Adsorption of acid dyes onto bentonite modified with polycations: Kinetics study and process design to minimize the contact time
Source abstract
Abstract
Abstract The adsorption kinetics of two acid dyes, Acid Scarlet GR and Acid Dark Blue 2G, onto a bentonite modified with poly-epichlorohydrin-dimethylamine (EPI-DMA) was studied. The pseudo second-order model showed a high degree of correlation with the experimental data for the whole adsorption process, whereas the intraparticle diffusion model presented two steps with two different diffusion rate constants indicating that the intraparticle diffusion may be involved in the adsorption process during the first 15 min. A two-stage batch adsorber was designed based on the second-order kinetics and was optimized to minimize the total contact time.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Adsorption, diffusion, and thermodynamic properties of materials · Electrostatics and Colloid Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (12)
Show source-provided references
1. Application of synthetic polyamine flocculants for dye wastewater treatment10.1081/SS-100107638 ↗
2. Formation of complexes between bentonite and different cationic polyelectrolytes and their use as sorbents for non-ionic and anionic pollutants10.1016/S0169-1317(01)00099-0 ↗
3. A two-stage batch sorption optimized design for dye removal to minimize contact time10.1205/095758298529678 ↗
4. A multi-stage batch adsorption design with experimental data10.1177/026361749901700401 ↗
5. Pseudo-second order model for sorption processes10.1016/S0032-9592(98)00112-5 ↗
6. Effect of polyamine flocculant types on dye wastewater treatment
7. Adsorption of anionic dyes on poly(epicholorohydrin dimethylamine) modified bentonite in single and mixed dye solutions10.1016/j.clay.2009.06.010 ↗
8. Contact time optimization of two-stage batch adsorber design using second-order kinetic model for the adsorption of phosphate onto alunite10.1016/j.jhazmat.2006.01.058 ↗
9. A two stage batch adsorber design for methylene blue removal to minimize contact time10.1016/j.jenvman.2005.10.004 ↗
10. Modification of bentonite with a cationic surfactant: an adsorption study of textile dye Reactive Blue 1910.1016/j.jhazmat.2006.06.138 ↗
11. Formation and characteristics of cationic-polymer/bentonite complexes as adsorbents for dyes10.1016/j.clay.2006.09.008 ↗
12. Kinetics of adsorption of disperse dyes by polyepicholorohydrin-dimethylamine cationic polymer/bentonite10.1016/j.seppur.2006.10.024 ↗