A role for calcium hydroxide and dolomite in water: acceleration of the reaction under ultraviolet light

Chemosphere
Hiroyasu NagaseMasaya Kawase

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.

References

Nov 1, 1979·Steroids·K M Lewis, R D Archer
Jan 19, 2000·Journal of Agricultural and Food Chemistry·L CoxJ Cornejo
Dec 2, 2000·Chemosphere·T YamamotoO Nakasugi
Jul 3, 2002·Water Research·Shosaku KashiwadaYasumoto Magara
Sep 13, 2005·Environmental Toxicology and Chemistry·Takashi HirookaZazumasa Hirata
Oct 20, 2005·Journal of Bioscience and Bioengineering·Takashi HirookaKazuhisa Miyamoto
Dec 6, 2005·Journal of Hazardous Materials·Marianna Czaplicka

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