title: An environment-friendly and multi-functional absorbent from chitosan for organic pollutants and heavy metal ion.
abstract: Developing environment-friendly green absorbents for disposal of wastewater remains to be studied. In this paper, the cross-linked chitosan aerogel (CsA) as an environment-friendly absorbent was obtained by a simple method involving cross-linked process and freeze drying technique. Compared with conventional absorbents, the porous chitosan aerogel was provided with unique properties such as low density (0.0283g/cm(3)), high porosity (97.98%) and outstanding adsorption performance. The chitosan aerogel also displayed good reusability and excellent elasticity with a maximal thickness recovery up to 96.8% of the original thickness. The as-prepared absorbent exhibited preferable adsorption capacities for crude oil, diesel and copper ion (41.07g/g, 31.07g/g and 21.38mg/g, respectively). The aerogel can collect a wide range of organic solvents and oils with absorption capacities up to 40 times their own weight, depending on the density and viscosity of the liquids. The adsorption capacity for heavy metal ion was also considerable and the maximum adsorption capacity (qm) of the aerogel for copper ion was 35.08mg/g according to Langmuir isotherm model. Consequently, the chitosan aerogel with versatile adsorption properties has a good potential for wastewater treatment in environmental application.
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China.
authors.forename: Ang
authors.initials: A
authors.lastname: Li
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China.
authors.forename: Runjun
authors.initials: R
authors.lastname: Lin
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China.
authors.forename: Chong
authors.initials: C
authors.lastname: Lin
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China.
authors.forename: Bianyang
authors.initials: B
authors.lastname: He
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Zheng
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China. Electronic address: lulingbin@126.com.
authors.forename: Lingbin
authors.initials: L
authors.lastname: Lu
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou, 570228, Hainan, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Cao
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D019216:Metals, Heavy / Q000302:isolation & purification*; D009930:Organic Chemicals / Q000302:isolation & purification*; D016062:Porosity; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D048271:Chitosan; D019216:Metals, Heavy; D009930:Organic Chemicals; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Chitosan aerogel; Copper ion; Glutaraldehyde; Multi-functional absorbent; Organic pollutants