Fundamental Study on Desalination Treatment of Anions in Seawater with AgNO<sub>3</sub> and Pb (NO<sub>3</sub>)<sub>2</sub>

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  • WAJIMA Takaaki
    Department of Engineering in Applied Chemistry, Faculty of Engineering and Resource Sciences, Akita Univeristy
  • SHIMIZU Tomoe
    Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University
  • YAMATO Takehiko
    Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University
  • IKEGAMI Yasuyuki
    Institute of Ocean Energy, Saga University

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Other Title
  • AgNO<sub>3</sub>およびPb(NO<sub>3</sub>)<sub>2</sub>を用いた海水中の陰イオン処理に関する基礎的研究
  • AgNO3およびPb(NO3)2を用いた海水中の陰イオン処理に関する基礎的研究
  • AgNO3 オヨビ Pb NO3 2 オ モチイタ カイスイチュウ ノ インイオン ショリ ニ カンスル キソテキ ケンキュウ
  • Fundamental Study on Desalination Treatment of Anions in Seawater with AgNO3 and Pb (NO3)2

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Abstract

We examined the desalination treatment of seawater using AgNO3 and Pb(NO3)2 for the removal of anions, such as Cl-, Br-, and SO42-. AgNO3 could remove Br- and Cl- from seawater, while Pb(NO3)2 could remove SO42-, Br- and Cl-. The pH of solution treated with AgNO3 was constant at pH 8.1, but the pH of the solution treated with Pb (NO3)2 decreased to acidic. The reactions of AgNO3 and Pb(NO3)2 with anions in seawater were rapid. Regardless of temperature of seawater, the time for anion removal by AgNO3 was almost same, while that by Pb(NO3)2 delayed with decreasing temperature of seawater.

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