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Spontaneous isotopic exchange of oxygen atoms between dry powdered Ti16O2 oxygen containing minerals and gaseous C18O2 was studied using gas phase high-resolution Fourier transform infrared absorption spectroscopy of carbon dioxide isotopologues. The absorption rovibrational spectra of all the measured carbon dioxide isotopologues were assigned and used for the quantification of the time-dependent...
The wastewater containing alcohol ethoxylates (AEs) from the processing of Orimulsion was treated by ozonation with the presence of activated carbon (AC) in a laboratory-scale reactor. Effect of some operating parameters, such as the AC amount, initial pH, and the ozonized-air flowrate, on the COD removal were investigated. The results show that the application of catalytic ozonation of AC can significantly...
A method for control of mercury emissions from combustion processes involves removal of elemental mercury from the flue gas by injection of activated carbon. The adsorption and stability of mercury was determined on a commercial activated carbon and two activated carbons that were impregnated with bromine and chlorine. The results of the adsorption experiments show Hg sorption capacities of bromine...
The low-cost activated carbon was prepared from sugarcane bagasse, an agricultural waste material, by chemical activation with different reagents. Orthogonal experimental design was applied to study the influence of activation temperature, activation time and chemical ratio of reagents to sugarcane bagasse on the chemical activation process of sugarcane bagasse. The optimal activated carbon was obtained...
A number of activated carbons had been produced from waste tires by pyrolysis and water activation methods, and they had been modified by sulfur steam at high temperature. Produced sulfur-impregnated activated carbons were examined for their mercuric chloride adsorptive ability by thermal gravimetric analysis. The experiment data show that sulfur should be evenly distributed in the activated carbon...
Experiments on adsorption for phosphorus by activated carbon, zeolite and ceramisite were conducted. The results show that adsorption capacity order of three filter media from high to low is activated carbon, zeolite and ceramisite. Influential factors which affect the adsorption capacity were surveyed. According to the analysis, the first factor is that surface isoelectric point pH of activated carbon...
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...
This research took granular activated carbon and resin as adsorbent separately, adopting pressure swing adsorption to purify gas containing low concentration toluene. Results from this trial show: NDA-150 resin has the optimum effect of adsorption for air containing toluene. The optimum adsorption rates of resin and activated carbon are 92.3% and 83.5% separately, and the optimum adsorption flux of...
The feasibility of powdered activated carbon (PAC) as an adsorbent to eliminate the perfluorooctanoic acid (PFOA) in the water for reuse has been studied. PAC exhibits a high affinity to adsorb PFOA on its surface. More than 95% of PFOA can be adsorbed onto PAC surface at the first hour. For common reuse water, the most optical PAC concentration was 0.125 g/L. As illustrated by IR spectra, PAC is...
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