Pollution of water by herbicides used in the irrigated rice cultivation in the central area of Rio Grande do Sul state, Brazil: theoretical prediction and monitoring

Química Nova

Fundação Universidade Federal do Rio Grande, Rio Grande¹  Primel, Ednei Gilberto¹  Marchezan, Enio¹  Gonçalves, Fábio Ferreira¹  Zanella, Renato¹  Universidade Federal de Santa Maria, Santa Maria¹  Machado, Sérgio de Oliveira¹  Kurz, Márcia Helena Scherer¹ 

关键词: herbicides;    water pollution;    irrigated rice fields.;   

DOI  :  10.1590/S0100-40422005000400010

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This article presents an evaluation of the pollution of river water by herbicides used in the culture of irrigated rice in Rio Grande do Sul State, Brazil. Firstly, a theoretical evaluation was made using the approaches suggested by EPA-USA, the "Groundwater Ubiquity Score" index and the Goss method to estimate the pollution possibilities. Afterwards, a monitoring program was established for the rivers of the area from 2001 to 2003 to investigate the presence of herbicide residues. The results indicate that the herbicides clomazone and propanil are the ones with larger presence and frequency in the analyzed samples. The theoretical forecast was confirmed by the results of the monitoring program.

【 授权许可】

Unknown