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Aydin Hassani,Reza Darvishi Cheshmeh Soltani,Semra Karaca,Alireza Khataee 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
In the present work, adsorption of basic red 46 (BR46) by nano-sized montmorillonite (MMT)/calciumalginate (CA) composite was optimized using central composite design. The maximum dye removal of85.07% was obtained at an initial dye concentration of 30 mg L 1, adsorbent dosage of 2 g L 1, contacttime of 60 min and temperature of 25 8C. The adsorption capacity decreased with decreasing both initialpH and mixing speed. The pseudo-second order kinetic model had the highest correlation coefficient(R2 = 1.00). Based on the Langmuir isotherm model, the maximum adsorption capacity of MMT/CA wasabout 35 mg g 1.
Alireza Khataee,Aydin Hassani,Reza Darvishi Cheshmeh Soltani,Murat Kıranşan,Semra Karaca,Canan Karaca 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.1
The removal of two anionic dyes, C.I. Acid Orange 7 (AO7) and C.I. Acid Red 17 (AR17), by ultrasoundassisted adsorption on the modified nanoclay in aqueous solutions was studied. The modified nanoclay was characterized by SEM/EDX, BET, XRD and FT-IR techniques. The average crystal size for the interlayer spacing of the modified nanoclay was about 14.3 nm. Central composite design (CCD) was used for the optimization of the operational parameters, including the initial dye concentration, sonication time, adsorbent dosage and temperature. The results demonstrated a good agreement between the predicted values obtained by the model and the experimental values for both AO7 (R2= 0.959) and AR17 (R2=0.971).
Response surface analysis of removal of a textile dye by a Turkish coal powder
Khataee, Alireza,Alidokht, Leila,Hassani, Aydin,Karaca, Semra Techno-Press 2013 Advances in environmental research Vol.2 No.4
In the present study, an experimental design methodology was used to optimize the adsorptive removal of Basic Yellow 13 (BY13) using Turkish coal powder. A central composite design (CCD) consisting of 31 experiments was employed to evaluate the simple and combined effects of the four independent variables, initial dye concentration (mg/L), adsorbent dosage (g/L), temperature ($^{\circ}C$) and contact time (min) on the color removal (CR) efficiency (%) and optimizing the process response. Analysis of variance (ANOVA) showed a high coefficient of determination value ($R^2=0.947$) and satisfactory prediction of the polynomial regression model was derived. Results indicated that the CR efficiency was not significantly affected by temperature in the range of $12-60^{\circ}C$. While all other variables significantly influenced response. The highest CR (95.14%), estimated by multivariate experimental design, was found at the optimal experimental conditions of initial dye concentration 30 mg/L, adsorbent dosage 1.5 g/L, temperature $25^{\circ}C$ and contact time 10 min.
Parisa Yekan Motlagh,Alireza Khataee,Aydin Hassani,Yasin Orooji 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.126 No.-
Exfoliation of bulk hematite (a-Fe2O3), as an environmentally friendly, nontoxicity, and low-cost semiconductoroxide, exhibited greater photocatalytic activity under visible light irradiation. Herein, wedescribed two preparation methods of novel two-dimensional non-van der Waals hematene (2D-Hm)nanosheets including ultrasound-assisted liquid-phase exfoliation (US-Hm) and chemical-assistedliquid-phase exfoliation (CH-Hm). The photocatalytic activity of 2D-Hm nanosheets was evaluated forthe decomposition of Tetracycline (TC). Various advanced analyses were used to investigate the physicaland chemical properties of the exfoliated samples. SEM and TEM analyses confirmed the layered structuresof 2D-Hm. The crystalline structure of 2D-Hm samples was confirmed successfully by XRD analyses. After exfoliation of bulk hematite, the surface area increased remarkably from 5.73 m2/g to 24.16, and15.26 m2/g using US-Hm, and CH-Hm exfoliation methods, respectively. The photoelectrochemical photocurrentand electrochemical impedance spectroscopy (EIS) analysis indicate that 2D-Hm samples havehigher charge-transfer efficiency than bulk hematite. Additionally, the formation of hydroxyl (OH) radicalswas approved using the o-phenylenediamine (OPD) and photoluminescence (PL) analysis. The leachingiron concentration in the aqueous phase was measured within five consecutive examinations. Torecognize the intermediates formed during the degradation process, gas chromatography-mass spectrometry(GC–MS) was employed.