フェントン試薬によるドデシルベンゼンスルホン酸ナトリウムの除去
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概要
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Removal of sodium dodecylbenzene sulfonate (DBS) with Fentons reagent was done in not too much dilute solution. It was observed that DBS was removed mainly by adsorption on ferric hydroxide floc at relatively higher concentration of ferrous salt, but oxidative decomposition of DBS was dominant at lower concentration of ferrous salt. When the pH after reaction was about 3, DBS was removed most effectively.<BR>Further, heat of reaction between DBS and Fentons reagent was measured in dilute solution by using a microcalorimeter, and also heat of reaction of ferrous sulfate with hydrogen peroxide was measured by the same method. Effect of pH on the heat of reaction was remarkable for the former reaction, and heat evolved was maximum at the optimum pH for removal of DBS. Also for the latter reaction, dependence of pH on the heat of reaction was pronounced and heat of reaction increased with decrease in pH. Generally, the pH dropped as reaction proceeded. For the former reaction, however, abnormally higher value of pH was observed in the optimum pH range for evolution of heat, and it was found that maximum rise of pH measured in the above range, maximum heat of reaction, and minimum hour required to get to the peak of curve for calorie evolved were realized when the almost same initial pH was used. Concerning the above two reactions, the effect of pH on the heat of reaction and the change of pH at elapse of reaction etc. were discussed.
- 社団法人 日本油化学会の論文