Release of hydroxyl ions during specific adsorption of chloride by variable‐charge soils | Zendy

Wang J. H. | Zendy; Yu T. R. | Zendy

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Release of hydroxyl ions during specific adsorption of chloride by variable‐charge soils

Author(s) -

Wang J. H.,

Yu T. R.

Publication year - 1998

Publication title -

zeitschrift für pflanzenernährung und bodenkunde

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.644

H-Index - 87

eISSN - 1522-2624

pISSN - 0044-3263

DOI - 10.1002/jpln.1998.3581610205

Subject(s) - adsorption , chemistry , soil water , chloride , ion , inorganic chemistry , suspension (topology) , red soil , organic chemistry , soil science , geology , mathematics , homotopy , pure mathematics

The release of hydroxyl ions during specific adsorption of chloride by variable‐charge soils of China was studied by comparing the difference in pH of the suspension between a HCl‐treated system and a HNO 3 −treated system. A difference occurred only for the variablecharge soils, but not for the permanent‐charge soil. The release of OH − ions decreased upon removal of free iron oxides. The quantity of released OH was larger for electrodialyzed soils than that for untreated soils. It was less than 10% of the amount of Cl added. The OH/CI ratioincreased with increasing addition of HCl, suggesting that more OH relative to H 2 O was replaced by CI.

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