Department of Biology, College of Science, King Khalid University, 9004 Abha, Saudi Arabia; Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena, Egypt.
Polymer Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City 21934, Alexandria, Egypt.
Int J Biol Macromol. 2021 Jan 31;168:116-123. doi: 10.1016/j.ijbiomac.2020.12.055. Epub 2020 Dec 9.
Wide dissemination of pesticides for protecting plants against pests has resulted in high production of un-infected crops but higher environmental pollution. High percentages of pesticides are released to the environment and finally use water as the final destination. The current study is concerning by removal of Imidacloprid pesticide from water using pressure-free passage through polymeric membrane integrated design. Both of chitosan and chitosan functionalized silver nanoparticles (AgNPs @chitosan) membranes were prepared, characterized and applied as adsorbent matrix for Imidacloprid. SEM, TEM and PSA analysis revealed the biosynthesis of AgNPs in the range of 25-50 nm. However, SEM and FTIR analysis revealed the proper formation of chitosan membrane and its proper functionalization with silver nanoparticles. Both of chitosan and AgNPs @chitosan membranes succeeded to remove 40 and 85% of Imidacloprid at slightly acidic pH, respectively. Moreover, the amount of removed Imidacloprid was proportional with the amount of its initial concentration indicating the successful removal of Imidacloprid by AgNPs @chitosan membrane even at higher pesticide concentrations. The obtained results indicate the promising use of AgNPs @chitosan membranes for removal of Imidacloprid pesticide from contaminated water depending on the pressure-free design that lacks external energy support.
为了保护植物免受虫害，广泛使用农药来进行喷洒，这虽然带来了未受感染作物的高产量，但也导致了更高的环境污染。大量的农药被释放到环境中，最终以水为最终归宿。本研究关注的是使用无压力通过聚合物膜集成设计从水中去除吡虫啉农药。壳聚糖和壳聚糖功能化银纳米粒子（AgNPs@壳聚糖）膜均被制备、表征并用作吡虫啉的吸附基质。SEM、TEM 和 PSA 分析表明，AgNPs 的生物合成范围在 25-50nm 之间。然而，SEM 和 FTIR 分析表明壳聚糖膜的适当形成及其与银纳米粒子的适当功能化。壳聚糖和 AgNPs@壳聚糖膜在略酸性 pH 下分别成功去除了 40%和 85%的吡虫啉。此外，去除的吡虫啉的量与初始浓度的量成正比，这表明即使在较高的农药浓度下，AgNPs@壳聚糖膜也能成功去除吡虫啉。研究结果表明，AgNPs@壳聚糖膜有望用于去除受污染水中的吡虫啉农药，这取决于无压力设计，该设计缺乏外部能量支持。
