title: Synthesis of cross-linked chitosan and application to adsorption and speciation of Se (VI) and Se (IV) in environmental water samples by inductively coupled plasma optical emission spectrometry.
abstract: A new type of cross-linked chitosan was synthesized with Diethylene Triamine (DCCTS). The adsorption of Se (VI) on DCCTS was studied. The effect factors on adsorption and the adsorption mechanism were considered. The results indicated that the DCCTS could concentrate and separate Se (IV) at pH = 3.6; the maximum adsorption efficiency was 94%, the adsorption equilibrium time was 30 min; the maximum adsorption capacity was 42.7 mg/g; the adsorption fitted Langmuir equation. A novel method for speciation of Se (VI) and Se (IV) in environmental water samples has been developed using DCCTS as adsorbent and ICP-OES as determination means. The detection limit of this method was 12 ng/L, the relatively standard deviation was 4.5% and the recovery was 99%~104%.
authors: College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China; E-Mail: renfl2008@163.com.
authors: Jun
authors: J
authors: Dai
authors: Feng Lian
authors: FL
authors: Ren
authors: Chun Yuan
authors: CY
authors: Tao
authors: Yang
authors: Y
authors: Bai
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D011073:Polyamines / Q000737:chemistry; D012643:Selenium / Q000032:analysis / Q000737:chemistry*; D013053:Spectrophotometry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D007477:Ions; D011073:Polyamines; D014874:Water Pollutants, Chemical; C005391:diethylenetriamine; D048271:Chitosan; D012643:Selenium