研究进展

活性炭吸附技术在环境保护方面应用广泛,为提高活性炭的吸附性能和再生效果,将活性碳吸附技术与电化学相结合,最终实现电化学极化活性炭吸附与电化学再生一体化循环吸附工艺,从而降低活性炭吸附操作成本。文章总结了这二者结合的两方面研究前沿,其一电化学极化活性炭吸附技术;其二电化学再生活性炭技术,揭示出电极化吸附与电化学再生一体化循环的低成本活性炭吸附工艺的优势和发展方向。     

活性炭吸附膜浓水再生方法的比较

研究了活性炭吸附膜浓水的穿透曲线,并针对吸附饱和的活性炭,考察了超声再生、热再生、化学再生、电化学再生4种常用再生方式的再生效率和再生次数。结果表明电化学再生具有相对较高的再生效率和相对稳定的再生效果,其最高再生效率为87.5%,采用该方法进行4次再生后效率仍有60%。     

活性炭的再生方法

介绍了几种废活性炭的再生方法,其中主要有电化学再生法、超临界萃取再生法、微波辐射再生法、并对影响活性炭再生效率的因素进行了研究探讨。     

煤质与木质活性炭吸附处理焦化RO浓水及再生试验研究

以某钢铁厂焦化RO浓水为研究对象,采用煤质颗粒活性炭与木质颗粒活性炭进行吸附处理,考察了活性炭投加量、 pH值、吸附时间对吸附效果的影响,同时进行2种活性炭的Freundlich吸附等温线研究,研究了再生温度、再生时间、再生次数对活性炭再生后吸附性能及再生损失的影响。结果表明,在最佳吸附条件下,煤质和木质活性炭对废水中COD的去除率分别为61.1%、 56.3%。最佳再生温度为500℃,煤质和木质活性炭最佳再生时间分别为1.5 h和1.0 h。多次再生试验证明,煤质活性炭可进行大于6次的再生,使用寿命优于木质活性炭。     

电化学高级氧化技术再生活性炭研究进展

传统电化学技术再生吸附饱和活性炭具有再生效率高、活性炭无质量损失的优点,但其存在着矿化效率低、生成毒理性副产物、能耗高等缺陷。电化学高级氧化（E-AOP）再生技术能有效克服传统电化学再生存在的问题。简述了传统电化学再生活性炭再生效能及机理,分析了操作参数（电流、电解质种类及浓度、再生位置、阳极材料等）对解吸-吸附平衡和污染物矿化效能的影响。总结了3类E-AOP再生技术（电Fenton再生技术、电活化臭氧再生技术、电活化过硫酸盐再生技术）在活性炭再生过程中的作用机制与应用。电Fenton再生技术再生效果较优,通过新型方式再生可有效克服体系内金属离子污染的问题;电活化臭氧活性炭再生技术无需添加任何化学品及催化剂,有利于控制反应条件及实现再生过程自动化;电活化过硫酸盐再生活性炭技术操作便捷、能耗较低,具有广泛的适用性。最后,提出了E-AOP再生技术存在的问题及发展前景,以期为开发一种新型高效环保的活性炭再生技术提供理论依据。     

活性炭材料电化学再生的研究进展

活性炭(AC)作为高效的吸附材料,被广泛应用于废水处理,因此活性炭的有效再生具有极为重要的工业与经济价值。电化学工艺相比其他传统再生方法具有再生效率高、能耗低、炭损失小、可原位再生等优点,是十分具有潜力的再生方法。主要综述了采用电化学方法再生活性炭材料的研究进展,介绍了电化学再生中解吸与降解的机理,并从反应器结构、电极材料、电解质类型及操作参数的角度,分析了影响电化学再生的因素,指出了电化学与其他工艺联用的可行性与工业应用的局限性,最后总结了电化学再生技术应该从规模化、经济化、有效化的方向进行发展。     

超声波催化活性炭再生研究进展

活性炭因吸附性能优良而被广泛应用于给水和污水处理中。但饱和活性炭的再生已成为水处理领域新的难题。本文重点介绍了超声波再生饱和活性炭的作用机理；分析了影响超声波再生活性炭效果的主要因素；综述了超声波与双氧水、光催化、微波、臭氧、熔融草酸、溶剂、电化学等技术相耦合再生饱和活性炭的相关研究进展，并对超声波组合技术再生活性炭的未来做出了展望。     

活性炭的活性再生技术进展

主要介绍了活性炭的应用及活性再生方法。活性炭广泛用于化工、医药、环保、航天、农药、废水处理等诸多领域中,在研究及生产中起到了非常重要的作用。活性炭的活性再生方法主要有传统的热再生法、生物再生法、溶剂再生法,及新兴的超临界流体再生法、电化学再生法、光催化再生法和微波辐射加热法等。微波辐射再生法作为一种高效、节能、省时的再生技术,具有巨大的发展潜力和优势。     

电化学再生活性炭的工艺参数研究

对所选定的活性炭，吸附苯酚饱和后者电化学再生。在室温条件下，选择４因素、２水平的正交试验方法进行了相关试验。结果表明，再生位置是活性炭再生工艺中最重要的影响因素，电解质ＮａＣｌ浓度是较重要的影响因素，再生电流和再生时间对活性炭的电化学再生有一定的影响。     

