title: CeO2-covered nanofiber for highly efficient removal of phosphorus from aqueous solution.
abstract: The lowering phosphorus concentration of lakes or rivers using adsorbents has been considered to be the most effective way to prevent water eutrophication. However, the development of an adsorbent is still challenging because conventional adsorbents have not shown a sufficient phosphorus adsorption capacity (0.3-2.0mmol/g) to treat industrial, agricultural or domestic wastewater at a large scale. Herein, a novel and effective strategy to remove phosphorus efficiently with a CeO2-covered nanofiber is shown. The CeO2-covered nanofiber was synthesized through (1) amine group immobilization onto an electrospun polyacrylonitrile nanofiber and (2) adsorption of Ce(3+) on it. The CeO2-covered nanofiber played a role in catching phosphate ions in an aqueous solution by the oxidation, reduction, and ion-exchange of adsorbed Ce(3+) on the nanofiber from CeO2 to CePO4, and enabled remarkable phosphate adsorption capacity of the nanofiber (ca. 17.0mmol/g) at the range of ca. pH 2-6. Our strategy might be the most feasible method to efficiently lower the phosphorus concentration in lakes or rivers owing to the easy and inexpensive preparation of CeO2-covered nanofiber at an industrial scale, with a high phosphate adsorption capacity.
authors.affiliation: Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon 305-353, Republic of Korea.
authors.forename: Young Gun
authors.initials: YG
authors.lastname: Ko
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea; Department of Energy and Environmental Engineering, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 305-350, Republic of Korea.
authors.forename: Taegu
authors.initials: T
authors.lastname: Do
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea; Department of Bio-Micro System Technology, College of Engineering, Korea University, 146 Anam-ro, Seongbuk-gu, Seoul 136-701, Republic of Korea.
authors.forename: Youngsang
authors.initials: Y
authors.lastname: Chun
authors.affiliation: Center for Bionics, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea.
authors.forename: Choong Hyun
authors.initials: CH
authors.lastname: Kim
authors.affiliation: Center for Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea. Electronic address: uschoi@kist.re.kr.
authors.forename: Ung Su
authors.initials: US
authors.lastname: Choi
authors.affiliation: Department of Environmental Engineering, Chungbuk National University, 1 Chungdae-ro, Seowon-gu, Cheongju, Chungbuk 362-763, Republic of Korea. Electronic address: jykim4@chungbuk.ac.kr.
authors.forename: Jae-Yong
authors.initials: JY
authors.lastname: Kim
keywords: Adsorbent; CeO(2); CePO(4); Nanofiber; Phosphate removal