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Desalination of brackish water can constitute an opportunity for regional development, however, are necessary environmental impact assessments, because of its production of waste. The objective of the study is to characterize physical and chemically well water, the waste desalination and desalinated water in rural units of Mossoró RN. A total of 10 wells of brackish water that had water treatment for human food consumption through desalination by reverse osmosis. A sample was collected for each type of water at three different locations: well water, waste water and desalinated water desalination. The soil samples were collected at three different points, as follows: where effectively the waste was dumped and the desalination in two equidistant points from this (0.8 m 1.6 m), at an average depth of 0, 0-0.2 and 0.2-0.4 m. The chemical analyzes were: pH, PST, EC, Na, Ca, Mg, Al, SB, CTC and V. The data were analyzed by means of descriptive statistics, using the SPSS statistical software. It follows that all the water of the well tubular communities and especially those of the saline effluents showed some degree of limitation in excess salts and chlorine ion and toxicity for use in irrigation, need appropriate handling practices and using salinity tolerant crops. However, the desalted water is suitable for irrigation purposes.

CARACTERIZAÇÃO FÍSICO-QUÍMICA DA ÁGUA DE POÇO, DO REJEITO DA DESSALINIZAÇÃO E DA ÁGUA DESSALINIZADA MOSSORÓ – RN