In an attempt to create wastewater treatment “green” techniques that are both economically feasible and sustainable without using any dangerous chemicals, barley grain (Hordeum vulgare L.) water extract was used to phyto-synthesize silver nanoparticles (Ag°). Barley grains served as a natural reductant and stabilizer at the same time. The role of different synthesis conditions and their effect on the efficiency of the green synthesis process were studied and confirmed with characterization using several techniques (UV–vis, SEM, EDX, sizing distribution, and FTIR). The Ag°9 formula catalytic reduction was inspected against p-nitrophenol (PNP) and methylene blue (MB) as a model of nitroaromatic components and dyes, respectively. The removal studies were conducted using the target pollutants in a single or mixed liquid state. Remarkably, the Ag°9 particle size was around 20 nm, and its final concentration in the current formula was 2.2 × 10⁻⁷ mol L⁻¹. The adsorption mechanism of the PNP and MB was pseudo-second order. The good fit with the pseudo-second-order kinetic model suggests that chemisorption occurs in the sorption process. The formula catalytic activity to remove PNP and MB was 99 and 66% at levels 60 and 500 µL from the Ag°9 formula, respectively, within less than 5 min.

为了创建既经济可行又可持续且不使用任何危险化学品的废水处理“绿色”技术，大麦粒 ( Hordeum vulgare L.) 水提取物被用来植物合成银纳米颗粒 (Ag°)。大麦粒同时充当天然还原剂和稳定剂。研究了不同合成条件的作用及其对绿色合成过程效率的影响，并使用多种技术（UV-vis、SEM、EDX、尺寸分布和 FTIR）进行表征并加以证实。分别以对硝基苯酚 (PNP) 和亚甲基蓝 (MB) 作为硝基芳香族组分和染料的模型，检查了 Ag°9 式催化还原反应。使用单一或混合液态的目标污染物进行去除研究。值得注意的是，Ag°9的粒径约为20 nm，其在当前配方中的最终浓度为2.2 × 10 ^-7 mol L ^-1 。 PNP和MB的吸附机理为准二级。与准二级动力学模型的良好拟合表明吸附过程中发生了化学吸附。在 60 µL 和 500 µL 浓度的 Ag°9 配方中，在不到 5 分钟内去除 PNP 和 MB 的配方催化活性分别为 99% 和 66%。