Continuous Removal of Heavy Metals by the Lime Sulfurated Solution (Calcium Polysulfide) Process
スポンサーリンク
概要
- 論文の詳細を見る
A continuous wastewater treatment system was developed for the Lime Sulfurated Solution Process which had already been tested in a batch, stirred tank and ascertained to be an effective chemical precipitation process. The removability of heavy metals was investigated with the continuous treatment system, consisting of a plant composed of H<SUB>2</SUB>S desorber, reactor, thickener, sand filter, and H<SUB>2</SUB>S desorber. The sulfide ion dissolved in treated water was desorbed as H<SUB>2</SUB>S by a mixed gas of air and CO<SUB>2</SUB> and recycled in the reactor to precipitate heavy metals. It has been found that: (1) by the recycling use of H<SUB>2</SUB>S, the continuous treatment system can remove heavy metals with less coagulant than in the batch, stirred vessel, (2) desorption of the dissolved sulfide ion by the mixed gas decreases the sulfide ion concentration in the treated water below 0.2 ppb, and (3) the conditions for the removal of heavy metals can be detected immediately by a sulfide ion electrode meter.
- 公益社団法人 日本化学会の論文
著者
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Aratani Toshiro
Department Of Management And Information Sciences Hiroshima Prefectural University
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Yasuhara Shigeki
Department of Chemical Engineering, College of Engineering, University of Osaka Prefecture
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Matoba Hitoshi
Department of Chemical Engineering, College of Engineering, University of Osaka Prefecture
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Yano Takeo
Department of Chemical Engineering, College of Engineering, University of Osaka Prefecture
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