The Analysis of Activated Carbon Regeneration Technologies

经验交流The Analysis of Activated Carbon Regeneration Technologies兆芳( 450001郑州大学河南郑州)Abstract: A series of methods for activated carbonregeneration process. The process is considered the self- -destructionregeneration were briefly introduced. Such as thermalregeneration，chemical regeneration, biochemicalenzyme will flow out and be absorbed, then form enzymatic center onregeneration, and newly supercritical fluid regeneration,the charcoal to promote the decomposition of pollutants. This methodelectrochemical regeneration, light-catalyzed is adaptable to removal of organics and ofers advantages of simplerregeneration，and microwave rad iation method, and theequipment, while the speed is slow, time is long, efficiency is affecteddeveloping trend of activated carbon regeneration was by factors easily, such as temperature and water quality.predicted.Catalytic wet oxidation regenerationKey words: activated carbon; regeneration technology;Catalytic wet oxidation can decompose liquid organics on themechanism of regenerationactivated carbon into micro-molecules by oxygen or air, under thehigh temperature and pressure condition. High efficient catalyst isIntroductionintroduced to improve the condition and oxidative efciency.It' swidely used owing to reaction time shortly, stable efficiency and noenormous specifie surface area, is a kind of avirulent and flavourless additional heating, but suffers from greater poisonous middle productadsorbent, which can effectively remove deliquescent organics withunless proper catalyst is adopted.low concentration in sewage and wastewater. At present, the methodElectrochemical regenerationof activated carbon adsorption has become an efective means in theElectrochemical regeneration is a technology in which activatedadvanced treatment of urban sewage and industrial waste water, also in thecarbon is filled between two main electrodes. Most pollutantspolluted water purification. However, the application of activated carbon is adsorbing on the carbon are decomposed and least are separated by thelimited because of its high price, rarely production resources and secondaryelectrophoretic force, with oxidation-reduction reaction of polarizablepollution, which makes it necessary to recycle and regenerate activatedactivated carbon when electrolyte is added DC electric field. Plentycarbon for reasonable economic benefit. Activated carbon regeneration isof advantages, such as easy to operate, high eficiency, low energythat disposes and recovers carbon to achieve reuse, that is inactivated after consumption and avoiding secondary pollution lead it promising.saturated adsorption, by physical, chemical and biological methods, suchOther regeneration methodsas thermal regeneration, chemical regeneratin, biochemical regeneration,The principle objective of activated carbon regeneration isto remove the adsorbate and recover its adsorption performance.Activated carbon regeneration methodActivated carbon regeneration method is diverse due to different kindsand properties of adsorbate. Except for the above methods, some otherThermal regeneration is the most common method of activated methods ,including photocatalytic, microwave radiation ,ultrasonic etc,carbon. It can carbonize and decompose the organic under the high have achieved development and been applied in practice.temperature, which is adsorbed by activated carbon and transgress as aConclusiongas. Meanwhile, this method can make carbon generate new microporesActivated carbon regeneration is necessary for its uniqueactivation of charcoal. Thermal regeneration has the advantages of high economy of regeneration have been a major constraint on its extensiveefficiency and short reaction time, but it may cause charcoal losing, use in environment engineering field. Therefore, economic eficiencyhigh operation cost and carbon cohering.is one of the keys to make the better use of this technology. In addition,Chemical regenerationit should be considered to guarantee carbon regenerative performance,activated carbon by changing the reaction conditions, such as regeneration.temperature, solvent, PH, breaking the equilibrium among solvent, References:activated carbon and adsorbate, which can be classified into two [1] Libe Yingli, Abe YuFu. The application of activated carboncategories - Inorganic chemical regeneration and organic solvent technology[M]. Gao Shangyu, Yi Bian. Nanjing: southeast universityloss of activated carbon effectively, can reclaim the useful substances [2] Furuya E, Sato K, Kataoka T, et al. Amount of aromatic compoundsin the recycling liquid. But insufficient regeneration can cause adsorbed on inorganic dsortbents[], Separation and Purificationmicroporous blockage easily, with adsorption performance obviously Technology, 2004,39(1-2):73-78.decreasing after being repeatedly regenerated. It' s indicated that [3] Sun Kang, Jiang Jianchun. The research of Citric acid chemicalcombining oxidant decomposition, a kind of chemical regenerationmethod with granula artivated 1中国煤化工method, with acid-bas regeneration, can reach better.Forest Products. 2005Biochemical regeneration[4] Qin Yuchun,HC N M H Ge. ActivatedMicroorganisms are used to oxidate and decompose organiccarbon regenerdUu小Jourual of carbonpollutants absorbed on the surface of activated carbon in biochemicaltechnology ,200,117(6):29-31.-281-