Regeneration of exhausted activated carbon by electrochemical method

The regeneration of coconut shell activated carbon contaminated with phenol was systematically investigated by electrochemical method under different operating conditions. The effects of several operating parameters on the electrochemical regeneration efficiency were measured at room temperature. The experimental results show that the electrochemical method can be used to regenerate the activated carbon exhausted with phenol. The electrochemical regeneration efficiency depends on several operating variables such as electrolyte concentration, regeneration current intensity and regeneration time. The residual phenol concentration in solution was much lower and the regeneration efficiency can reach 85.2% in a stirred electrochemical reactor after regeneration for 5 h.     

Regeneration of phenol‐saturated activated carbon in an electrochemical reactor

The regeneration of phenol‐saturated activated carbon in an electrochemical reactor was investigated in order to develop a novel regeneration method of activated carbon. The regeneration of spent activated carbon saturated with phenol was conducted in a stirred electrochemical reactor under different operating conditions. The influences of operating parameters, such as regeneration current intensity and time, on regeneration efficiency were systematically investigated. The regeneration efficiency can reach over 80% under continuous stirring in the reactor, and it only decreases by less than 5% after four regeneration cycles. Electrochemical regeneration in the stirred electrochemical reactor is shown to be an effective method for the regeneration of phenol‐saturated activated carbon with a much higher regeneration efficiency compared with a process using NaOH solution. © 2002 Society of Chemical Industry     

活性炭的电化学再生技术研究

本文在测定了苯酚于椰壳活性炭上的吸附平衡和添加2％NaCl对吸附平衡的影响基础上,对用苯酚吸附饱和后的活性炭在一个搅拌槽电化学反应器中进行了再行试验研究。在室温条件下,通过改变再生电流的大小,在不同的时间间隔内,测定了反应器中溶液的残余酚深度与活性炭的再生效率随再生时间和再生电流大小的变化关系。     

Electrochemical Regeneration of Activated Carbon Saturated with Toluene

The electrochemical regeneration of an activated carbon, previously saturated with toluene by gas phase adsorption, was studied. Cathodic and anodic regeneration methods were analyzed using a small batch electrochemical cell. In both cases, a stripping efficiency close to 100% was obtained under appropriate conditions of potential, current, and time of electrolysis. Successive loading and regeneration cycles of the activated carbon were performed under cathodic conditions without loss of the adsorption properties of the activated carbon, thus achieving a high regeneration efficiency (close to 99%). This electrochemical method is very effective for regeneration of activated carbon compared to conventional thermal regeneration as it does not modify the porous texture of the material.     

活性炭再生技术研究进展

系统介绍了目前世界范围内的主要活性炭再生方法：热再生、化学药品再生、生物再生,以及新兴的超临界流体再生法、电化学再生法、光催化再生法和微波辐射加热法等,并预测了活性炭再生技术未来的发展方向。     

活性炭再生技术研究进展

系统介绍了目前世界范围内的主要活性炭再生方法:热再生、化学药品再生、生物再生,以及新兴的超临界流体再生法、电化学再生法、光催化再生法和微波辐射加热法等,并预测了活性炭再生技术未来的发展方向。     

活性炭再生方法的分析和比较

活性炭是一种性能优良的的吸附剂,其原材料有不同形式的来源。重点介绍了活性炭的几种再生方法:热再生法、溶剂再生法、生物再生法、催化湿式氧化法、电化学再生法等。对再生方法的原理和过程进行了阐述。对各种再生方法在再生效率、炭损率、再生重复性、能耗等方面作了相关比较,以此作为评价各种再生方法优劣的依据。     

活性炭再生方法及工艺设备的研究进展

介绍了近年来国内外活性炭再生的主要方法:加热再生法、化学药剂再生法、生物再生法、湿式催化氧化再生法、微波辐射再生法、电化学再生法等,并对加热再生的设备做了比较分析。     

Electrochemical regeneration of activated carbon loaded with p-nitrophenol in a fluidized electrochemical reactor

This paper described a novel electrochemical process for the regeneration of activated carbon (AC) loaded with p-nitrophenol (PNP), aiming to reduce regeneration time and improve cost-effectiveness of the process by adoption of a novel non-active anode of modified lead dioxide and operation of AC in a fluidized mode. The regeneration parameters such as current density, liquid flow rate, NaCl concentration, pH of the solution and regeneration time were systematically investigated. Under the optimum conditions, the regeneration efficiency of AC could reach 90% in 1.5 h, and no significant declination was observed after five-times continuous adsorption-regeneration cycles, confirming the reuse feasibility of the regenerated AC. The adsorption of organic pollutants was confirmed occurring in the micropore of AC, and AC regeneration was mainly due to the decomposition of organics by the attack of active species such as hydroxyl radical that were generated by electrochemical oxidation. The time-space production for AC regeneration has been greatly improved in the present modified process, indicating this regeneration process is much more potentially cost-effective for application.