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Gum xanthan-psyllium-cl-poly(acrylic acid-co-itaconic acid) based adsorbent for effective removal of cationic and anionic dyes: Adsorption isotherms, kinetics and thermodynamic studies
- Source :
- Ecotoxicology and Environmental Safety. 149:150-158
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The present work highlights the synthesis of the adsorbent based on Gum xanthan-psyllium hybrid backbone graft co-polymerized with polyacrylic acid-co-polyitaconic acid chains for the rapid sequestration of auramine-O (Aur-O) and eriochrome black-T (EBT) dyes from the aqueous fluid. The excellent dye removal efficiency of 90.53% for EBT and 95.63% for Aur-O was found at initial dye concentration of 30mgL-1 (EBT) and 15 mgL-1 (Aur-O) 40mL-1 with an adsorbent dose of 600mg within time duration of 5h and 323K temp. The adsorption isotherm data fitted well with Langmuir isotherm and Freundlich isotherm for Aur-O and EBT dyes (R2 ≥ 0.90), respectively. The adsorption kinetics depicted that pseudo-second order kinetics was followed simultaneously with intra-particle diffusion for both the dyes. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were also calculated and confirmed the spontaneity, randomness and endothermic nature of the adsorption process. Further, the adsorbent exhibited good recyclability efficiency for the capture of Aur-O and EBT from aqueous solution with minimal activity decline after six and three cycles, respectively. So, the synthesized adsorbent could be used successfully by the textile industries for the treatment of dye contaminated water with excellent competency.
- Subjects :
- Polymers
Health, Toxicology and Mutagenesis
02 engineering and technology
010402 general chemistry
01 natural sciences
Psyllium
Water Purification
Diffusion
symbols.namesake
chemistry.chemical_compound
Adsorption
Organic chemistry
Freundlich equation
Itaconic acid
Coloring Agents
Acrylic acid
Aqueous solution
Auramine O
Chemistry
Polysaccharides, Bacterial
Temperature
Public Health, Environmental and Occupational Health
Langmuir adsorption model
Hydrogels
General Medicine
021001 nanoscience & nanotechnology
Pollution
0104 chemical sciences
Eriochrome Black T
Kinetics
Benzophenoneidum
Textile Industry
symbols
Thermodynamics
0210 nano-technology
Azo Compounds
Water Pollutants, Chemical
Nuclear chemistry
Subjects
Details
- ISSN :
- 01476513
- Volume :
- 149
- Database :
- OpenAIRE
- Journal :
- Ecotoxicology and Environmental Safety
- Accession number :
- edsair.doi.dedup.....5894d1c6988d6ba0ccc5d9ae714f42f5