title: High-capacity adsorption of Cr(VI) from aqueous solution using a hierarchical porous carbon obtained from pig bone.
abstract: A hierarchical porous carbon obtained from pig bone (HPC) was utilized as the adsorbent for removal of Cr(VI) from aqueous solution. The effects of solution pH value, concentration of Cr(VI), and adsorption temperature on the removal of Cr(VI) were investigated. The experimental data of the HPC fitted well with the Langmuir isotherm and its adsorption kinetic followed pseudo-second order model. Compared with a commercial activated carbon adsorbent (Norit CGP), the HPC showed an high adsorption capability for Cr(VI). The maximum Cr(VI) adsorption capacity of the HPC was 398.40 mg/g at pH 2. It is found that a part of the Cr(VI) was reduced to Cr(III) on the adsorbent surface from desorption experiment data. The regeneration showed adsorption capacity of the HPC can still achieve 92.70 mg/g even after fifth adsorption cycle.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Ministry of Education, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing 100029, PR China.
authors.forename: Shaochen
authors.initials: S
authors.lastname: Wei
authors.forename: Dongtian
authors.initials: D
authors.lastname: Li
authors.forename: Zhe
authors.initials: Z
authors.lastname: Huang
authors.forename: Yaqin
authors.initials: Y
authors.lastname: Huang
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000818:Animals; D001842:Bone and Bones / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D002857:Chromium / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008956:Models, Chemical; D016062:Porosity; D012996:Solutions; D034421:Sus scrofa; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D002857:Chromium; D002606:Charcoal; C074702:chromium hexavalent ion