Control of salt concentration of soil solution by the addition of synthetic hydrotalcite

Shin-Ichiro Wada, Kinya Masuda, Kinya Masuda

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

Hydrotalcite (HT) is a unique Mg-Al hydroxide mineral having excess surface positive charge. Because of its high selectivity for carbonate ion, the positive surface charge is mostly neutralized by adsorbing carbonate ion under CO2containing atmosphere. Since the adsorbed carbonate is essentially exchangeable, anion exchange reactions with other anions, e.g. nitrate, Y2CO3+2NO3-= 2YNO3+ CO3 2(1) take place depending on the concentrations of nitrate and carbonate in the milieu. In Eq. 1, Y is a fraction of HT carrying a unit positive charge. If the coexisting cation is calcium the reaction in Eq. 1 will advance to a larger extent because of the elimination of released carbonate as calcium carbonate and, as a result, the salt concentration in a bathing solution will decrease.

本文言語英語
ページ(範囲)377-381
ページ数5
ジャーナルSoil Science and Plant Nutrition
41
2
DOI
出版ステータス出版済み - 1 1 1995

All Science Journal Classification (ASJC) codes

  • 土壌科学
  • 植物科学

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