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Architecting neonicotinoid-scavenging nanocomposite hydrogels for environmental remediation
Applied Materials Today ( IF 8.3 ) Pub Date : 2020-11-13 , DOI: 10.1016/j.apmt.2020.100878
Abdulaziz Alammar , Sang-Hee Park , Izwaharyanie Ibrahim , Deepak Arun , Tibor Holtzl , Ludovic F. Dumée , Hong Ngee Lim , Gyorgy Szekely

The ubiquitous presence of neonicotinoid insecticides in the environment poses potential health concerns across all biomes, aquatic systems, and food chains. This global environmental challenge requires robust, advanced materials to efficiently scavenge and remove these harmful neonicotinoids. In this work, we engineered nanocomposite hydrogels based on sustainable cellulose acetate for water treatment. The nanocomposite hydrogels were incorporated with small quantities of polymers of intrinsic microporosity (PIM-1) and graphene oxide (GO). We prepared the hydrogels using green solvents such as Cyrene and MeTHF via simple dropwise phase inversion. High adsorption capacity and fast kinetic behavior toward acetamiprid, clothianidin, dinotefuran, imidacloprid, and thiamethoxam were observed. We also developed a rapid and sustainable ultrasound-assisted regeneration method for the hydrogels. Molecular dynamics of the complex quaternary system revealed the synergistic effects of the components, and the presence of PIM-1 was found to increase the GO surface area available for neonicotinoid scavenging. We demonstrated the robustness and practicality of the nanocomposites in continuous environmental remediation by using the hydrogels to treat contaminated groundwater from the Adyar river in India. The presented methodology is adaptable to other contaminants in both aqueous environments and organic media.



中文翻译:

设计用于清除环境的新烟碱类纳米复合水凝胶

新烟碱类杀虫剂在环境中的普遍存在对所有生物群落,水生系统和食物链造成潜在的健康问题。这项全球环境挑战需要坚固,先进的材料来有效清除和清除这些有害的新烟碱类物质。在这项工作中,我们设计了基于可持续醋酸纤维素的纳米复合水凝胶用于水处理。将纳米复合水凝胶与少量具有固有微孔性(PIM-1)和氧化石墨烯(GO)的聚合物混合。我们使用绿色溶剂(例如,in和MeTHF)通过简单的逐相转化制备了水凝胶。观察到对乙酰胺类,噻虫胺,二甲呋喃,吡虫啉和噻虫嗪具有较高的吸附能力和快速的动力学行为。我们还为水凝胶开发了一种快速且可持续的超声辅助再生方法。复杂的四元体系的分子动力学揭示了各组分的协同作用,并且发现PIM-1的存在增加了可用于清除新烟碱的GO表面积。通过使用水凝胶处理印度阿迪亚尔河受污染的地下水,我们证明了纳米复合材料在持续环境修复中的稳健性和实用性。提出的方法适用于水性环境和有机介质中的其他污染物。并且发现PIM-1的存在会增加可用于清除新烟碱的GO表面积。我们通过使用水凝胶处理印度阿迪亚尔河受污染的地下水,证明了纳米复合材料在持续环境修复中的稳健性和实用性。提出的方法适用于水性环境和有机介质中的其他污染物。并且发现PIM-1的存在增加了可用于清除新烟碱的GO表面积。我们通过使用水凝胶处理印度阿迪亚河受污染的地下水,证明了纳米复合材料在持续环境修复中的稳健性和实用性。提出的方法适用于水性环境和有机介质中的其他污染物。

更新日期:2020-11-13
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