| 陈珊珊1,2，陈淼2,3，武春媛2,3，邓晓2,3，刘景坤2,3，李勤奋2,3.烯啶虫胺在热带土壤中吸附解吸特征研究[J].广东农业科学,2014,41(9):189- |
|
查看全文
HTML
烯啶虫胺在热带土壤中吸附解吸特征研究 |
| Study on adsorption and desorption ofnitenpyram in tropical soil |
| |
| DOI： |
| 中文关键词: 烯啶虫胺 热带土壤 吸附解吸 |
| 英文关键词: Nitenpyram tropical soil adsorption and desorption |
| 基金项目:中央级公益性科研院所基本科研业务费
（2011Hzs1J006）；中国热带农业科学院院本级基本科研业务费-
重大项目培育专项（1630042014003） |
|
| 摘要点击次数: 1417 |
| 全文下载次数: 616 |
| 中文摘要: |
| 为了解烯啶虫胺在热带地区风化程度较高的酸性土壤中的环境行为，根据叶化学农药环境安全评价试
验准则曳中土壤吸附试验规定，采用振荡平衡法，研究了烯啶虫胺在3 种不同热带土壤上的吸附特性。结果表明，烯
啶虫胺在3 种热带土壤上的吸附过程能用Freundlich 方程和Langmuir 方程进行较好的拟合，且吸附行为存在较大
的差异，其Kf值分别为水稻土1.530 L/kg，铁质湿润雏形土3.153 L/kg，暗红湿润铁铝土2.724 L/kg。烯啶虫胺在3 种
热带土壤上的吸附属于难吸附等级，解吸较为容易，易在热带土壤中移动，在施用的过程中容易造成地下水污染。此
外，烯啶虫胺在3 种热带土壤上的吸附主要是分配作用，且吸附自由能驻G 均小于40 kJ/mol，属于物理吸附过程。 |
| 英文摘要: |
| In order to understand the environmental behavior of nitenpyram in acid soil with higher degree of
weathering in tropical areas, according to experimental guideline for environmental safety evaluation of chemical
pesticides, this paper analyzed the adsorption processes of Nitenpyram in three types of tropical soil by batch equilibration
technique. Results showed that the adsorption isotherms of Nitenpyram in three types of tropical soil could be described
well by Freundlich and Langmuir equations. Adsorption behavior of Nitenpyram varied in different types of tropical soil:
adsorption coefficient (Kf) of nitenpyram in paddy soil, ferric-udic cambosols and udic ferralisols was 1.530, 93.153 and
2.724 L/kg, respectively. Nitenpyram was hard to be adsorbed in these soils but was easy to desorb. Adsorption free energy
(G) of nitenpyram in three types of tropical soil was lower than 40 kJ/mol, showing that the partition was predominant and
the adsorption process relied mainly on physical adsorption. |
|
查看/发表评论 下载PDF阅读器 |
|
|
|
