{"title":"Functionalizing biochar with Mg–Al and Mg–Fe layered double hydroxides for removal of phosphate from aqueous solutions","authors":"Stefan Wan , Shengsen Wang , Yuncong Li , Bin Gao","doi":"10.1016/j.jiec.2016.11.039","DOIUrl":null,"url":null,"abstract":"<div><p>This study examined phosphate adsorption of bamboo biochar functionalized with varying amount of Mg–Al and Mg–Fe (3:1) layered double hydroxides (LDH). Results indicated that the composite containing 40% Mg–Al LDH exhibited the highest phosphate adsorption with >95% phosphate saturation achieved within 1<!--> <span>h, following the pseudo-second-order kinetics model. Characterization and adsorption isotherm of this composite revealed interlayer anion exchange and surface adsorption as the predominant adsorption mechanism at low phosphate concentrations and phosphate precipitation at high concentrations. A lettuce seedling bioassay further demonstrated that the spent LDH/biochar composite can be recycled as a slow-release fertilizer to enhance food production.</span></p></div>","PeriodicalId":363,"journal":{"name":"Journal of Industrial and Engineering Chemistry","volume":"47 ","pages":"Pages 246-253"},"PeriodicalIF":5.9000,"publicationDate":"2017-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jiec.2016.11.039","citationCount":"187","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Industrial and Engineering Chemistry","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1226086X16304786","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 187
Abstract
This study examined phosphate adsorption of bamboo biochar functionalized with varying amount of Mg–Al and Mg–Fe (3:1) layered double hydroxides (LDH). Results indicated that the composite containing 40% Mg–Al LDH exhibited the highest phosphate adsorption with >95% phosphate saturation achieved within 1 h, following the pseudo-second-order kinetics model. Characterization and adsorption isotherm of this composite revealed interlayer anion exchange and surface adsorption as the predominant adsorption mechanism at low phosphate concentrations and phosphate precipitation at high concentrations. A lettuce seedling bioassay further demonstrated that the spent LDH/biochar composite can be recycled as a slow-release fertilizer to enhance food production.
期刊介绍：
Journal of Industrial and Engineering Chemistry is published monthly in English by the Korean Society of Industrial and Engineering Chemistry. JIEC brings together multidisciplinary interests in one journal and is to disseminate information on all aspects of research and development in industrial and engineering chemistry. Contributions in the form of research articles, short communications, notes and reviews are considered for publication. The editors welcome original contributions that have not been and are not to be published elsewhere. Instruction to authors and a manuscript submissions form are printed at the end of each issue. Bulk reprints of individual articles can be ordered. This publication is partially supported by Korea Research Foundation and the Korean Federation of Science and Technology Societies.
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