title: A study in the adsorption of Fe(2+) and NO(3)(-) on pine needles based hydrogels.
abstract: Novel supports for use as cation and anion adsorbents were prepared from lignocellulosics using pine needles and their carboxymethylated forms by network/hydrogel formation with acrylamide and N,N-methylene bisacrylamide. The hydrogels thus prepared were further functionalized by partial alkaline hydrolysis with 0.5 N NaOH and were characterized by FTIR, SEM and nitrogen analysis. Adsorption of Fe(2+) on these hydrogels was carried as a function of time, temperature, pH and ionic strength. The hydrogel having the maximum adsorption capacity was loaded with Fe(2+) at the conditions those afforded maximum uptake and was used as novel anionic adsorbent for NO(3)(-). The water uptake capacities and biodegradability of the hydrogels before and after the ion loading was studied to evaluate the possible end-uses of these hydrogels as alternate materials in the removal of ionic species from water.
authors.affiliation: Department of Chemistry, Himachal Pradesh University, Shimla 171 005, India. ghanshyam_in2000@yahoo.com
authors.forename: Ghanshyam S
authors.initials: GS
authors.lastname: Chauhan
authors.forename: Sandeep
authors.initials: S
authors.lastname: Chauhan
authors.forename: Sunil
authors.initials: S
authors.lastname: Kumar
authors.forename: Anita
authors.initials: A
authors.lastname: Kumari
mesh_terms: D000327:Adsorption; D005296:Ferrous Compounds / Q000737:chemistry*; D020100:Hydrogels; D008855:Microscopy, Electron, Scanning; D009566:Nitrates / Q000737:chemistry*; D028223:Pinus / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D005296:Ferrous Compounds; D020100:Hydrogels; D009566:Nitrates