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Different salinities water characterization by DSC-cooling

Research paper by Lidiane Pinto Correia, Elisana Afonso de Moura, Hallisson Meneses Pires, Rui Oliveira Macêdo

Indexed on: 16 Apr '11Published on: 16 Apr '11Published in: Journal of Thermal Analysis and Calorimetry



Abstract

Water is a fundamental element of life. Its multiple uses are indispensable for a wide spectrum of human activities. This study aims to characterize water from different salinities obtained in the Cariri region of Paraíba, Brazil. The samples were analyzed using the DSC-coupled to the Peltier system (DSC-Cooling) and physical–chemical water tests performed employing reactive kits, using the Spectroquant Merck® specific for each test. The calorimetric curves showed crystallization phase transitions with different characteristics in peak format and crystallization temperatures between the samples of different salinities. The calorimetric data obtained in the process of crystallization of water is directly correlated to the physico-chemical parameters of conductivity and total dissolved solids, showing that the analytical technology DSC-cooling/heating is suitable for characterization of different salinities water.