引用本文:
潘竟军, 杨冠英, 赵扬, 韩布兴, 闫海科. 量热研究铝与钠蒙脱土交换反应[J]. 物理化学学报,
1998, 14(06): 569-572.
doi:
10.3866/PKU.WHXB19980617
Citation: Pan Jing-Jun, Yang Guan-Ying, Zhao Yang, Han Bu-Xing, Yan Hai-Ke. Calorimetric Investigation for Exchange Reaction of Aluminum with Na-montmorillonite[J]. Acta Physico-Chimica Sinica, 1998, 14(06): 569-572. doi: 10.3866/PKU.WHXB19980617
Citation: Pan Jing-Jun, Yang Guan-Ying, Zhao Yang, Han Bu-Xing, Yan Hai-Ke. Calorimetric Investigation for Exchange Reaction of Aluminum with Na-montmorillonite[J]. Acta Physico-Chimica Sinica, 1998, 14(06): 569-572. doi: 10.3866/PKU.WHXB19980617
English
Calorimetric Investigation for Exchange Reaction of Aluminum with Na-montmorillonite
Abstract:
Exchange enthalpies of aluminum with Na-montmorillonite suspension are determined at 3O3.15K and PH=3, and 4, using titration calorimetry and the exchange reaction mechanism are further studied by combining calorimetric results and exchange isotherm determined by static method. The adsorption of aluminum on Na-montmorillonite is endothermic, and therefore exchange reaction is a process driven by entropy. X-ray diffraction patterns of montmorillonite saturated by Na+ and Al3+ are determined at wet and dry state respectively. The results show Al3+ adsorbed on the clay can dramatically reduce the expansion of montmorillonite because Al3+prevents osmotic swelling.
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Key words:
-
Aluminum
- / Montmorillonite
- / Exchange enthalpy
- / Titration calorimetry
- / X-ray diffraction
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