具有智能润湿表面的凹凸棒土基除草剂颗粒,可在连续的碱酸刺激下对环境安全的草甘膦进行递送

IF 10 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Nana Jing , Chaowen Chen , Chuang Chen , Xue Yuan , Xueqi Ma , Guopeng Teng , Jia Zhang , Xingjiang Li , Zhengyan Wu
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引用次数: 0

摘要

为了减少农药的损失,提高有效成分的利用效率,操作简便的ph响应型控释农药在单独使用酸或碱时可能干扰非目标生物,因此得到了广泛的应用。为了克服这一障碍,我们开发了一种具有智能润湿表面的环保除草剂颗粒,可以通过连续的酸碱刺激来调节,以保持稳定的pH值水平。首先将凹凸棒土(ATP)与草甘膦(Gly)混合,并用苯胺修饰的ATP (ph-ATP)和氨基硅油(ASO)混悬液包被,最终构建出最外层的聚乙烯吡咯烷酮(PVP),得到智能除草剂(AG@ph-AA@PVP)。碱会破坏最外层的PVP膜,后期的酸处理使ph-AA层由于苯胺基的质子化而逐渐由疏水性变为亲水性,这两种作用都允许水进一步侵入,促进Gly的释放。因此,AG@ph-AA@PVP具有优异的碱-酸敏感性和控释性能,在盆栽试验中表现为在水中的突发性Gly释放和显著的防杂草效果。分析了材料与表面润湿性的相互作用,以解释控释机理。此外,AG@ph-AA@PVP具有较高的环境稳定性和良好的生物安全性。这项工作开发了一种简单可行的技术,用于环境安全的按需配送,有助于促进可持续和绿色农业的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Attapulgite-based herbicide particles with smart wetting surface for environmental-safe glyphosate delivery induced by consecutive base-acid stimuli
To minimize the pesticide loss and enhance the efficiency of active ingredient utilization, the pH-responsive controlled-release pesticide with easy operation has been widely applied despite for its potential on bothering the non-target organisms while using acid or alkaline alone. To overcome that obstacle, we developed an environmentally safe herbicide particle with a smart wetting surface that can be regulated through consecutive base-acid stimuli to maintain stable pH levels. Herein, attapulgite (ATP) is mixed with glyphosate (Gly) initially and the resultants are coated by suspensions of phenylamine-modified ATP (ph-ATP) and amino silicon oil (ASO), ultimately the outmost polyvinyl pyrrolidone (PVP) are constructed to acquire the smart herbicide (AG@ph-AA@PVP). The base may destroy the outmost PVP membrane, and the later acid treatment turns ph-AA layer gradually from hydrophobic to hydrophilic due to protonation of aniline groups, both of which allow water to invade further and promote Gly release. Therefore, the AG@ph-AA@PVP appears with excellent base-acid sensitivity and controlled-release performance, being demonstrating by the burst Gly release in water and significant weeds control efficiency in pot experiments. The interaction of the materials and the surface wettability were analyzed for explaining the controlled-release mechanism. Besides, AG@ph-AA@PVP possesses high environmental stability and good biosafety. This work develops a simple and feasible technology for environmental-safe and on-demand Gly delivery, assisting for advancement of sustainable and green agriculture.
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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