Simultaneous removal of Basic Blue41 and Basic Red46 dyes in binary aqueous systems via activated carbon from palm bio-waste: Optimization by central composite design, equilibrium, kinetic, and thermodynamic studies

被引:29
作者
Sardi, Fatemeh Kiani Ghaleh [1 ]
Behpour, Mohsen [1 ]
Ramezani, Zahra [2 ,3 ]
Masoum, Saeed [1 ]
机构
[1] Univ Kashan, Dept Analyt Chem, Fac Chem, Kashan, Iran
[2] Ahvaz Jundishapur Univ Med Sci, Med Basic Sci Res Inst, Toxicol Res Ctr, Ahvaz, Iran
[3] Ahvaz Jundishapur Univ Med Sci, Dept Med Chem, Fac Pharm, Ahvaz, Iran
关键词
Palm bio-waste; Activated carbon; Basic Blue 41; Basic Red 46; Central Composite Design; Response surface methodology; ULTRASONIC ASSISTED ADSORPTION; METHYLENE-BLUE; CHEMICAL ACTIVATION; EFFICIENT REMOVAL; CATIONIC DYES; SURFACE-AREA; ADSORBENT; WATER; BEHAVIOR; INDUSTRY;
D O I
10.1016/j.eti.2021.102039
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
In this work, palm Bio-waste derived activated carbon (AC) was synthesized by chemical activation method and characterized via Fourier transform infrared spectroscopy (FTIR), high-resolution transmission electron microscopy (HRTEM), Field Emission-Scanning Electron microscopy(FE-SEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) specific surface area and zeta potential measurement. The impact of variables such as adsorbing mass value, contact time, and initial concentration of 2-[N-ethyl-4-[(6-methoxy-3-methyl-1,3-benzothiazol-3-ium-2-yl)diazenyl]anilino]ethanol methyl sulfate (Basic Blue 41), and N-benzyl-4-[(1,4-dimethyl-1,5-dihydro-1,2,4-triazol-1-ium-5-yl)diazenyl]-N-methyl aniline bromide (Basic Red 46) on the removal percentages of Basic Blue 41 and Basic Red 46 dyes were simultaneously studied using central composite design (CCD) and response surface methodology (RSM). In individual solutions, the adsorption process fitted well with Langmuir isotherm and pseudo-second-order kinetic models with the maximum adsorption capacities (q(m)) of 344.83 and 263.16 mg g(-1) for Basic Blue 41 and Basic Red 46, respectively. Extended Langmuir isotherm was used for the binary systems to calculate q(m), for Basic Blue 41 and Basic Red 46 as 271.81 and 127.23 mg g(-1), respectively. Therefore, it could be concluded that the mechanism of the adsorption procedure is monolayer, physical, spontaneous, endothermic, and more desirable at higher temperatures. Furthermore, Density functional theory (DFT) calculations revealed that Basic blue 41 has more electrophilicity, higher softness, and less HOMO-LUMO energy gap rather than Basic Red 46, which show a good agreement with the experimental result that proved the Basic Blue 41 has fast and more favored adsorption than Basic red 46 in binary solutions. (C) 2021 The Authors. Published by Elsevier B.V.
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页数:14
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