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The feasibility of using guava waste activated carbon (GWAC) for the methylene blue (MB) adsorption has been investigated. The GWAC was prepared using simple thermochemical activation method. The comparison on adsorption performance between GWAC and commercial activated carbon (CAC) were conducted using the batch adsorption study to determine the adsorption capacity for both adsorbents. The adsorption...
A study was conducted on the adsorption kinetics of diuron from aqueous solutions onto activated carbon fiber. The results showed that the formation of hydrogen bonds between diuron and water, and temperature variations may possibly affect the adsorption process. Furthermore, adsorption of diuron onto activated carbon fiber was affected remarkably by solution pH and the maximum adsorption amount was...
Adsorption equilibrium and kinetics of typical acidic and basic dyes, acid red 33 and basic violet 3, onto Semen Euryales Shell Activated Carbon (SESAC) were investigated under varying solution pHs and temperatures. Equilibrium data showed acidic pH was favourable for the adsorption of acid red 33 onto SESAC, while basic pH was favourable for basic violet 3. The adsorption capacity of dye increased...
Based upon fluid dynamics modeling of gas-solids two-phase flows and Euler-Euler two-fluid modeling approach (TFM), incorporated the kinetic model of heterogeneous catalytic reaction, The spouted bed reactor using activated carbon particles to remove SO2 from flue gases was studied. The distribution of SO2 and overall flow patterns including a stable spout region, a fountain region and an annular...
The effects of the presence of water vapor on adsorption of benzene, toluene, acetone and ethyl acetate were studied. Results show that competitive adsorption of water in binary system had depression effect on the adsorption of organic vapors, and the depression effect of humidity on the adsorption capacity of organic vapors increases with an increase in relative humidity and polarity of organic vapors...
The adsorption equilibrium of CO2 was measured on coconut shell activated carbon by using a static volumetric method. Adsorption isotherms over the temperature ranged 308 K ~ 353 K were measured. The results showed that the capacities of adsorption of carbon dioxide on activated carbon at different temperatures were as follows: 308 K > 323 K > 338 K > 353 K. The absorption capacity increases...
The sludge carbon made from sewage sludge with ZnCl2 are used for gatifloxacin adsorption. Characterizing sludge carbon and researching mechanism of gatifloxacin adsorption on different adsorbents. The results showed: sludge carbon have large surface area and mid-hole structure. The adsorption keep to second kinetics model, that means chemical adsorption is the main progress. The research proves sludge...
Coke oven gas is one of by-products generated in the process of dry distillation of coal to form coke. The coke oven gas is of high value in used as not only energy but also chemical material, but it contains hydrogen sulfide (H2S) gas which limits its application. Thus, it is necessary to remove H2S from the coke oven gas in order to use it as energy or chemical material. The thermodynamic analysis...
Perfluorooctane sulfonate (PFOS) has increasingly attracted global concerns in recent years and has also been proposed as the candidates of persistent organic pollutants due to their world-wide distribution, environmental persistence and bioaccumulation potential. The adsorption mechanism of PFOS from aqueous solutions onto granular activated carbon (GAC) was investigated. The adsorption reaction...
Over the past several decades, trace heavy metal ion pollution, such as Cd(II), Cu(II), Pd(IV), etc., have attracted much attention because of their virulent and hard degradation properties. Recently, great efforts have been devoted to establish new methods and technologies to removal toxic metals. Among them, activated carbon adsorption, especially the modified activated carbon technology has been...
The regular methods for nickel removal such as activated carbon adsorption are always complicated in process and expensive in construction and maintenance. In this research coal fly ash, usually taken as industrial waste, was synthesized into particle filter material, and then the latter was used as absorbent for nickel removal from aqueous water. The physical and chemical properties of this material...
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