摘要
采用ｐＨ滴定法研究风化煤ＦＡ和发酵法ＦＡ与金属离子的络合能力，给出了相应的ｐＨ滴定曲线，获得了７种金属离子与两种不同来源ＦＡ络合倾向的大小顺序，即：Ｍｇ２＋＜Ｃｏ２＋＜Ｎｉ２＋＜Ｚｎ２＋＜Ｃｕ２＋＜Ａｌ３＋＜Ｆｅ３＋。其中Ｆｅ３＋具有最大的形成络合物的倾向，而这种倾向是以酸度增加为基础的，最后边的金属离子具有最大的酸度。
\ The complex ability between the two kinds of FA and metallic cations are studied by pH titrate. The pH titrate curves are given.The order of the complex ability between the two kinds of FA and the seven kinds of metallic cations are found to be Mg 2+ <Co 2+ <Ni 2+ <Zn 2+ <Cu 2+ <Al 3+ <Fe 3+ . The Fe 3+ has the strongest complex ability and acidity among the seven kinds of metallic cations. [
出处
《北京联合大学学报》
CAS
1997年第2期46-50,共5页
Journal of Beijing Union University
