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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Thakur, Shiwali Kumari, Sapana Dogra, Priyanka Chauhan, Ghanshyam S. |
| Description | Country affiliation: India Author Affiliation: Thakur S ( Himachal Pradesh University, Department of Chemistry, Shimla 171005, India.); Kumari S ( Himachal Pradesh University, Department of Chemistry, Shimla 171005, India.); Dogra P ( Himachal Pradesh University, Department of Chemistry, Shimla 171005, India.); Chauhan GS ( Himachal Pradesh University, Department of Chemistry, Shimla 171005, India. Electronic address: ghanshyam_in2000@yahoo.com.) |
| Abstract | Modification of biopolymers by oxidation is an easy process to develop effective adsorbents for the removal of toxic metal ions from their aqueous solutions. In the present study, guar gum (GG) was crosslinked with epichlorohydrin and then oxidized to the polydialdehyde form (GG-clPDA). The latter was converted to a Schiff-base, GG-clCHN(CH2)6NCHGG, by reaction with hexamethylenediamine. Different forms of the modified GG were characterized by SEM, FTIR and XRD and investigated as adsorbents for the removal of Hg(II) ions from their aqueous solutions. The adsorption process was carried out through the variation of time, temperature, pH and initial concentration of Hg(II) ions. GG-clCHN(CH2)6NCHGG was observed to be an efficient adsorbent with a maximum adsorption capacity of 41.13 mg/g. It is reusable up to five cycles at the optimum conditions obtained for the maximum ions uptake. The kinetic data generated fit the Freundlich isotherm and pseudo-second order kinetics. |
| File Format | HTM / HTML |
| ISSN | 01448617 |
| Volume Number | 106 |
| e-ISSN | 18791344 |
| Journal | Carbohydrate Polymers |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-06-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biochemistry__semicolon__materials Discipline Science Galactans Chemistry Mannans Mercury Compounds Isolation & Purification Plant Gums Schiff Bases Chemical Synthesis Water Pollutants, Chemical Water Purification Methods Adsorption Cross-linking Reagents Diamines Epichlorohydrin Hydrogen-ion Concentration Kinetics Metals, Heavy Poisoning Prevention & Control Temperature Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Materials Chemistry Polymers and Plastics |
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