Kinetics of Chromium Ion Removal from Tannery Wastes Using Amberlite IRA-400 Cl− and its Hybrids

Abstract

A strong base anion exchange resin Amberlite IRA-400 Cl − and its hybrids with Mn(OH) 2 and Cu(OH) 2 are used for the removal of chromium from the synthetic spent tannery bath. The recovery is examined by varying the experimental conditions, viz., resin dosage, stirring speed, and temperature. The rate of chromium removal by Amberlite IRA-400 Cl − increased almost four times when the resin dosage was increased from 0.2 to 1.0 g. Furthermore, the rate of chromium sorption almost doubled when the stirring speed was increased from 100 to 1,000 rpm, suggesting that the sorption is a diffusionally controlled process. The chromium removal capacity also increased with the rise of temperature, showing the endothermic nature of the process. The results are explained with the help of film diffusion, particle diffusion, and Lagergren pseudo-first-order kinetic models. The kinetics results of the Amberlite IRA-400 Cl − are compared with its hybrid anion exchange resins IRA-400 Mn(OH) 2 and IRA-400 Cu(OH) 2 . It is found that the hybrid ion exchangers have greater removal ability and fast kinetics as compared to the parent exchanger.

Biosorption of lead, chromium and cadmium in tannery effluent using indigenous microorganisms

“…Bello et al (2016) reported heavy metal accumulations in vital human organs via the consumption of crops after the discharge of tannery effluents for irrigation purpose. This results into various degrees of illnesses on acute and chronic exposure, such as cancer, kidney dysfunction, cholera and skin irritations (Mustafa et al, 2010). Heavy metals in the tannery effluent is one of the most hazardous environmental pollutants, toxic heavy metals like Cr, Cu, Zn, Pb and Cd are mostly absorbed and get accumulated in various plant part as free metals, which may adversely affect the plant growth and metabolism.…”

Chromium (VI) removal from aqueous solutions by purolite base anion-exchange resins with gel structure

“…The initial pH of the solutions was adjusted to the desired value by the addition of HCl diluted solutions. After a specified phases contact time, the resin was separated by filtration and the Lewatit MP64 Macroporous styrene-DVB matrix, WBA type, tertiary and quaternary amine groups [10,11] Lewatit MP500 Macroporous styrene-DVB matrix, SBA type, quaternary amonium group [10] Lewatit 610 Macroporous styrene-DVB matrix, SBA type, tertiary amine (dimethyl aminoethanol) group [12] Lewatit MP62 Macroporous styrene-DVB matrix, WBA type, tertiary amine group [12] Lewatit FO36 Macroporous, polystyrene-based, monodispersed, SBA type, doped with a nano-scaled film of iron oxide [13] Amberlite IRA-400 Macroporous styrene-DVB matrix, SBA type, quaternary amine group [14] Amberlite IRA 410 Gel, styrene-DVB matrix, SBA resin, quaternary amine group type 2 [15] Amberlite IRA 910 Macroreticular crosslinked polystyrene matrix, SBA, quaternary amine group type 2 [16] Amberlite IRA96 Styrene-DVB matrix (macroreticular), WBA type, tertiary amine group [17] Dowex 1x8 Styrene-DVB, fine mesh, SBA type, quaternary amine group [17] Dowex 1x8 Gel, styrene-DVB matrix, SBA type, quaternary amine group [18] D301, D354 Macroporous styrene-DVB matrix, WBA type, tertiary amine group [19] D314 Macroporous polyacrylic matrix, WBA type, tertiary amine group [19] RQA Glycidyl methacrylate matrix, SBA type, quaternary amine group [20] 701 (China) Propylene oxide -polyethylene polymer, gel, epoxy WBA resin [21] PyR1, PyR2 Gel (pyr1) and macroporous (pyr2) 4-vinyl-pyridine-DVB matrix, SBA type, quaternary nitrogen atom [22] SBAB Acrylic copolymer, SBA type with tertiary amine, quaternary ammonium and ketone groups [23] residual concentration of Cr (VI) in solution was analyzed. The effect of the operating process parameters was investigated according to the conditions listed in Table 3.…”

“…Nonlinear regression analysis was performed using the Solver add-in functions of Microsoft Excel software, to minimize the sum of the squared errors. In order to evaluate whether the model was adequate to describe the experimental equilibrium data, along with the values of correlation coefficients (R 2 ), two error functions were used for error analysis, namely the residual root mean square error (RMSE) and chi-square test, expressed by equations [31,32] (14) where subscripts "exp" and "calc" indicate the experimental and calculated values for the each isotherm model, respectively, and n is the number of measurements. The higher R 2 values and smaller RMSE and chi-square are better for data fitness.…”

Quantitative Estimation of Cr and Pd in <I>Heteropneustes Fossilis</I> Fish due to Absorption from Tannery Waste Water

“…Recently, it has been investigated the Ni toxicity in marine and estuarine invertebrates and fish [6], mercury (Hg) concentration in sharks [7], toxicity of Cu and chromium (Cr) nanoparticles to Daphnia magna [8]. Similarly, due to large scale usage of chemicals in various human activities, industrialization, and also for population [9] growth, Bangladesh is going to a victim from water pollution. The released organic compounds and heavy metals are one of the key factors that exert negative influences on man and environment, those are causing toxicity to plants and marine life [10].…”