title: Simultaneous removal of dissolved organic matter and bromide from drinking water source by anion exchange resins for controlling disinfection by-products.
abstract: Anion exchange resins (AERs) with different properties were evaluated for their ability to remove dissolved organic matter (DOM) and bromide, and to reduce disinfection by-product (DBP) formation potentials of water collected from a eutrophic surface water source in Japan. DOM and bromide were simultaneously removed by all selected AERs in batch adsorption experiments. A polyacrylic magnetic ion exchange resin (MIEX®) showed faster dissolved organic carbon (DOC) removal than other AERs because it had the smallest resin bead size. Aromatic DOM fractions with molecular weight larger than 1600 Da and fluorescent organic fractions of fulvic acid- and humic acid-like compounds were efficiently removed by all AERs. Polystyrene AERs were more effective in bromide removal than polyacrylic AERs. This result implied that the properties of AERs, i.e. material and resin size, influenced not only DOM removal but also bromide removal efficiency. MIEX® showed significant chlorinated DBP removal because it had the highest DOC removal within 30 min, whereas polystyrene AERs efficiently removed brominated DBPs, especially brominated trihalomethane species. The results suggested that, depending on source water DOM and bromide concentration, selecting a suitable AER is a key factor in effective control of chlorinated and brominated DBPs in drinking water.
authors: Department of Urban Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan. Electronic address: phetrak@env.t.u-tokyo.ac.jp.
authors: Athit
authors: A
authors: Phetrak
authors: Department of Urban Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
authors: Jenyuk
authors: J
authors: Lohwacharin
authors: Department of Urban Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
authors: Hiroshi
authors: H
authors: Sakai
authors: Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan.
authors: Michio
authors: M
authors: Murakami
authors: Department of Urban Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
authors: Kumiko
authors: K
authors: Oguma
authors: Department of Urban Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.
authors: Satoshi
authors: S
authors: Takizawa
mesh_terms: D000837:Anion Exchange Resins / Q000737:chemistry*; D001965:Bromides / Q000302:isolation & purification*; D054879:Halogenation; D009930:Organic Chemicals / Q000302:isolation & purification*; D022882:Trihalomethanes / Q000302:isolation & purification*; D018508:Water Purification
chemical_list: D000837:Anion Exchange Resins; D001965:Bromides; D009930:Organic Chemicals; D022882:Trihalomethanes
keywords: adsorption; dissolved organic carbon; drinking water treatment; ion exchange