title: New cellulose-lysine Schiff-base-based sensor-adsorbent for mercury ions.
abstract: Mercury is a highly toxic environmental pollutant; thus, there is an urgent need to develop new materials for its simultaneous detection and removal from water. In the present study, new oxidized cellulose-based materials, including their Schiff bases, were synthesized and investigated as a sensor-adsorbent for simple, rapid, highly selective, and simultaneous detection and removal of mercury [Hg(II)] ions. Cellulose was extracted from the pine needles, etherified, oxidized, and modified to Schiff base by reaction with l-lysine. The well-characterized cellulose Schiff base materials were used as a sensor-adsorbent for Hg(II) from aqueous solution. Hg(II) sensing was analysed with naked-eye detection and fluorescence spectroscopy. Schiff base having a decyl chain, C10-O-cell-HC═N-Lys, was observed to be an efficient adsorbent with a very high maximum adsorption capacity of 258.75 mg g(-1). The data were analyzed on the basis of various kinetic and isotherm models, and pseudo-second-order kinetics and Langmuir isotherm were followed for Hg(II) adsorption.
authors.affiliation: Department of Chemistry, Himachal Pradesh University , Summer Hill, Shimla, Himachal Pradesh 171005, India.
authors.forename: Sapana
authors.initials: S
authors.lastname: Kumari
authors.forename: Ghanshyam S
authors.initials: GS
authors.lastname: Chauhan
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000737:chemistry*; D008239:Lysine / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D028223:Pinus / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D002482:Cellulose; D008628:Mercury; D008239:Lysine