期刊名称：Revista Internacional de Contaminación Ambiental
印刷版ISSN：0188-4999
出版年度：2013
卷号：29
期号：0
页码：65-84
语种：Spanish
出版社：Centro de Ciencias de la Atmósfera
摘要：The herbicide atrazine is being used for weed control in crops and also in nonagricultural areas. It is one of the most commonly used herbicides worldwide, presents variable biodegradation rates and has been detected in both surface water and groundwater systems. Because this herbicide is associated with relatively high chronic toxicity, accumulation potential and persistence in surface water and groundwater, the use of this herbicide has been restricted in the United States and prohibited in several countries of the European Community. In Mexico, the use of atrazine is not regulated and it is being widely used in agricultural areas. Since this herbicide has been detected in both surface water and groundwater and in concentrations higher than the recommended limits for drinking water, we have reviewed the mechanisms of natural attenuation of this herbicide, especially in agricultural areas, to decide upon the need for implementing regulation measures. Mexican water quality regulations provide limits for some pesticides but these do not include limits for atrazine. However, the use of atrazine in agricultural areas may represent a risk to contaminate water by transport of the herbicide or its degradation products to water bodies. To inquire about the need to regulate the use of atrazine in Mexico, this paper presents the results of natural attenuation of atrazine in Mexican agricultural areas, obtained through a research program carried out at the Mexican Institute of Water Technology (IMTA), with the support of graduate students from the Engineering and Earth Sciences Graduate Programs of the Mexican National Autonomous University (UNAM). In this paper we review the literature to provide information on the legal framework for uses of atrazine, the transport and natural attenuation mechanisms of the herbicide, the risks of contaminating water, and we discuss the necessity to restrict the use of this herbicide or to regulate concentrations in water and how farming practices should be modified to protect surface water and groundwater.
其他摘要：The herbicide atrazine is being used for weed control in crops and also in nonagricultural areas. It is one of the most commonly used herbicides worldwide, presents variable biodegradation rates and has been detected in both surface water and groundwater systems. Because this herbicide is associated with relatively high chronic toxicity, accumulation potential and persistence in surface water and groundwater, the use of this herbicide has been restricted in the United States and prohibited in several countries of the European Community. In Mexico, the use of atrazine is not regulated and it is being widely used in agricultural areas. Since this herbicide has been detected in both surface water and groundwater and in concentrations higher than the recommended limits for drinking water, we have reviewed the mechanisms of natural attenuation of this herbicide, especially in agricultural areas, to decide upon the need for implementing regulation measures. Mexican water quality regulations provide limits for some pesticides but these do not include limits for atrazine. However, the use of atrazine in agricultural areas may represent a risk to contaminate water by transport of the herbicide or its degradation products to water bodies. To inquire about the need to regulate the use of atrazine in Mexico, this paper presents the results of natural attenuation of atrazine in Mexican agricultural areas, obtained through a research program carried out at the Mexican Institute of Water Technology (IMTA), with the support of graduate students from the Engineering and Earth Sciences Graduate Programs of the Mexican National Autonomous University (UNAM). In this paper we review the literature to provide information on the legal framework for uses of atrazine, the transport and natural attenuation mechanisms of the herbicide, the risks of contaminating water, and we discuss the necessity to restrict the use of this herbicide or to regulate concentrations in water and how farming practices should be modified to protect surface water and groundwater.
关键词：legal framework; environmental fate and transport; chemical degradation; biodegradation; photolysis; adsorption; natural attenuation;marco legal; transporte y destino ambiental; degradación química; biodegradación; fotólisis; adsorción; atenuación natural
其他关键词：legal framework; environmental fate and transport; chemical degradation; biodegradation; photolysis; adsorption; natural attenuation
