title: Arsenic(V) removal using an amine-doped acrylic ion exchange fiber: Kinetic, equilibrium, and regeneration studies.
abstract: This study investigates As(V) removal from aqueous solutions using a novel amine-doped acrylic ion exchange fiber. The amine doping reaction was confirmed using FT-IR, and the surface of the fiber was characterized using FEG-SEM. The synthesis process was completed within 60min using an AlCl3·6H2O catalyst at 100°C, and the resulting in a fiber with an ion exchange capacity of 7.5meq/g. The removal efficiency of the A-60 fiber was affected by the solution pH, and the efficiency was optimum at pH 3.04. As(V) adsorption on the fiber was rapid in the first 20min and reached equilibrium in 60min. As(V) removal followed pseudo-first-order kinetics, and the Redlich-Peterson adsorption isotherm model provided the best fit of the equilibrium data. The fiber has an As(V) adsorption capacity (qe) of 205.32±3.57mg/g, which is considerably higher than literature values and commercial adsorbents. The removal efficiency of the fiber was above 83% of the initial value after nine regeneration cycles.
authors.affiliation: Civil and Environmental Engineering, Rice University, Houston, TX, 77005, United States.
authors.forename: Chang-Gu
authors.initials: CG
authors.lastname: Lee
authors.affiliation: Civil and Environmental Engineering, Rice University, Houston, TX, 77005, United States.
authors.forename: Pedro J J
authors.initials: PJJ
authors.lastname: Alvarez
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea.
authors.forename: Aram
authors.initials: A
authors.lastname: Nam
authors.affiliation: Department of Bioresources and Rural System Engineering, Hankyong National University, Anseong, Republic of Korea.
authors.forename: Seong-Jik
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Center for Urban Energy Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea.
authors.forename: Taegu
authors.initials: T
authors.lastname: Do
authors.affiliation: Center for Urban Energy Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea.
authors.forename: Ung-Su
authors.initials: US
authors.lastname: Choi
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 136-791, Republic of Korea; Graduate School of Convergence Green Technology and Policy, Korea University, Anam-ro 145, Seongbuk-gu, Seoul, 136-701, Republic of Korea. Electronic address: yisanghyup@kist.re.kr.
authors.forename: Sang-Hyup
authors.initials: SH
authors.lastname: Lee
keywords: Adsorption; Amine group; Arsenic removal; Ion exchange fiber; Regeneration