摘要
本文研究铁键、铝键、钙键复合体与溶液中Ca2＋、Fe3＋、Al3＋金属离子的相互作用。结果显示，复合体上键合的Fe3＋，不能被溶液中的Ca2＋、Al3＋置换，复合体上键合的Al3＋仅少量被Fe3＋、Ca2＋置换进入溶液，复合体上键合的Ca2＋则可较多地被Al3＋、Fe3＋置换进入溶液，置换的量与pH及粘土矿物类型有一定关系，尽管复合体上键合的Fe3＋、Al3＋、Ca2＋等难以被置换，但溶液中的Ca2＋、Fe3＋、Al3＋等金属离子仍可与胶体络合。
The reaction of synthesized Ca-bound, Fe-bound, and Al-bound organo-mineral complexes with Ca2+, Fe3+, and Al3+ ions in solution, respectively, was studied. The results showed that the Ca2+ or Al3+ in solution could not exchange the bound-Fe in complex, the Ca2+ or Fe3+ in solution could exchange little bound-Al in complex, and Fe3+ or A13+ in solution could exchange more bound-Ca in complex. However,the exchangeable capacity was related to pH in solution and type of clay minerals. Although the bound ions in complexes were hardly exchanged, the Ca2+, Fe3+, or Al3+ in soluhon could complex with organo-mineral complexes.
出处
《土壤学报》
CAS
CSCD
北大核心
1999年第4期470-476,共7页
Acta Pedologica Sinica
基金
国家自然科学基金!39470411
39670421
浙江省自然科学基金!496027
关键词
土壤
有机矿质复合体
复合体转化
Ca-bound organo-mineral complexes, Fe, Al-bound organo-mineral complexes, Humus, Transformation
