Composite materials consisting of the silver salt of dodecatungstophosphoric acid and HBEA zeolite are developed in order to give materials of superior adsorption properties for aqueous pesticide removal. Two-step impregnation and an ion-exchange method with variable constituent mass ratios were employed as synthesis procedures. One of the study goals was to optimize the composite preparation for efficient elimination of glyphosate pesticide and to investigate the modulation of antioxidant activity in the presence of pesticide. Based on comprehensive results, we propose mechanisms for simultaneous glyphosate removal and antioxidant activity. Spectroscopic analysis shows that the applied two-step impregnation method results in advanced composite materials with evenly distributed active sites for glyphosate adsorption and radical-scavenging activity. The original Krishnamurti isotherm is successfully used to fit pesticide adsorption data, pointing to co-operative adsorption of glyphosate on partly saturated adsorbents sites. The amount of glyphosate adsorbed from water suspension was 378 mg per gram of composite material, the highest value reported for glyphosate removal to date.

开发了由十二钨磷酸银盐和 HBEA 沸石组成的复合材料，以便为去除水性农药提供具有优异吸附性能的材料。采用两步浸渍和具有可变成分质量比的离子交换方法作为合成程序。研究目标之一是优化复合制剂以有效消除草甘膦农药，并研究在农药存在下抗氧化活性的调节。基于综合结果，我们提出了同时去除草甘膦和抗氧化活性的机制。光谱分析表明，应用的两步浸渍方法产生了具有均匀分布的草甘膦吸附活性位点和自由基清除活性的高级复合材料。原始的 Krishnamurti 等温线成功地用于拟合农药吸附数据，表明草甘膦在部分饱和吸附剂位点上的协同吸附。从水悬浮液中吸附的草甘膦量为每克复合材料 378 毫克，这是迄今为止报告的草甘膦去除率的最高值。