Kinetics of a reactive dye adsorption onto dolomitic sorbents

2003 ◽  
Vol 37 (9) ◽  
pp. 2081-2089 ◽  
Author(s):  
G.M. Walker ◽  
L. Hansen ◽  
J.-A. Hanna ◽  
S.J. Allen
Keyword(s):  
Dye Adsorption ◽  
Reactive Dye ◽  
Kinetics Of

scholarly journals Adsorbent from Textile Waste for Removal of Textile Reactive Dye from Water – Equilibrium Adsorption and Kinetics

Tekstilec ◽  
2021 ◽  
Vol 64 (4) ◽  
pp. 286-297
Author(s):  
Aleksandra Micic ◽  
◽  
Ivanka Ristic ◽  
Suzana Djordjevic ◽  
Nebojsa Ristic ◽  
...  
Keyword(s):  
Dye Adsorption ◽  
Reactive Dye ◽  
Equilibrium Adsorption ◽  
Order Model ◽  
Quantitative Characterization ◽  
Water Equilibrium ◽  
Cotton Knitted Fabric ◽  
Kinetics Of ◽  
Statistical Indicators

The removal of textile reactive dye from an aqueous solution on a new adsorbent prepared from waste cotton knitted fabric was investigated in this study. Waste cotton textile, used for the production of adsorbents, is a by-product of the cutting of stacked parts of cotton knitwear planned for the production of women’s T-shirts. The degree of efficiency of a paper pattern determines the amount of collected waste. The qualitative and quantitative characterization of the new adsorbent showed carbon and oxygen to be dominant in the chemical composition. A longer contact time means a greater amount of dye on the adsorbent, i.e. the dye concentration in the solution decreases with the duration of the adsorption process. The percentage of removed dye decreases with an increase in the initial dye concentration in the solution. However, the actual amount of adsorbed dye increases as the initial dye concentration increases. The results for equilibrium adsorption show that the Langmuir isotherm can be used for the interpretation of reactive dye adsorption on a new adsorbent. The pseudo-first order model can be fully used to describe the kinetics of dye adsorption on an adsorbent, with respect to valid results for statistical indicators. Based on the results, it can be concluded that the new adsorbent obtained from waste textiles has the potential to remove textile reactive dye from aqueous solutions.

Equilibrium and kinetics of Safranin O dye adsorption on MgO decked multi-layered graphene

2014 ◽  
Vol 258 ◽  
pp. 412-419 ◽  
Author(s):  
Naresh Kumar Rotte ◽  
Subbareddy Yerramala ◽  
Jeyaraj Boniface ◽  
Vadali V.S.S. Srikanth
Keyword(s):  
Dye Adsorption ◽  
Equilibrium And Kinetics ◽  
Safranin O ◽  
Kinetics Of

scholarly journals Application of activated bentonite for the removal of direct and reactive dye from aqueous solutions

2019 ◽  
Vol 25 (4) ◽  
pp. 341-351
Author(s):  
Aleksandar Zdravkovic ◽  
Novica Stankovic ◽  
Nebojsa Ristic ◽  
Goran Petkovic
Keyword(s):  
Aqueous Solutions ◽  
Dye Adsorption ◽  
Bentonite Clay ◽  
Reactive Dye ◽  
Second Order ◽  
Intra Particle Diffusion ◽  
Naoh Solution ◽  
Activated Bentonite ◽  
Endothermic Process ◽  
Pseudo Second Order

The aim of this study was to determine adsorptive properties of acid activated bentonite clay for the removal of Direct Red 173 (DR 173) and Reactive Red 22 (RR 22) dyes from aqueous solutions. Raw and modified clay were characterized by the following methods: Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD), and scanning electron microscopy (SEM). The efficiency of activated clay adsorption was investigated depending on process parameters: the adsorbent dose, pH, temperature, initial dye concentration, and contact time. Experimental data were analyzed by Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm as well as kinetic models of pseudo-first order, pseudo-second order and intra-particle diffusion. The process of dye adsorption was best described by Langmuir, Temkin, and Dubinin-Radushkevich isotherm (R2 > 0.97). Pseudo-second order model (R2 > 0.99) had the highest correlation with the obtained kinetic results. The positive value of ?H? indicated that adsorption of dyes by activated bentonite clay is endothermic process. The activated bentonite exhibited good regenerative ability in the 0.1 M NaOH solution. Maximum adsorption capacities of acid activated bentonite clay at 25?C for DR 173 and RR 22 dyes were 356.65 and 109.58 ?mol g-1, respectively.

scholarly journals New insights in the use of a strong cationic resin in dye adsorption

2020 ◽  
Vol 81 (4) ◽  
pp. 773-780
Author(s):  
Paola Santander ◽  
Estefanía Oyarce ◽  
Julio Sánchez
Keyword(s):  
Dye Adsorption ◽  
Adsorption Rate ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
First Order ◽  
Unreacted Core ◽  
Unreacted Core Model ◽  
Cationic Resin ◽  
Kinetics Of ◽  
Solution Volume

Abstract The adsorption of methyl orange (MO) in aqueous solution was evaluated using a cationic polymer (Amberlite IRA 402) in batch experiments under different experimental variables such as amount of resin, concentration of MO, optimum interaction time and pH. The maximum adsorption capacity of the resin was 161.3 mg g−1 at pH 7.64 at 55 °C and using a contact time of 300 min, following the kinetics of the pseudo-first-order model in the adsorption process. The infinite solution volume model shows that the adsorption rate is controlled by the film diffusion process. In contrast, the chemical reaction is the decisive step of the adsorption rate when the unreacted core model is applied. A better fit to the Langmuir model was shown for equilibrium adsorption studies. From the thermodynamic study it was observed that the sorption capacity is facilitated when the temperature increases.

Adsorption Kinetics of Reactive Dyes on Silk with Octyl Butyl Dimethyl Ammonium Bromide as Accelerant

2012 ◽  
Vol 549 ◽  
pp. 278-282 ◽  
Author(s):  
Cheng Chen ◽  
Guang Xian Zhang ◽  
Feng Xiu Zhang ◽  
Hui Zheng
Keyword(s):  
Adsorption Kinetics ◽  
Dye Adsorption ◽  
Reactive Dyes ◽  
Second Order ◽  
Ammonium Bromide ◽  
Order Kinetic ◽  
Dye Uptake ◽  
Dimethyl Ammonium ◽  
Adsorption Rates ◽  
Kinetics Of

With octyl butyl dimethyl ammonium bromide (OBDAB) as accelerant, adsorption kinetics of dyeing silk with three reactive dyes was studied in this paper. As concentration of OBDAB increased, the dye-uptake rate increased. The highest dye-uptake rates of three reactive dyes could reach to 89.40%~98.98% and the concentration of OBDAB was only 6-8g/L. This showed OBDAB was an effective accelerant. Pseudo first- and second-order kinetic models were used to analyze the adsorption kinetic data. The experimental data were found to follow the second-order kinetic model. Meanwhile, the initial dye adsorption rates of reactive red dye B-3BF, reactive yellow dye B-4RFN and reactive orange dye B-2RLN increased as temperature increased, and the activation energy of them were found respectively to be 28.42,13.14,32.90 kJ/mol.The positive values of and obtained indicated that reactive dyes adsorption with OBDAB as accelerant was an endothermic process. The conclusion showed OBDAB was a potential accelerant.

Sign in / Sign up

Export Citation Format

Share Document