Kinetic and isothermal studies of manganese (VII) ions removal using Amberlite IRA-420 anion exchanger

Abstract

a b s t r a c tAnion exchanger (Amberlite IRA-420; AMB) has been used in the removal of permanganate ions from potassium permanganate contaminated water. Operational conditions such as permanganate concentration, adsorption time, adsorption temperature, adsorption pH, agitation speed, and finally adsorbent dosage have been investigated, and its impact on the removal process efficiency has been presented. Moreover, the kinetic and equilibrium results obtained for permanganate ions sorption with different initial concentrations onto AMB were analyzed. Kinetic modeling analysis with three different types of kinetic sorption models (pseudo-first-order, pseudo-second-order, and simple Elovich models) was applied to simulate the permanganate ions sorption data. The analysis of the kinetic data indicated that the sorption was a second-order process. An ion-exchange mechanism may have existed in the permanganate ions-sorption process with AMB. The permanganate ions uptake by AMB was quantitatively evaluated with equilibrium sorption isotherms. To describe the isotherms mathematically, the experimental data of the removal equilibrium were correlated with the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich (D-R) isotherm models, and the applicability of these isotherm equations to the sorption systems was compared by the correlation coefficients. The maximum sorption capacities, determined from the Langmuir isotherm was 20.54 mg/g at 25°C. Moreover, diffusion mechanism of permanganate ions was described by different adsorption diffusion models. The diffusion rate equations inside particulate of Dumwald-Wagner and intraparticle models were used to calculate the diffusion rate. The actual rate-controlling step involved in the permanganate ions sorption process was determined by further analysis of the sorption data applying the kinetic expression given by Boyd.

Development of Azo Dye Immobilized Poly (Glycidyl Methacrylate-Co-Methyl Methacrylate) Polymers Composites as Novel Adsorbents for Water Treatment Applications: Methylene Blue-Polymers Composites

“…The second stage is an exponential increase of the adsorption capacity with an increase of the permanganate ions concentration from 4 ppm to 8 ppm, where the adsorption capacity increased by about ten folds to reach 0.88 mg/g. Mohy Eldin et al [ 53 ] obtained the same adsorption capacity (0.93 mg/g) using 0.1 g of wet Amberlite IRA 420 with 10 mL of 100 ppm permanganate. The mixture was agitated at R·T using a magnetic stirrer for 30 min.…”

“…Synthetic dichromate (Cr VI) and permanganate (Mn VII) solutions, 20 mL, with varying concentrations, 2–8 ppm, were mixed with 0.1 g of MB-SPGMA composite at room temperature for 3 h, then separated by centrifugation under 12,000 rpm for 30 min, used in batch adsorption experiments. The Cr (VI) and Mn (VII) concentration at ppm, before and after the adsorption, for each solution was determined by measuring the absorbance at the maximum wavelength (ʎ max = 380 nm and 550 nm) using UV-VIS spectrophotometer and multiplied by constant extracted from the slope of the standard curve [ 52 , 53 ]. The adsorption capacity was calculated according to Equation (2).…”

Effective Removal of Carcinogenic Azo Dye from Water Using Zea mays-Derived Mesoporous Activated Carbon

“…Compared to An with CNTs (416.7 mg/g) and Amberlite IRA-420 anion exchanger (20.54 mg/g), the estimated sorption capacity of MO with ZMAC was determined to be 66.2 mg/g, , with 69.40 mg/g for SiO 2 NPs, 97.1 mg/g or fabricated Fe-loaded chitosan (Fe-CS), 42.85 mg/g for functionalized CNTs-loaded TiO 2 , 62.50 mg/g for coffee waste/methylpyridinium chloride, 58.82 mg/g for coffee waste/cetyltrimethylammonium ammonium bromide, and 47.62 mg/g for surfactant-modified pineapple leaf …”

“…Per previous investigations, , the assessment of the adsorption process can be approached through a comprehensive examination of ZMAC characterization, isothermal testing, and kinetic tests, as depicted in Figure . The formation of an electric double layer around the MO ions and ZMAC surfaces is attributed to electrostatic interactions.…”

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte VII: Manganeso(VII))/H+/Amberlite 958

“…The manganese(VII) oxidation state has a double character, to one side, its oxidative powder makes to this element a powerful decontaminant for wastes containing harmful compounds (Zhang et al, 2013;Lee et al, 2014;Guo et al, 2016), on the other hand, and having the same toxicological aspects than manganese(II) (O´Neal and Zheng, 2015), this oxidative character makes to manganese(VII) to be a little more hazardous for life than manganese(II). Thus, its removal from aqueous wastes is mandatory to comply with the regulatory laws issued by industrialized countries (Mahmoud et al, 2016;Mohy Eldin et al, 2017).…”