Ye C M, Lei Z F, Wang X J, Gong A J, Zheng H H
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
J Environ Sci (China). 2001 Oct;13(4):466-71.
The application of atrazine in China during the last ten years has led to some environmental problems. In this paper, the multimedia model of atrazine in soil-plant-groundwater system at Baiyangdian Lake area in Northern China was established using a fugacity approach, and verified with observed values. The model involved 7 environmental compartments which are air, groundwater, soil, corn roots, corn stem, corn leaf and kernel of corn. The results showed that the relative errors between calculated and observed values have a mean value of 24.7%, the highest value is 48% and the lowest value is 1.4%. All these values indicated that this multimedia model can be used to simulate the environmental fate of atrazine. Both the calculated and observed values of concentrations of atrazine in plant compartments are in the following order: in corn roots > in corn stem > in kernel of corn > in corn leaf, it exhibited a good regularity. The prediction results indicated that concentrations of atrazine in the groundwater and kernel of corn will override the limitation of 3 micrograms/L and 0.05 mg/kg respectively.
过去十年中阿特拉津在中国的应用引发了一些环境问题。本文采用逸度方法建立了中国北方白洋淀地区土壤-植物-地下水系统中阿特拉津的多介质模型，并与实测值进行了验证。该模型涉及7个环境单元，即空气、地下水、土壤、玉米根、玉米茎、玉米叶和玉米粒。结果表明，计算值与实测值之间的相对误差平均值为24.7%，最高值为48%，最低值为1.4%。所有这些值表明该多介质模型可用于模拟阿特拉津的环境归趋。植物单元中阿特拉津浓度的计算值和实测值均呈以下顺序：玉米根中＞玉米茎中＞玉米粒中＞玉米叶中，呈现出良好的规律性。预测结果表明，地下水中和玉米粒中阿特拉津的浓度将分别超过3微克/升和0.05毫克/千克的限值。
