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Journal of Environmental Sciences 2007年第6期19卷 674-677页

作者： Md.Zahangir ALAM Suleyman A.MUYIBI Juria TORAMAE Bioenvironmental Engineering Research Unit Department of Biotechnology EngineeringFaculty of EngineeringInternational Islamic UniversityMalaysia Jalan Gombak53100 Kuala LumpurMalaysia

The adsorption capacity of activated carbon produced from oil palm empty fruit bunches through removal of 2,4-dichlorophenol from aqueous solution was carried out in the laboratory. The activated carbon was produced by thermal activation of activation time with 30 min at 800℃. The adsorption process conditions were determined with the statistical optimization followed by central composite design. A developed polynomial model for operating conditions of adsorption process indicated that the optimum conditions for maximum adsorption of phenolic compound were： agitation rate of 100 r/min, contact time of 8 h, initial adsorbate concentration of 250 mg/L and pH 4. Adsorption isotherms were conducted to evaluate biosorption process. Langmuir isotherm was more favorable （R^2=0.93） for removal of 2,4-dichlorophenol by the activated carbon rather than Freundlich isotherm （R^2=0.88）.

关键词： activated carbon adsorption oil palm empty fruit bunches 2,4-dichlorophenol

Extended XG Equation for the Prediction of Adsorption Equilibrium of Vapor Mixture on activated carbon

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Chinese Journal of Chemical Engineering 2003年第4期11卷 395-398页

作者：谢自立郭坤敏吴菊芳袁存乔 Research Institute of Chemical Defense Beijing 100083 China

The XG equation, which is developed by us previously for describing the adsorption equilibrium of pure vapor on activated carbon, is extended to multi-component system. Verified by experimental data, the extended XG equation was found to be more successful in predicting the adsorption equilibrium of vapor mixture on activated carbon than the extended Langmuir equation, the extended BET equation and the ideal adsorbed solution theory (IAST).

关键词： adsorption vapor mixture activated carbon

Preparation of Microporous activated carbon from Raw Coconut Shell by Two-step Procedure

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Chinese Journal of Chemical Engineering 2006年第2期14卷 266-269页

作者：苏伟周理周亚平 Chemical Engineering Research Center School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Department of Chemistry School of Science Tianjin University Tianjin 300072 China

A novel two-step procedure was used to manufacture microporous activated carbon from raw coconut shell. In this process, the raw coconut shell was （1） heated in an inert environment to temperatures between 450℃ and 850℃, and reacted with oxygen （ PO2=1.1-5.3kPa） for some time, and （2） heated again in inert environment to activation temperature（850℃） to produce an activated carbon. activated carbons with specific surface area greater than 700m^2.g^-1 were manufactured with a yield between 24% and 28%. It was shown that the carbon had a narrow distribution of pore size, possibly less than lnm, which was calculated by a simple method based on local density function theory.

关键词： activated carbon oxygenation pore size distribution microporosity

Photocatalytic degradation of L- acid by TiO_2 supported on the activated carbon

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Journal of Environmental Sciences 2006年第3期18卷 562-566页

作者： WANG Yu-ping WANG Lian-jun PENG Pan-ying School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094China School of Chemistry and Environmental Science Nanjing Normal University Nanjing 210097 China

TiO2 sol was prepared by sol-gel technique with tetrabutyl titanate as precursor. Supported TiO2 catalysts on activated carbon were prepared by soak and sintering method. The aggregation of nano-TiO2 particles can be effectively suppressed by added polyethylene glycol （PEG） as a surface modifier. The average particle diameter of TiO2, specific surface area and absorbability of catalyst can be modified. Based on characteristics of the TiO2 photocatalyst with XRD, specific surface area, adsorption valves of methylene blue and the amount of TiO2 supported on the activated carbon, the photocatalytic degradation of L-acid was studied. The effect of the factors, such as pH of the solution, the initial concentration of L-acid on the photocatalytic degradation of L-acid, were studied also. It was found that when the pH of the solution is 1.95, the amount of photocatalyst is 0.5 g, the concentration of the L-acid solution is 1.34×10^3 mol/L and the illumination time is 7 h, the photocatalytic degradation efficiency of L-acid can reach 89,88%, The catalyst was reused 6 times and its degradation efficiency hardly changed.

