title: Granulation and ferric oxides loading enable biochar derived from cotton stalk to remove phosphate from water.
abstract: Granulation of biochar powder followed by immobilization of ferric oxides on the macroporous granular biochar (Bg-FO-1) substantially enhanced phosphate removal from water. BET analysis confirmed that both granulation and ferric oxides loading can increase the surface areas and pore volumes effectively. Bg-FO-1 was proven to be a favorable adsorbent for phosphate. The phosphate adsorption capacity was substantially increased from 0 mg/g of raw biochar powder to 0.963 mg/g (Bg-FO-1). When the ferric oxides loading was prior to granulation, the adsorption capacity was decreased by 59-0.399 mg/g, possibly due to the decrease of micropore and mesopore area as well as the overlaying of binders to the activated sites produced by ferric oxides.
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ren
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China; Tianjin Engineering Research Center of Agricultural Ecological & Environmental Remediation, PR China. Electronic address: nli@tju.edu.cn.
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China; Department of Civil and Environmental Engineering, University of California, Irvine, United States.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China.
authors.forename: Jing-Kun
authors.initials: JK
authors.lastname: An
authors.affiliation: School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, No. 73 Huanghe Road, Nangang District, Harbin 150090, PR China.
authors.forename: Nan-Qi
authors.initials: NQ
authors.lastname: Ren
mesh_terms: D000327:Adsorption; D001709:Biotechnology / Q000379:methods*; D002606:Charcoal / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D003368:Gossypium / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry; D011208:Powders; D012987:Soil; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification
chemical_list: D005290:Ferric Compounds; D010710:Phosphates; D011208:Powders; D012987:Soil; D014874:Water Pollutants, Chemical; C540010:biochar; D014867:Water; D002606:Charcoal; C000499:ferric oxide
keywords: Biochar; Ferric oxides; Granulation; Phosphate removal