摘要
为研究环丙酰草胺在土壤中的吸附迁移规律,分别采用批平衡法和柱淋溶法测定了环丙酰草胺在江西红壤、太湖水稻土、常熟乌杉土、陕西潮土和东北黑土5种土壤中的吸附和淋溶特性,并运用数学模型对其在土壤中的吸附及迁移特性进行了分析。结果表明:环丙酰草胺在5种土壤中的等温吸附曲线符合线性吸附方程,吸附常数K_d在1.41~7.08之间;环丙酰草胺在5种土壤中的淋溶性大小依次为:东北黑土>陕西潮土>常熟乌杉土>太湖水稻土>江西红壤。通过对吸附常数Kd与土壤有机质含量和pH值的关系进行分析,发现土壤pH值在吸附过程中属主要因素,Kd与土壤pH值呈负相关。上述结果表明,环丙酰草胺在供试的5种土壤中比较容易迁移,影响其迁移的主要因素是土壤pH值。环丙酰草胺在使用过程中应关注其对地表水和地下水造成的风险。
In order to evaluate the ecological safety of cyclanilide in soil environment, the adsorption and leaching behavior of cyclanilide in soils was conducted by the batch equilibration techniques. Data were analyzed using mathematic models to describe the characteristic mechanism of adsorption and the shift of cyclanilide in soils. The results showed that the adsorption isotherms of cyclanilide was well described by linear equation.The adsorption values K_d of cyclanilide in 5 types of soils ranged from1.41-7.08. The order of the mobilities of cyclanilide in different soils was as follows: Dongbei black soil > Shaanxi tide soil > Changshu wushan soil > Taihu paddy soil > Jiangxi red soil. It was found that the Kd value decreased with the increase of the pH value of soil. The simple linear correlations were regressed between OM, soils pH value and the value of adsorption coefficient(Kd), which indicated that the soil pH value was the dominating factor influencing the cyclanilide retention in all the systems. The mobilities of cyclanilide in 5 types of tested soils were high. Therefore, attention should be paid to the risk to surface water and groundwater by the use of cyclanilide.
作者
何健
李菊颖
豆叶枝
倪妮
张悦清
吴文铸
张爱国
单正军
HE Jian;LI Juying;DOU Yezhi;NI Ni;ZHANG Yueqing;WU Wenzhu;ZHANG Aiguo;SHAN Zhengjun(Nanjing Institute of Environmental Sciences,Ministry of Ecology and Environment,Key Laboratory of Pesticide Environmental Assessment and Pollution Control,Nanjing 210042,China)
出处
《农药学学报》
CAS
CSCD
北大核心
2020年第4期721-726,共6页
Chinese Journal of Pesticide Science
基金
国家重点研发计划(2016YFD0200201)
江苏省自然科学基金(BK20190141).
关键词
环丙酰草胺
土壤
吸附
淋溶
迁移
cyclanilide
soil
adsorption
leaching
migration
