Seasonal and spatial trend of pollutants in the waters of the São José do Rio Preto municipal dam, São Paulo state, Brazil

Química Nova

Melo, Camila de Almeida¹  Bisinoti, Márcia Cristina¹  Universidade Estadual Paulista Júlio de Mesquita Filho, São José do Rio Preto, Brasil¹  Moreira, Altair B.¹ 

关键词: Preto river;    seasonal and spatial trends;    pollutants.;   

DOI  :  10.1590/S0100-40422009000600014

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

In this manuscript, seasonal and spatial trends of water collected from two sampling places in the Preto River in the Turvo-Grande watershed were evaluated. Water samples were collected during June/07 to July/08 and parameters sulphate, total organic carbon, ammonia, conductivity, dissolved oxygen, temperature, dissolved total solids and nitrate were quantified. Seasonal trend indicated sanitary effluents as a point source of contamination in both sampling points. Vertical trends demonstrated that the Municipal Dam was not stratified and received a diffuse source of pollutants from flooding and agriculture runoffs. It was also verified that there is relatively fast ammonia consumption kinetics having a half-life time of 1.43 h which can explain the low ammonia concentrations found in these aquatic bodies.

【 授权许可】

Unknown