关键词： L-acid activated carbon supported TiO2 photodegradation

Preparation and performance of photocatalytic regenerationable activated carbon prepared via sol-gel TiO_2

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Journal of Environmental Sciences 2006年第3期18卷 557-561页

作者： LIU Shou-xin SUN Cheng-lin College of Material Science and Engineering Northeast Forestry University Harbin 150040 China Dalian Institute of Chemical Physics The Chinese Academy of Sciences Dalian 116023 China

Preparation of photocatalytic regenerationable activated carbon （AC） is the key step for the practical application of in situ regeneration of exhausted AC. A novel photocatalytic regenerationable AC was prepared by sol-gel TiO2 in this work. The adsorption and regeneration performance of TiO2/AC were evaluated using phenol as model compound. Scanning electron microscope （SEM） and nitrogen （77 K） adsorption isotherm were used to determine the surface area, pore structure and the distribution of TiO2. The results showed that with the increase of TiO2 loading, adsorption capacity of TiO2/AC decreased and the regeneration efficiency increased. The photocatalytic regenerationable AC with suitable TiO2 loading （2 wt%） exhibited suitable adsorption capacity and regeneration efficiency. TiO2 located mainly in the entrance of macro-pore of carbon. The prepared TiO2/AC exhibited similar surface structure and pore structure with material carbon.

关键词： photocatalytic regenerationable activated carbon titanium dioxide

Platinum recovery from dilute platinum solutions using activated carbon

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Transactions of Nonferrous Metals Society of China 2011年第11期21卷 2554-2558页

作者： S. AKTAS M. H. MORCALI Institute of Science and Technology Istanbul Technical University Faculty of Chemistry and Metallurgy Istanbul Technical University

Platinum adsorption on activated carbon,a common adsorbent,from dilute platinum-containing solution of 57.6 mg/L was *** effects of different adsorption parameters on the platinum adsorption were reported in *** percentage of platinum adsorption increased with increasing the amount of adsorbent,as well as with increasing contact time and temperature.A platinum adsorption of 75% was obtained using 400 mg of activated carbon at a shaking rate of 200 r/min for 3 h at 25 ℃.A platinum adsorption of 88%,however,was obtained at 80 ℃ using 200 mg of activated carbon within only 1 h,which indicates that temperature plays a vital role in the adsorption process.A platinum adsorption of 99% or above was attained using 400 mg of activated carbon after contact for 3 h at 80 ℃.

关键词： platinum adsorption activated carbon recovery

Catalytic Effect of activated carbon and activated carbon Fiber in Non-Equilibrium Plasma-Based Water Treatment

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Plasma Science and Technology 2008年第3期10卷 358-362页

作者：张延宗郑经堂曲险峰于维钊陈宏刚 State Key Laboratory of Heavy Oil Processing China University of PetroleumDongying 257061 China

Catalysis and regeneration efficiency of granular activated carbon （GAC） and activated carbon fiber （ACF） were investigated in a non-equilibrium plasma water treatment reactor with a combination of pulsed streamer discharge and GAC or ACF. The experimental results show that the degradation efficiency of methyl orange （MO） by the combined treatment can increase 22% （for GAC） and 24% （for ACF） respectively compared to pulsed discharge treatment alone, indicating that the combined treatment has a synergetic effect. The MO degradation efficiency by the combined treatment with pulsed discharge and saturated GAC or ACF can increase 12% and 17% respectively compared to pulsed discharge treatment alone. Both GAC and ACF show catalysis and the catalysis of ACF is prominent. Meanwhile, the regeneration of GAC and ACF are realized in this process. When H202 is introduced into the system, the utilization efficiency of ozone and ultraviolet light is improved and the regeneration efficiency of GAC and ACF is also increased.

