Removal of phosphates from aqueous solution by active charcoal electrode.

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概要

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• The electrolytic removal of phosphoric acid and mono-, di-, and tripotassium phosphates from aqueous solution was attemped using improved active charcoal electrodes which proved more effective in removing these electrolytes than the previous one. The degree of removal of phosphoric acid and phosphates exceeded 90% after 80 min's electrolysis, tending to 100% after sufficient time of electrolysis. The mechanism of removal of phosphoric acid and potassium phosphates was confirmed to be the entrapment and concentration of these substances as potassium hydroxide and phosphoric acid in the pores of the active charcoal. The processes of removal of phosphoric acid and phosphates were found to be complicated due to hydrogen and hydroxide ions formed by the dissociation of phosphoric acid and hydrolysis of phosphates respectively which explained the initial rate of removal of these substances decreasing in the order of phosphoric acid through potassium dihydrogen- to tripotassium phosphate. Regeneration of active charcoal electrode was further inferred.

• 公益社団法人 日本化学会の論文

著者

• Ichinose Masao

  Department Of Chemistry Faculty Of Science Tokai University

• Yasuoka Takashi

  Department Of Cardiovascular Surgery Kansai Rousai Hospital

• Mitsuzawa Shunmei

  Department Fo Chemistry Faculty Of Science Tokai University

• Sasaki Tsunetaka

  Department of Chemistry Faculty of Science Tokyo Metropolitan University

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