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Niyaz Mohammad Mahmoodi,Jafar Abdi 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
Herein, Zeolitic imidazole framework-8 (ZIF-8) as a 3D nanoporous support was synthesized and itssurface was functionalized to attain amino-functionalized nanoparticles. Laccase enzyme was covalentlyimmobilized onto ZIF-8 nanoparticles via glutaraldehyde (GA) as the linker to prepare a novel MOF-basednanobiocatalyst (NBC) for degrading organic pollutant (Acid Blue 92: AB92). The FTIR, FESEM, TEM, XRD,BET, and TGA were employed for characterizing of all prepared samples. The effect of catalyst mass, AB92concentration, temperature, and pH were studied on dye decolorization of. The results showed that thebiodegradation amount of AB92 followed by the Michaelis-Menten kinetic model.
Niyaz Mohammad Mahmoodi,Mahdieh Sadat Mirmohammad Ali Roudaki,Khadijeh Didehban,Mohammad Reza Saeb 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.9
The worth of this work lies in giving the surface of starch a positive charge for removal of azo dyes. A novel ethylenediamine/glutaraldehyde-modified starch (SEG) bioadsorbent was developed here, characterized by Fourier infrared spectroscopy and scanning electron microscopy analyses, and then applied in removal of Direct Red 23 (DR23) and Acid Blue 92 (AB92) anionic dyes from aqueous solutions. The efficacy of the SEG as bio-based adsorbent was studied in terms of adsorption characteristics, including dye removal percent, adsorption capacity, adsorption kinetic and adsorption isotherm, taking the initial dye concentration, adsorption time and SEG dosage as changing variables. Overall, it was found that the SEG is an efficient bio-based adsorbent in removal of anionic dyes. Experimental analyses (Temperature=25 oC & pH=2) revealed that either a pseudo-second-order kinetic or Langmuir isotherm model can properly express the behavior of adsorption based on chemisorption phenomenon. For structural change characterization, FT-IR analysis was performed. The highest adsorption efficiency belonged to the solution in which 0.035 g SEG was added to 30mg/L water.
Niyaz Mohammad Mahmoodi,Zahra Hosseinabadi-Farahani,Hooman Chamani 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.3
β-Ni(OH)2 nanoparticle was synthesized and used as an adsorbent. The prepared adsorbent was characterized by scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) and X-ray diffraction (XRD). Least square support vector machine (LSSVM) as an intelligent model was applied for modeling of dye removal based on experimental data obtained from laboratory. The nanostructured adsorbent was used to remove three cationic dyes (BB41: Basic blue 41, BR18: Basic Red 18 and BR46: Basic Red 46) from single and binary systems at room temperature. The kinetics and isotherm of dye adsorption was studied. The effects of adsorbent dosage and initial dye concentration were elucidated. The kinetic studies showed that the adsorption data followed pseudo-second order kinetics model. The isotherm analysis indicates that the adsorption data can be represented by Langmuir in single systems. Based on graphical plots and the values of statistical parameter, LSSVM as an intelligent model is suitable for modeling of dye adsorption from single and binary systems.
Niyaz Mohammad Mahmoodi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Core–shell magnetic adsorbent nanoparticle (CSMAN) was synthesized and used to remove dye from binary system. The characteristics of CSMAN were investigated using FTIR and SEM. Acid Red 18 (AR18), Direct Green 6 (DG6) and Direct Red 31 (DR31) were used. The effect of adsorbent dosage, dye concentration and salt on dye removal was evaluated. Kinetic and isotherm of dye adsorption followed pseudo-second order and Langmuir isotherm, respectively. The maximum dye adsorption capacity (Q0) was 588, 333 and 323 mg/g for AR18, DG6 and DR31, respectively. Selectivity analysis for binary system showed that the magnetic adsorbent had no selectivity.
Synthesis of cationic polymeric adsorbent and dye removal isotherm, kinetic and thermodynamic
Niyaz Mohammad Mahmoodi,Unes Sadeghi,Afshin Maleki,Bagher Hayati,Farhood Najafi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
Poly(quaternary ammonium salt) (PQAS) as a cationic polymeric adsorbent was synthesized and characterized by FTIR. Isotherm, kinetic and thermodynamic of dye removal from single and binary systems was investigated. Acid Blue 25 (AB25) and Acid Red 18 (AR18) were used. The effect of operational parameters (adsorbent dose, pH, dye concentration and salt) on dye removal was studied. The dye removal followed the Langmuir isotherm and pseudo-first order kinetics. The adsorbent maximum dye adsorption capacity (Q0) was 2000 and 1667 mg/g for AB25 and AR18, respectively. The thermodynamic data showed that dye adsorption was spontaneous, endothermic, and a physisorption reaction.
