title: Biochars with excellent Pb(II) adsorption property produced from fresh and dehydrated banana peels via hydrothermal carbonization.
abstract: Fresh and dehydrated banana peels were used as biomass feedstock to produce highly effective sorbent biochars through a facile one-step hydrothermal carbonization approach with 20%vol phosphoric acid as the reaction medium. The elemental ratio of oxygen content of the two as-prepared biochars were about 20%, and the FT-IR analysis confirmed the existence of abundant surface functional groups such as hydroxyl and carboxyl which greatly enhanced the adsorption performance. The sorbents showed excellent lead clarification capability of 359mg·g-1and 193mg·g-1for dehydrated and fresh banana peels based biochars, respectively. The change of the CO/OCO and the appearance of PbO/PbOC on the surface after adsorption confirmed that the ion exchange might be the dominant mechanism. The dehydration and pulverization pre-treatment and the addition of phosphoric acid can benefit the formation of those functional groups and hydrothermal carbonization can be a promising method to transfer biomass like fruit peels into biochars with excellent adsorption performance.
authors.affiliation: College of Science, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zhou
authors.affiliation: College of Science, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Honggang
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Science, China Pharmaceutical University, Nanjing 211198, China.
authors.forename: Junting
authors.initials: J
authors.lastname: Xi
authors.affiliation: College of Science, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Denghui
authors.initials: D
authors.lastname: Yao
authors.affiliation: College of Science, Hunan Agricultural University, Changsha 410128, China. Electronic address: zhouzhi@hunau.edu.cn.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China; Hunan Province University Key Laboratory for Agricultural Biochemistry and Biotransformation, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Tian
authors.affiliation: College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China; Hunan Province University Key Laboratory for Agricultural Biochemistry and Biotransformation, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Lu
mesh_terms: D000327:Adsorption; D018533:Biomass; D002244:Carbon / Q000737:chemistry / Q000493:pharmacokinetics*; D002606:Charcoal / Q000737:chemistry / Q000493:pharmacokinetics*; D003890:Desiccation; D006358:Hot Temperature; D007854:Lead / Q000493:pharmacokinetics*; D028521:Musa / Q000737:chemistry / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry
chemical_list: C540010:biochar; D014867:Water; D002606:Charcoal; D007854:Lead; D002244:Carbon
keywords: Banana peel; Biochar; Hydrothermal carbonization; Lead removal