| 彭家慧,欧晓明,欧将,杨志富,吴道新.新农药三氟苯嘧啶在土壤中的吸附[J].农业环境科学学报,2019,38(10):2371-2376. |
| 新农药三氟苯嘧啶在土壤中的吸附 |
| Adsorption of a new insecticide triflumezopyrim on soils |
| 投稿时间：2019-03-18 |
| DOI：10.11654/jaes.2019-0291 |
| 中文关键词: 三氟苯嘧啶 吸附 自由能 土壤 |
| 英文关键词: Triflumezopyrim adsorption free energy soil |
| 基金项目:国家重点研发计划项目（2016YFD0300708）；国家自然科学基金项目（21572050，21672057） |
| 作者 | 单位 | E-mail | | 彭家慧 | 长沙理工大学化学与生物工程学院, 长沙 410114
湖南化工研究院国家农药创制工程技术研究中心, 长沙 410014
湖南加法检测有限公司, 长沙 410014 | | | 欧晓明 | 湖南化工研究院国家农药创制工程技术研究中心, 长沙 410014
湖南加法检测有限公司, 长沙 410014 | | | 欧将 | 湖南化工研究院国家农药创制工程技术研究中心, 长沙 410014
湖南加法检测有限公司, 长沙 410014 | | | 杨志富 | 湖南化工研究院国家农药创制工程技术研究中心, 长沙 410014
湖南加法检测有限公司, 长沙 410014 | | | 吴道新 | 长沙理工大学化学与生物工程学院, 长沙 410114 | daoxinwu@126.com |
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| 中文摘要: |
| 为杀虫剂三氟苯嘧啶合理使用准则的制定和环境安全性评价，本文选择湖南红壤、北京潮土和吉林黑土等3种代表性土壤，采用批量平衡法研究了三氟苯嘧啶在土壤中的吸附。试验结果表明：三氟苯嘧啶在土壤中的吸附可用Freundlich吸附等温方程很好地拟合，其在湖南红壤、北京潮土和吉林黑土中的吸附系数KF值分别为1.24、2.02和6.63，其ΔG变化绝对值分别为0.093、1.642和4.438，均小于10 kJ·mol-1，说明三氟苯嘧啶在土壤中的吸附以物理作用为主。三氟苯嘧啶在土壤中的吸附与土壤理化性质和药剂本身结构有关，其中以土壤有机质含量和黏粒含量对吸附的影响最显著，沙粒的影响次之，而土壤pH值和粉粒含量对吸附的影响最小，说明有机质含量和黏粒含量是三氟苯嘧啶在土壤中吸附的主导支配因素。 |
| 英文摘要: |
| Triflumezopyrim is a novel class of mesoionic insecticides discovered by DuPont Crop Protection, and registered for use on rice, vegetables, and fruits for control of insect pests. In order to provide a reference for setting of reasonable application guidelines and ecological risk assessment of the insecticide, adsorption of triflumezopyrim on three soils, the laterite from Hunan Province, fluvo-aquic soil from Beijing, and terra preta from Jilin Province was studied in the laboratory using high performance liquid chromatography(HPLC)with diode array detector(DAD)according to batch equilibrium method. The experimental results showed that there was a weak sorption of triflumezopyrim on soils. The adsorption isotherms of triflumezopyrim on soils can be described very well by Freudlich equation, and the adsorption coefficient(KF)of triflumezopyrim on the laterite, fluvo-aquic soil, and terra preta was 1.24, 2.02, and 6.63, respectively, and the adsorption free energy(ΔG)was 0.093, 1.642, and 4.438, respectively, indicating that the adsorption largely resulted from the physical adsorption, according to the pesticide environmental test guidelines of China. The adsorption coefficient KF value of triflumezopyrim was influenced by physicochemical properties of soils, and the chemical structure and water solubility of the insecticide itself. Most significant correlation was observed between the KF value of triflumezopyrim and the organic matter and clay content of soils; slight correlation between the KF value of triflumezopyrim and the sand content of soils, and very poor correlation between the KF value of triflumezopyrim and pH value and silt content of soils, suggesting that the organic matter and clay content of soils are important factors affecting the adsorption of triflumezopyrim in water-soil environment system. |
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