文献类型：期刊文献

英文题名：Addition of modified bentonites in polymer gel formulation of 2,4-D for its controlled release in water and soil

作者：Li J.[1];Jiang M.[1];Wu H.[1];Li Y.[1]

机构：[1]Department of Chemistry, Shaoxing University, Zhejiang 312000, China

年份：2009

卷号：57

期号：7

起止页码：2868

外文期刊名：Journal of Agricultural and Food Chemistry

收录：MEDLINE(收录号：19253964)、、Scopus(收录号：2-s2.0-64549163709)、PubMed

语种：英文

外文关键词：2,4-D; Carboxymethylcellulose; Clay; Controlled release; Gel

外文摘要：Carboxymethylcellulose (CMC) gel was used for encapsulating anionic herbicide 2,4-D for its controlled release. The slower release rate of 2,4-D in water and soil was obtained by adding in the gel formulation some modified bentonites, which were prepared by intercalating inorganic or organic cations in interlayers of Na+-saturated bentonite. The higher encapsulation efficiencies of 2,4-D were observed on the bentonite/CMC gel formulations due to the sorption of 2,4-D on modified bentonites. The time taken for 50% of 2,4-D to be released in water, t50, showed a variation (8.8-19.8 h) for these gel formulations, the largest value corresponding to the formulation incorporated with hydroxyiron intercalated bentonite that has the highest sorption capacity to 2,4-D. The gel formulations could also control the release of 2,4-D when applied to a thin soil layer and demonstrated potential to reduce leaching of such anionic herbicides in soil. ? 2009 American Chemical Society.