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M. Ghaedi,D. Elhamifar,M. Roosta,R. Moshkelgosha 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
The efficiency of an ionic liquid based periodic mesoporous organosilica (PMO-IL) in the removal of sunset yellow from aqueous solutions using ultrasonic assisted adsorption method was investigated. The PMO-IL was first characterized by nitrogen sorption and TEM techniques. The optimized conditions (0.013 g of adsorbent, 32 mg L 1 of sunset yellow at 2 min of sonication time and pH 7) were obtained by central composite design (CCD). Fitting the equilibrium data show the suitability of the Langmuir model with second-order equation to control the kinetic of the adsorption process and good reusability (5 cycles) of PMO-IL for adsorption of dye.
M. Ghaedi,M. Montazerozohori,M. Sajedi,M. Roosta,M. Nickoosiar Jahromi,A. Asghari 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
In the present study, the efficiency and usability of two sorbents including silver nanoparticles loaded on activated carbon and homemade activated carbon for removal and recoveries of heavy metal ions by solid-phase extractant were investigated. These materials characterization was carried out using different techniques such as SEM, XRD, BET and UV–vis. The analytes such as Zn2+, Cu2+ and Pb2+ ions was enriched onto sorbent and subsequent eluted and determined by flame atomic absorption spectroscopy. The influences of the analytical parameters including pH, type and condition of eluent, adsorption capacities and amount of adsorbent, condition of eluent and sample volume on the metal ions recoveries were optimized. The optimum pH value for the separation of metal ions on these new sorbents was 4. The adsorbed metal ions could be completely eluted by using 10.0 mL 4.0 mol L1 HNO3 solution. The loading of 30 mg of ligand onto 0.6 and 0.1 g of AC and Ag-NP-AC, respectively, make possible quantitative sorption of analytes. The accurate and easy determination of analytes in the presence of high limit of matrices constituent is possible without generation of significant problems. The applicability and accuracy of method were tested by its application for analytes quantification in complicated matrices with recoveries more than 91% and relative standard deviation lower than 5%.
M. Ghaedi,A.M. Ghaedi,F. Abdi,M. Roosta,R. Sahraei,A. Daneshfar 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3
In this study a green approach described for the synthesis of copper sulfide nanoparticles loaded onactivated carbon (CuS-NP-AC) and usability of it for the removal of reactive orange 12 (RO-12). Thismaterial was characterized using instruments such as scanning electron microscopy (SEM) and X-raydiffraction (XRD). The effects of variables were optimized using Principal component analysis-artificialneural network (PCA-ANN). Fitting the experimental equilibrium data shows the suitability of theLangmuir isotherm. The small amount of proposed adsorbent (0.017 g) is applicable for successfulremoval of RO-12 (RE > 95%) in short time (31.09 min) with high adsorption capacity (96.9 mg g-1)
M. Roosta,M. Ghaedi,A. Daneshfar,R. Sahraei,A. Asghari 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
A novel ultrasound assisted adsorption protocol for the removal of erythrosine from aqueous solution bytin sulfide nanoparticle loaded on activated carbon (SnS-NP-AC) has been described. The main andinteraction of variables (pH, sonication time, adsorbent dosage and initial dyes concentrations) on theremoval of erythrosine were studied and optimized by a central composite design (CCD) combined withresponse surface methodology (RSM). The small amount of proposed adsorbent (0.02 g) is applicable forremoval of high content of erythrosine with high removal percentage (>98%) in short time (4.5 min). Application of ultrasound led to remarkable decrease in adsorption time.