Zeolite-based nanocomposites have become an efficient option for application in herbicide removal and controlled release systems. Our group previously described the degree of swelling in water and salt solutions, spectroscopic and structural properties, and fertilizer desorption from carboxymethylcellulose-poly(methacrylic acid-co-acrylamide)-zeolite nanocomposites. Here, morphological and thermal properties, and swelling degree studies at different pH was investigated in these same nanocomposites. Their water-uptake in these various swelling media was correlated with sorption and desorption profiles of diquat. SEM-EDX technique indicated the presence of zeolite in the nanocomposites, as well as the increase in the quantity of water hydration molecules trapped in the zeolite cavities was confirmed by DSC. Improved diquat sorption from 8.3 to 9.4 mg/g was recorded when 1.5% zeolite was added into nanocomposites, indicating a significant increase in herbicide–matrix interaction. This increase also led to a small decrease in the desorption process, but in a more controlled manner. Variation of pH of the swelling media might have changed the elasticity of nanocomposite chains, which in turn adjusted release rate. A better understanding of nanocomposite–herbicide interaction can help design novel matrices with enhanced pesticide sorption, contributing to reduce contaminations caused by the indiscriminate use of agrochemicals.

基于沸石的纳米复合材料已成为除草剂去除和控释系统应用的有效选择。我们的小组先前描述了水和盐溶液中的溶胀程度、光谱和结构特性，以及从羧甲基纤维素-聚（甲基丙烯酸-共-丙烯酰胺）-沸石纳米复合材料中解吸肥料。在这里，研究了这些相同纳米复合材料在不同 pH 值下的形态和热性能以及溶胀度。它们在这些不同溶胀介质中的吸水率与敌草快的吸附和解吸曲线相关。SEM-EDX 技术表明纳米复合材料中存在沸石，并且通过 DSC 证实了截留在沸石空腔中的水合分子数量增加。敌草快吸附从 8.3 提高到 9。当将 1.5% 沸石添加到纳米复合材料中时，记录到 4 mg/g，表明除草剂-基质相互作用显着增加。这种增加也导致解吸过程的小幅下降，但以更可控的方式。溶胀介质 pH 值的变化可能会改变纳米复合材料链的弹性，从而调节释放速率。更好地了解纳米复合材料与除草剂的相互作用有助于设计具有增强农药吸附的新型基质，有助于减少因滥用农用化学品而造成的污染。溶胀介质 pH 值的变化可能会改变纳米复合材料链的弹性，从而调节释放速率。更好地了解纳米复合材料与除草剂的相互作用有助于设计具有增强农药吸附的新型基质，有助于减少因滥用农用化学品而造成的污染。溶胀介质 pH 值的变化可能会改变纳米复合材料链的弹性，从而调节释放速率。更好地了解纳米复合材料与除草剂的相互作用有助于设计具有增强农药吸附的新型基质，有助于减少因滥用农用化学品而造成的污染。