摘要
从理论上讨论了土壤硒的价态及其溶解性 ,土壤溶液中不同形态的硒的溶解平衡与可能存在的 Se( )的变价反应 ,土壤溶液中硒的价态转换的影响因素 ,特别是氧化还原电位与 p H对淹水土壤溶液中硒的价态变换的影响 .并推导出 Se的价态转换的 p H- Eh图 ,根据 p H- Eh图 ,可以预测土壤溶液中硒的价态变换与 p H-
The valence state and solubility of selenium in paddy soils, the dissolution equilibria of selenium and the valence changes of selenate in soil solution, the influences of redox potential and pH value on valence changes of selenium are discussed theoretically. A characteristic pH-Eh relationship is derived.The relationship between the valence changes of selenium and pH Eh insoil solution can be calculated on the basis of pH Eh of selenium.
出处
《湖南农业大学学报(自然科学版)》
CAS
CSCD
北大核心
2001年第2期139-142,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家自然科学基金资助项目! (396 70 42 4)
关键词
土壤溶液
硒
氧化-还原电位
溶解性
PH值
soil solution
selsnium
valence state
oxidation reduction potential