title: Cu(II) removal from aqueous solution by Spartina alterniflora derived biochar.
abstract: A cost-effective biochar (SABC) was prepared from Spartina alterniflora by pyrolysis at low temperatures (≤ 500 °C) under anoxic conditions. The obtained biochar was examined for its ability to adsorb copper ions from aqueous solution and the Cu(II) removal mechanisms were explored. Cu(II) adsorption on SABC was found to fit well with Langmuir isotherm and pseudo-second-order kinetic model. The maximum Cu(II) adsorption capacity of SABC reached 48.49 mg g(-1), which is about 5 times higher than the raw biomass. Ion exchange had negligible effect on Cu(II) removal. Based on FTIR spectra and potentiometric titration, a complexation model including two acidic and one basic functional groups was proposed. However, metal ions complexation with the surface sites could not account for the uptake amounts of Cu(II) by SABC, alternative binding mechanisms might involve simultaneously.
authors: School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Road, Shanghai 200444, China.
authors: Mi
authors: M
authors: Li
authors: Qiang
authors: Q
authors: Liu
authors: Lijing
authors: L
authors: Guo
authors: Yaping
authors: Y
authors: Zhang
authors: Zhenjun
authors: Z
authors: Lou
authors: Yang
authors: Y
authors: Wang
authors: Guangren
authors: G
authors: Qian
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D003300:Copper / Q000032:analysis / Q000737:chemistry*; D007700:Kinetics; D006109:Poaceae; D014873:Water Pollutants / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D014873:Water Pollutants; C540010:biochar; D002606:Charcoal; D003300:Copper