飲料水の衛生学的研究(第2報)給水材料ガラス繊維強化プラスチックからの有機物質の溶出と溶出物質による遊離塩素の消失

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In order to elucidate the effect of fiber reinforced plastics (FRP) for water works on the water quality, the time course of elution of organic matters from FRP test pieces was investigated and the free available chlorine consumption by test pieces was also studied. Total organic carbon (TOC) of the water, in which test pieces were immersed, was regarded as the amount of organic matters eluted from test pieces to water. The amount eluted to distilled water was propotional to the surface area of test pieces, and entirely dependent on the water temperature. The similar tendency was observed in the amount of styrene contained in the eluted organic matters. Gel filtration of the eluate showed that the organic matter contained high molecular weight substances. The organic matter was also eluted from the test pieces which had been washed with tap water during 12 months. The chlorine had no effect on the elution profile of organic matters from test pieces. The time course of elution of styrene, however, showed a time lag in the presence of chlorine. The styrene reacted with the chlorine in water and the product was 1-phenyl-2-chloroethanol. The chlorine consumption by test pieces, however, was not able to be estimated by the amount of eluted styrene. A linear relationship existed between the decrease of chlorine and the square root of time. Its slope was propotional to the initial concentration of chlorine and the surface area of test pieces. The chlorine consumption by test pieces could be explained by the assumption that the diffusion of chlorine into the interface between test pieces and water was the rate-determining step.
公益社団法人日本薬学会の論文
1981-10-31

飲料水の衛生学的研究(第2報)給水材料ガラス繊維強化プラスチックからの有機物質の溶出と溶出物質による遊離塩素の消失

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