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Adsorption of phosphorus by calcium-flour biochar: Isotherm, kinetic and transformation studies
Wang, SD; Kong, LJ; Long, JY; Su, MH; Diao, ZH; Chang, XY; Chen, DY; Song, G; Shih, KM; kongl_jun@163.com; kshih@hku.hk
2018
Source PublicationCHEMOSPHERE
Volume195Pages:666-672
AbstractDischarging phosphorus (P)-contaminated water directly into the aquatic environment leads to resource loss and eutrophication. Thus, removing P from waste streams is imperative. In this study, calcium decorated biochar (Ca-BC) in different mass ratios of Ca to BC was designed to effectively adsorb P from solution. Ca-BC was characterized through X-ray diffraction (XRD) analysis, followed by isotherm and kinetic adsorption experiments. The decorated Ca on the BC surface was found to have preferred P adsorption ability. A design of calcium hydroxide (Ca(OH)(2)) to flour in a mass ratio of 2:1 was found to have a maximum adsorption capacity of 314.22 mg g(-1) for P. The Langmuir and pseudo-second-order models fit the sorption process adequately. XRD analysis indicated that the preferable adsorption ability to P was due to the reaction of Ca(OH)(2) and PO34-, forming the hydroxylapatite (Ca-5(PO4)(3)(OH)) crystal. The P in solution was transformed to the crystal. Thus, Ca-BC is an environmental friendly and low-cost sorbent for P removal. (C) 2017 Elsevier Ltd. All rights reserved.
Department[Wang, Shengdan; Kong, Lingjun; Long, Jianyou; Su, Minhua; Chang, Xiangyang; Chen, Diyun; Song, Gang] Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China; [Kong, Lingjun; Long, Jianyou; Chang, Xiangyang; Chen, Diyun; Song, Gang] Guangdong Prov Key Lab Radioact Contaminat Contro, Guangzhou 5100056, Guangdong, Peoples R China; [Kong, Lingjun; Shih, Kaimin] Univ Hong Kong, Dept Civil Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China; [Diao, Zenghui] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
Subject AreaEnvironmental Sciences & Ecology
WOS KeywordPhosphorus ; HydroxyLapatite ; Calcium hydroxide ; Ca-BC ; Adsorption
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/16996
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authorkongl_jun@163.com; kshih@hku.hk
Recommended Citation
GB/T 7714
Wang, SD,Kong, LJ,Long, JY,et al. Adsorption of phosphorus by calcium-flour biochar: Isotherm, kinetic and transformation studies[J]. CHEMOSPHERE,2018,195:666-672.
APA Wang, SD.,Kong, LJ.,Long, JY.,Su, MH.,Diao, ZH.,...&kshih@hku.hk.(2018).Adsorption of phosphorus by calcium-flour biochar: Isotherm, kinetic and transformation studies.CHEMOSPHERE,195,666-672.
MLA Wang, SD,et al."Adsorption of phosphorus by calcium-flour biochar: Isotherm, kinetic and transformation studies".CHEMOSPHERE 195(2018):666-672.
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