title: A role for calcium hydroxide and dolomite in water: acceleration of the reaction under ultraviolet light.
abstract: Organic environmental pollutants are now being detected with remarkably high frequency in the aquatic environment. Photodegradation by ultraviolet light is sometimes used as a method for removing organic chemicals from water; however, this method is relatively inefficient because of the low degradation rates involved, and more efficient methods are under development. Here we show that the removal of various organic pollutants can be assisted by calcined dolomite in aqueous solution under irradiation with ultraviolet light. It was possible to achieve substantial removal of bisphenol A, chlorophenols, alkylphenols, 1-naphthol and 17β-estradiol. The major component of dolomite responsible for the removal was calcium hydroxide. Our results demonstrate that the use of calcium hydroxide with ultraviolet light irradiation can be a very effective method of rapidly removing organic environmental pollutants from water. This is a new role for calcium hydroxide and dolomite in water treatment.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan; Climate Service Center, Helmholtz-Zentrum Geesthacht, 1 Fischertwiete, Hamburg 20095, Germany. Electronic address: nagase@phs.osaka-u.ac.jp.
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Nagase
authors.affiliation: Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan. Electronic address: hidekazu0222@peace.ocn.ne.jp.
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Tsujino
authors.affiliation: Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Kurihara
authors.affiliation: Environmental System Research Institute, 6-1-14 Minamikasugaoka, Ibaraki, Osaka 567-0046, Japan. Electronic address: sa110@osaka.zaq.jp.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Saito
authors.affiliation: Nagahama Institute of Bio-Science and Technology, 1266 Tamura, Nagahama, Shiga 526-0829, Japan. Electronic address: m_kawase@nagahama-i-bio.ac.jp.
authors.forename: Masaya
authors.initials: M
authors.lastname: Kawase
mesh_terms: D001559:Benzhydryl Compounds / Q000737:chemistry / Q000528:radiation effects; D002119:Calcium Carbonate / Q000737:chemistry*; D002126:Calcium Hydroxide / Q000737:chemistry*; D002733:Chlorophenols / Q000737:chemistry / Q000528:radiation effects; D008274:Magnesium / Q000737:chemistry*; D009284:Naphthols; D009930:Organic Chemicals / Q000737:chemistry / Q000528:radiation effects; D010636:Phenols / Q000737:chemistry / Q000528:radiation effects; D010782:Photolysis; D014466:Ultraviolet Rays; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D002119:Calcium Carbonate; D002126:Calcium Hydroxide; D002733:Chlorophenols; D008274:Magnesium; D009284:Naphthols; D009930:Organic Chemicals; D010636:Phenols; D014867:Water; D014874:Water Pollutants, Chemical; C029350:1-naphthol; C006780:bisphenol A; D000098826:Bisphenol A Compounds; C028042:calcium magnesium carbonate
keywords: Alkylphenol; Associated water; Bisphenol A; Calcium hydroxide; Chlorophenol; Ultraviolet light