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. Experime...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.展开更多
In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized b...In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25℃, 45℃ and 65℃, the results indicated that when the temperature was 65℃, the removal efficiency of the oil and COD was the best, which was 87.2% and 92.6% respectively. Then by comparisons among rectorite (REC), PSFA and the composite PSFA-REC at the temperature of 65℃ and the optimal dosage of 11 mg/L, the composite PSFA-REC showed better flocculation performance than flocculant REC and PSFA alone.展开更多
文摘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.
文摘In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25℃, 45℃ and 65℃, the results indicated that when the temperature was 65℃, the removal efficiency of the oil and COD was the best, which was 87.2% and 92.6% respectively. Then by comparisons among rectorite (REC), PSFA and the composite PSFA-REC at the temperature of 65℃ and the optimal dosage of 11 mg/L, the composite PSFA-REC showed better flocculation performance than flocculant REC and PSFA alone.
