| 氯胺嘧草醚在土壤中的吸附行为研究 |
| |
| 引用本文： | 戴丹丹,魏优昌,胡冬松,谭成侠.氯胺嘧草醚在土壤中的吸附行为研究[J].农药学学报,2016,18(6):765-771. |
| |
| 作者姓名： | 戴丹丹 魏优昌 胡冬松 谭成侠 |
| |
| 作者单位： | 1.浙江工业大学化学工程学院, 杭州 310014 |
| |
| 摘 要： | 为评价氯胺嘧草醚的环境安全性，采用批量平衡法测定了氯胺嘧草醚在5种土壤中的吸附-解吸行为，并运用数学模型对其吸附-解吸特性及移动性能进行了分析。结果表明:氯胺嘧草醚在5种土壤中的等温吸附-解吸曲线符合Freundlich模型，吸附常数（Kf值）范围在6.991~18.49之间；不同土壤对其的吸附作用强弱依次为:黑土 > 水稻土 > 褐土 > 潮土 > 红土。氯胺嘧草醚在5种土壤中的有机碳吸附常数（KOC）范围在704.4~1 579之间，推测其在土壤中具有低移动性；薄层层析试验也表明，氯胺嘧草醚在土壤中的移动性较弱。氯胺嘧草醚在5种土壤中的吸附自由能绝对值均小于40 kJ/mol，表明其吸附机理主要是物理吸附。其Kf值与土壤有机质含量、黏粒含量呈正相关，而与土壤pH值呈负相关。解吸试验表明，氯胺醚在其中3种土壤中的解吸过程存在滞后现象。研究表明，在正常使用情况下，氯胺嘧草醚不易对地表水或地下水造成污染风险。
|
| 关 键 词： | 氯胺嘧草醚 吸附 解吸附 Freundlich模型 滞后现象 |
| 收稿时间： | 2016/8/20 0:00:00 |
| 修稿时间： | 2016/11/1 0:00:00 |
Adsorption behavior of ZJ1835 in soil |
| |
| DAI Dandan,WEI Youchang,HU Dongsong and TAN Chengxia.Adsorption behavior of ZJ1835 in soil[J].Chinese Journal of Pesticide Science,2016,18(6):765-771. |
| |
| Authors: | DAI Dandan WEI Youchang HU Dongsong and TAN Chengxia |
| |
| Institution: | 1.College of Chemical engineering, Zhejiang University of technology, Hangzhou 310014, China2.Zhejiang Branch of National Pesticide R & DSouth Center, Zhejiang Chemical Industry Research Institute, Hangzhou 310023, China |
| |
| Abstract: | In order to evaluate the environment safety of ZJ1835, the adsorption-desorption experiments of ZJ1835 in five soil samples were conducted by the batch equilibration techniques. Data were analyzed by mathematic models, which described the characteristics and mechanism of adsorptiondesorption and the shift of ZJ1835 in soils. The results showed that the adsorption-desorption isotherms of ZJ1835 was well described by Freundlich model. The adsorption values Kf of ZJ1835 in 5 types of soil samples ranged from 6.991 to 18.49. The adsorption of ZJ1835 in five soil samples showed the following sequence:black soil > paddy soil > cinnamon soil > fluvo-aquic soil > red soil. The organic carbon adsorption coefficients (KOC) of ZJ1835 in five types of soil samples ranged from 704.4 to 1 579, which indicated the low mobility of ZJ1835 in soils. And the TLC experiments showed the mobility of ZJ1835 in soil was low. Moreover, absolute values of the adsorption free energy of ZJ1835 in the tested soils were lower than 40 kJ/mol, which indicated that the adsorption processes were mainly physical adsorption. Kf values increased with the increasing of organic matter (OM) and clay content, while it decreased with the increasing of the soils pH values. The results of desorption indicated that the hystersis phenomena appeared during the desorption process in three kinds of tested soil. In conclusion,no risk to surface water and underground water was expected with normal usage. |
| |
| Keywords: | ZJ1835 adsorption desorption Freundlich model hysteresis phenomena |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《农药学学报》浏览原始摘要信息 |
| 点击此处可从《农药学学报》下载免费的PDF全文 |
|
