Water Resources and Desert Soils Division, Soil Physics and Chemistry Department, Desert Research Center, El-Matariya, Cairo, 4540031, Egypt.
Laboratory of Water & Soil Chemistry, Water Resources and Desert Soils Division, Desert Research Center, El-Matariya, Cairo, 4540031, Egypt.
Sci Rep. 2022 Apr 6;12(1):5780. doi: 10.1038/s41598-022-09423-2.
The synthesis of different metal oxide nanoparticles (NPs) (e.g., ZnO, MgO and SiO) using green methods is a promising alternative to traditional chemical methods. In this work, ZnO, MgO, and SiO NPs were prepared using lemon peel extract. The synthesized NPs were characterized using Fourier transform infrared spectroscopy, UV-Visible spectroscopy, X-ray diffraction, and transmission electron microscopy. Also, the effects of the green synthesis of different NPs on the irrigation water quality, the availability of some heavy metals in soil and plants, and the productivity of Origanum majorana (marjoram) were studied in detail. The obtained results showed that the addition of the NPs resulted in noticeable variations in the removal percentages of Cu and Fe from aqueous solutions. The maximum values obtained for the adsorption of Cu(II) on ZnO, MgO, and SiO NPs within the pH values of 3-5 were 89.9%, 83.3%, and 68.36%, respectively. Meanwhile, the maximum adsorption values of Fe(III) at pH 3.3 were 82%, 80%, and 65% for ZnO, MgO, and SiO NPs, respectively. Clearly, the application of the NPs effectively reduced the available Cu in the studied soil samples in the following order: Zn2 > Zn1 > Mg2 > Si2 > Mg1 > Si1 > C (control). The highest values of available Cu were observed in the control treatment, whereas the lowest values were obtained when Zn2 was added. The same tendencies were observed with substantial concentrations of Fe. The addition of NPs to the soil samples positively affected the plants' Cu uptake. The effects of NPs and the additions of Cu and Fe on the availability of nitrogen, phosphorus, and potassium (NPK) in the soil system were very completed and osculated from one treatment to another. The same tendencies were observed with the total concentration of NPK in plants.
使用绿色方法合成不同的金属氧化物纳米粒子（如 ZnO、MgO 和 SiO）是替代传统化学方法的一种有前途的方法。在这项工作中，使用柠檬皮提取物制备了 ZnO、MgO 和 SiO 纳米粒子。使用傅里叶变换红外光谱、紫外-可见光谱、X 射线衍射和透射电子显微镜对合成的纳米粒子进行了表征。此外，详细研究了不同 NPs 的绿色合成对灌溉水质量、土壤和植物中一些重金属的有效性以及奥勒冈（马郁兰）的生产力的影响。结果表明，添加纳米粒子会导致从水溶液中去除 Cu 和 Fe 的百分比发生明显变化。在 pH 值为 3-5 范围内，ZnO、MgO 和 SiO 纳米粒子对 Cu(II)的吸附最大值分别为 89.9%、83.3%和 68.36%。同时，在 pH 3.3 时，ZnO、MgO 和 SiO 纳米粒子对 Fe(III)的最大吸附值分别为 82%、80%和 65%。显然，纳米粒子的应用有效地降低了研究土壤样品中有效 Cu 的含量，其顺序为：Zn2>Zn1>Mg2>Si2>Mg1>Si1>C（对照）。对照处理中观察到最大的有效 Cu 值，而添加 Zn2 时则获得最低的有效 Cu 值。Fe 也呈现出相同的趋势。将纳米粒子添加到土壤样品中会对植物的 Cu 吸收产生积极影响。纳米粒子以及 Cu 和 Fe 的添加对土壤系统中氮、磷、钾（NPK）的有效性的影响非常完整，从一种处理到另一种处理都非常相似。植物中 NPK 的总浓度也呈现出相同的趋势。
