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The efficiency of a functionalized Disordered Mesoporous Silica-1 (DMS-1) to remove mercury ions disperse in water was evaluated. This material was functionalized using 3-mercaptopropyltrimethoxisilan as the source of thiol groups using the post-synthesis method. The aforementioned sorbent system was characterized using N2 adsorption-desorption isotherms, Fourier Transform Infrared spectrometry (FTIR),...
The removal of ammonia from aqueous solutions using zeolites (ZFAs) synthesized from coal fly ash (CFA) as low-cost absorbent was investigated in a batch mode. When raw CFA was subjected to alkaline hydrothermal zeolite synthesis, the Zeolite X (ZFA-X) and zeolite A (ZFA-A) were formed. ZFAs had a much greater ability than CFA to remove ammonia. The pH strongly influenced ammonia removal by ZFAs....
Removal of Cu2+, Cd2+, Pb2+ and Zn2+ in wastewater was investigated using steel slag as a treatment material, and then mechanism of removal was discussed according to main crystalline phases in steel slag and Zeta potential of steel slag. The results showed the steel slag was a very suitable multi-functional material for the treatment of wastewater containing Zn2+, Cu2+, Cd2+ and Pb2+. Under treatment...
The effect of solution temperature and the determination of the kinetic parameters of methylene blue (MB) adsorption onto cereal chaff were performed to understand the adsorption mechanism. The pseudo-second order kinetic model was fitted to the experimental data and found it was good to predict the adsorption behavior using nonlinear regressive method, suggesting that the mechanism may be a chemisorption...
The thermodynamics characteristics of Cr (VI) adsorption, the effects of pH, concentration and contact time and the adsorption isotherm line at different temperature from aqueous solution with solphonated lignite under static conditions were studied. The results showed that the Langmuir isotherm equation well described experiment data in dilute solution because fitting correlation coefficients were...
Natural zeolites cropped out from Pâglisa (Romania) (P), were evaluated in the process of iron removal from model solutions. Experimental data were evaluated using linear and non-linear regression analysis. A comparison analysis between the two regression methods for estimating the isotherm parameters was made. Experimental data were fitted to Langmuir, Freundlich, and Redlich-Peterson isotherm equations...
Calcined layered double hydroxides particles were used as adsorbent to remove fluoride ions. Batch adsorption studies were conducted under various equilibrating conditions. The results show that the HTlc calcined at 500??C had the highest capacity of removal of fluoride ions, after adsorption it regenerated to its original layered structure, it is called "memory effect". In field water studies,...
With the rapid development of industry and agriculture, there are thousands of tons phosphate and nitrogen releasing into surface water. Phosphate becomes the main reason for eutrophication, resulting in deterioration of water quality. Ferric sludge from drinking waterworks was found to possess potential efficiency to remove phosphate ions from aqueous solutions. The maximum phosphate ions adsorption...
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