Surface modification of magnetic nanoparticle and dye removal from ternary systems
Niyaz Mohammad Mahmoodi 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-
The surface of magnetic zinc ferrite nanoparticle (ZFN) was modified using sodium dodecyl sulfate (SDS). Dye removal ability of ZFN–SDS was investigated from ternary systems. The characteristics of ZFN–SDSwere studied using FTIR, SEM, TEM and XRD. Basic Blue 41 (BB41), Basic Red 18 (BR18) and Basic Violet16 (BV16) were used. The effect of operational parameters (adsorbent dosage and initial dyeconcentration) on dye removal was evaluated. The maximum adsorption capacity (Q0) was 42, 61 and16 mg/g for BB41, BR18 and BV16, respectively. Dye adsorption on ZFN–SDS followed pseudo-secondorder kinetics and Langmuir isotherm model.
Synthesis of urethane sodium carboxylate and its dye removal ability from single system
Niyaz Mohammad Mahmoodi,Omeleila Masrouri,Farhood Najafi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Urethane sodium carboxylate (USC) was synthesized and its dye removal ability was investigated. USC characteristics were studied using FTIR and SEM. Basic Blue 41 (BB41), Basic Red 18 (BR18), and Basic Violet 16 (BV16) were used. The effect of adsorbent dosage, dye concentration and salt on dye removal was evaluated. Adsorption kinetics followed pseudo-second order. The USC adsorption capacity was 474, 538 and 298 mg/g for BB41, BR18 and BV16, respectively. Adsorption isotherm followed with Langmuir isotherm. The results showed that the USC might be a suitable adsorbent to remove dyes from colored wastewater.
Niyaz Mohammad Mahmoodi,Mohsen Taghizadeh,Ali Taghizadeh 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.2
We studied the synthesis, characterization clarification, and dye adsorption ability of chromium-based metalorganic framework (Materials Institute Lavoisier: MIL-101(Cr)). MIL-101(Cr) with 1 : 1 molar ratio of metal to ligand was ultrasound-assisted green synthesized in a DMF-free way and its adsorption capacity for pollutant remediation was studied. Several analyses were applied to clarify the characterization of materials, including TGA, SEM, XRD, FTIR, BET, and Zeta potential. Direct Red 80 (DR80) and Acid Blue 92 (AB92) were used to make model dye bearing wastewater. Response surface methodology (RSM) historical modeling was applied to the data to achieve an accurate model of the experiment. Adsorption kinetics and isotherms models were fully studied. The powerful adsorbent was the MIL- 101(Cr) with the M/L=1 : 1, which represented the high specific surface area (SSA) of 2,420m2/g and surface charge of +27.2mV. The maximum adsorption capacity was obtained 227mg/g for DR80 and 185mg/g for AB92. With an eye to the real-world application, the synthesized adsorbent well operated by removing dyes from the wastewater and high reusability after four cycles.
Sina Soroush,Niyaz Mohammad Mahmoodi,Bayramali Mohammadnezhad,Abdolreza Karimi 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.9
Activated carbon (AC), one of the most common adsorbents, and metal-organic framework (MOF), aninteresting class of materials, were used for synthesizing AC/MOF composite by the solvothermal method. The strategydesigned in this paper is to improve the removal and adsorption performance of AC for dye. MIL-53(Fe) was synthesizedon the commercial activated carbon (CAC) to prepare CAC/MIL-53(Fe) composite. Direct Red 23 (DR23)anionic dye was used as a model contaminant. FT-IR, XRD, SEM, and EDX analyses were applied to study the structureand characteristics of CAC/MIL-53(Fe). The parameters (the solution pH, amount of adsorbent dosage, initial dyeconcentration, and contact time) affecting the dye removal efficiency were investigated. The percentage of dye removal(DR23) under optimal conditions by commercial activated carbon and CAC/MIL-53(Fe) was 50% and 99.9%, respectively. The maximal capacity of adsorption was also raised from 50 to 100mg/g. The adsorption isotherm and kineticsfollowed the Langmuir and pseudo-second-order models, respectively
Khashayar Mohajershojaei,Niyaz Mohammad Mahmoodi,Alireza Khosravi 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.1
Laccase enzyme was immobilized on titaniananoparticles and the resulting nanoparticles (ILTN) werecharacterized with various techniques: FTIR and SEM. ILTN was used to degrade three anionic dyes (Direct Red31 (DR31), Acid Blue 92 (AB92), and Direct Green 6(DG6)) from aqueous solution, individually and in binarysystems. The effect of various parameters (e.g., ILTN dosage,pH, and dye concentration) on decolorization was evaluatedand the optimized conditions were determined. The amountof ILTN, reaction time, and pH for decolorization ofDR31, AB92 and DG6 was 0.1 g (for DR31 and DG6) and0.3 g (for AB92), 20 min, and pH 3 in single systems and0.3 g, 20 min and pH 3 in binary systems, respectively. Decolorization followed Michaelis-Menten kinetics.