关键词： non-equilibrium plasma water treatment activated carbon activated carbon fiber catalytic effect

Science Letters:Nitrogen doping of activated carbon loading Fe_2O_3 and activity in carbon-nitric oxide reaction

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第5期8卷 707-711页

作者： WAN Xian-kai ZOU Xue-quan SHI Hui-xiang WANG Da-hui Institute of Environmental Engineering Zhejiang University Hangzhou 310027 China

Nitrogen doping of activated carbon loading Fe2O3 was performed by annealing in ammonia, and the activity of the modified carbon for NO reduction was studied in the presence of oxygen. Results show that Fe2O3 enhances the amount of surface oxygen complexes and facilitates nitrogen incorporation in the carbon, especially in the form of pyridinic nitrogen. The modified carbon shows excellent activity for NO reduction in the low temperature regime （〈500℃） because of the cooperative effect of Fe2O3 and the surface nitrogen species.

关键词： activated carbon Nitric oxide Doping Iron oxides Catalytic reduction

Catalytic decomposition of low level ozone with gold nanoparticles supported on activated carbon

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Frontiers of Environmental Science & Engineering 2009年第3期3卷 281-288页

作者： Pengyi ZHANG Bo ZHANG Rui SHI Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China

Highly dispersed gold nanoparticles were supported on coal-based activated carbon(AC)by a sol immobilization method and were used to investigate their catalytic activity for low-level ozone decomposition at ambient *** adsorption-desorption,scanning electron microscope(SEM),and X-ray photoelectron spectroscopy(XPS)were used to characterize the catalysts before and after ozone *** results showed that the supported gold nanoparticles prepared with microwave heating were much smaller and more uniformly dispersed on the activated carbon than those prepared with traditional conduction heating,exhibiting higher catalytic activity for ozone *** pH values of gold precursor solution significantly influenced the catalytic activity of supported gold for ozone decomposition,and the best pH value was *** the case of space velocity of 120000 h–1,inlet ozone concentration of 50 mg/m3,and relative humidity of 45%,the Au/AC catalyst maintained the ozone removal ratio at 90.7%after 2500 *** being used for ozone decomposition,the surface carbon of the catalyst was partly oxidized and the oxygen content increased accordingly,while its specific surface area and pore volume only decreased a *** was mainly catalytically decomposed by the gold nanoparticles supported on the activated carbon.

关键词： ozone decomposition activated carbon gold nanoparticles catalysis sodium citrate microwave

Determination of Copper by Flame Atomic Absorption Spectrometry after Preconcentration with activated carbon Impregnated with a New Schiff Base

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Chinese Journal of Chemistry 2005年第10期23卷 1437-1442页

作者： SABER TEHRANI, Mohammad RASTEGAR, Faramarz PARCHEHBAF, Ayob REZVANI, Zolfaghar Department of Chemistry Faculty of Science Science and Research Campus lslamic Azad University Tehran Iran Plate-Form Analitique lnorganique Lois Pasteur University Strasburg France Department of Chemistry Faculty of Science Azarbaijan Tarbiat Moallem University Tabriz Iran

A simple and reliable method for the extraction and determination of trace amounts of copper（Ⅱ） ions using activated carbon （AC） impregnated by a new Schiff base 5-[（4-heptyloxyphenyl）azo]-N-（4-propyloxyphenyl）-salicylaldimine （HPPS） and atomic absorption spectrometry is presented. Recovery efficiency and the influence of pH value, volume of sample solution, effect of different eluents, and interfering ions were evaluated. The limit of detection （3σ） was 2.62 ***^-1 and the relative standard deviation （n=10） was 1.5%. Under optimum conditions, the copper ions were concentrated 25 fold using 250 mL of sample solution and 10 mL of eluent. This procedure has been successfully applied to the determination of copper in different water samples.

关键词： preconcentration determination copper flame atomic absorption spectrometry activated carbon