With the technology of IR spectrum and crystal morphology,studying the effect on interatomic bonding action and molecular shape of coagulating agent PASC when it is prepared by various methods.It shows that as PASC is...With the technology of IR spectrum and crystal morphology,studying the effect on interatomic bonding action and molecular shape of coagulating agent PASC when it is prepared by various methods.It shows that as PASC is produced by basifying polymerization,comparing to that by others way,the IR spectrum of PASC shows,965cm -1 peak proportion reflecting Si O Al bond accrete 118%,266%,875cm -1 peak proportion reflecting Al O Al bond accrete 23%,30%.It may be caused by multinuclear hydroxy aluminum’s content and Zeta electric potential increases in the process hydrolyze concrete with PASC.It disappear in crystal morphology,molecular chain is longer and branching further,so that PASC have better potentiality of arching and charge neutralization.展开更多
Poly(aluminum chloride)(PAC) solutions of different basicity were prepared from pure aluminum foil and hydrochloric acid. Aluminum species were investigated by 27Al NMR spectroscopy and the tridecameric polycation Al ...Poly(aluminum chloride)(PAC) solutions of different basicity were prepared from pure aluminum foil and hydrochloric acid. Aluminum species were investigated by 27Al NMR spectroscopy and the tridecameric polycation Al 13 was detected. With the increase of PAC′s basicity, the molar ratio of Al 13 to Al m in PAC increases. The jar tests with kaolin water and water from Huangpu River at the same PACs dosage showed that the more basicity and content of Al 13, the more effective the coagulation effect on water with middle-high turbidity, while only less effect of the basicity was observed on water with low turbidity.展开更多
文摘With the technology of IR spectrum and crystal morphology,studying the effect on interatomic bonding action and molecular shape of coagulating agent PASC when it is prepared by various methods.It shows that as PASC is produced by basifying polymerization,comparing to that by others way,the IR spectrum of PASC shows,965cm -1 peak proportion reflecting Si O Al bond accrete 118%,266%,875cm -1 peak proportion reflecting Al O Al bond accrete 23%,30%.It may be caused by multinuclear hydroxy aluminum’s content and Zeta electric potential increases in the process hydrolyze concrete with PASC.It disappear in crystal morphology,molecular chain is longer and branching further,so that PASC have better potentiality of arching and charge neutralization.
文摘Poly(aluminum chloride)(PAC) solutions of different basicity were prepared from pure aluminum foil and hydrochloric acid. Aluminum species were investigated by 27Al NMR spectroscopy and the tridecameric polycation Al 13 was detected. With the increase of PAC′s basicity, the molar ratio of Al 13 to Al m in PAC increases. The jar tests with kaolin water and water from Huangpu River at the same PACs dosage showed that the more basicity and content of Al 13, the more effective the coagulation effect on water with middle-high turbidity, while only less effect of the basicity was observed on water with low turbidity.
