摘要
ＩｎｔｒｏｄｕｃｔｉｏｎＡｌｕｍｉｎｕｍｓａｌｔｓａｎｄｔｈｅｉｒｐｏｌｙｍｅｒｓａｒｅｗｉｄｅｌｙｕｓｅｄａｓｃｏａｇｕｌａｎｔｓｉｎｄｒｉｎｋｉｎｇｗａｔｅｒｔｒｅａｔｍｅｎｔ，ｗｈｉｃｈｒｅｓｕｌｔｓｉｎｍｏｒｅｒｅｓｉｄｕａｌａｌｕｍｉｎｕｍ...
Two kinds of complex polysilicate coagulants-polysilicate iron PSI and polysilicate ferric aluminum PSFA were prepared. The polymerization processes of PSI and PSFA were investigated under various conditions. Experimental results show that the molecular weight(M.W.) of polysilicic acid PS and the molar ratio of Fe 3+ to SiO 2 are two of the most important factors for preparing high effective coagulants PSI and PSFA. It is shown that PSI and PSFA are not only high effective, nontoxic and cheap coagulants, but also effective for decreasing the dosage of aluminum salt. The mechanism of coagulation of PSI and PSFA is also discussed in this paper.
