Aplicação de um método biológico no estudo da toxicidade aguda nas águas de fábrica da empresa Texlom e parte do Rio Matola

Abstract

In this study, a practical application of a biological test for acute water toxicity was carried out. The species used in the test was Allium cepa L. (common onion). As an object of study, the liquid discharges from the textile factory TEXLOM and the portion of the Matola river most directly under their influence were used. Thus, during the period from December 20, 1990 to May 31, 1991, 8 samples were taken from discharges from the TEXLOM factory and 11 samples from the river (subdivided into three points). The tests carried out showed that all samples from the factory discharges had a level of toxicity that could be considered potentially harmful to the environment. Tests carried out in the river waters noted that these discharges have a notable impact on the Matola River up to approximately 200 meters from the factory discharge, towards the estuary. In evaluating the biological test applied in this study, it is concluded that it is practical and applicable to the conditions of our country. (TRADUÇÃO NOSSA)