Atta Ayman M, Mohamed Nermen H, Hegazy Ahmad K, Moustafa Yasser M, Mohamed Rodina R, Safwat Gehan, Diab Ayman A
Chemistry department, college of science, King Saud University, Riyadh 11451, Saudi Arabia.
Egyptian petroleum Research institute, Nasr City, Cairo 11435, Egypt.
Nanomaterials (Basel). 2020 Feb 4;10(2):262. doi: 10.3390/nano10020262.
Crude oil pollution of water bodies is a worldwide problem that affects water ecosystems and is detrimental to human health and the diversity of living organisms. The objective of this study was to assess the ability of water hyacinth (Eichhornia crassipes (Mart.) Solms) combined with the presence of magnetic nanoparticles capped with natural products based on Myrrh to treat fresh water contaminated by crude petroleum oil. Magnetic nanoparticles based on magnetite capped with Myrrh extracts were prepared, characterized, and used to adsorb heavy components of the crude oil. The hydrophobic hexane and ether Myrrh extracts were isolated and used as capping for magnetite nanoparticles. The chemical structures, morphologies, particle sizes, and magnetic characteristics of the magnetic nanoparticles were investigated. The adsorption efficiencies of the magnetic nanoparticles show a greater efficiency to adsorb more than 95% of the heavy crude oil components. Offsets of Water hyacinth were raised in bowls containing Nile River fresh water under open greenhouse conditions, and subjected to varying crude oil contamination treatments of 0.5, 1, 2, 3, and 5 mL/L for one month. Plants were harvested and separated into shoots and roots, oven dried at 65 °C, and grounded into powder for further analysis of sulphur and total aromatic and saturated hydrocarbons, as well as individual aromatic constituents. The pigments of chlorophylls and carotenoids were measured spectrophotometrically in fresh plant leaves. The results indicated that the bioaccumulation of sulphur in plant tissues increased with the increased level of oil contamination. Water analysis showed significant reduction in polyaromatic hydrocarbons. The increase of crude oil contamination resulted in a decrease of chlorophylls and carotenoid content of the plant tissues. The results indicate that the water hyacinth can be used for remediation of water slightly polluted by crude petroleum oil. The presence of magnetite nanoparticles capped with Myrrh resources improved the remediation of water highly polluted by petroleum crude oil.
水体的原油污染是一个全球性问题，它影响水生态系统，对人类健康和生物多样性有害。本研究的目的是评估凤眼莲（Eichhornia crassipes (Mart.) Solms）结合基于没药的天然产物包覆的磁性纳米颗粒处理受原油污染的淡水的能力。制备了用没药提取物包覆的基于磁铁矿的磁性纳米颗粒，对其进行了表征，并用于吸附原油的重质成分。分离出疏水性的己烷和乙醚没药提取物，并用作磁铁矿纳米颗粒的包覆材料。研究了磁性纳米颗粒的化学结构、形态、粒径和磁性特征。磁性纳米颗粒的吸附效率显示出对吸附超过95%的重质原油成分具有更高的效率。在开放式温室条件下，将凤眼莲的分株种植在装有尼罗河淡水的碗中，并分别用0.5、1、2、3和5 mL/L的不同原油污染处理一个月。收获植物并将其分为地上部分和根部，在65°C下烘干，磨成粉末以进一步分析硫、总芳烃和饱和烃以及单个芳烃成分。用分光光度法测量新鲜植物叶片中的叶绿素和类胡萝卜素色素。结果表明，植物组织中硫的生物积累随着油污水平的增加而增加。水分析显示多环芳烃显著减少。原油污染的增加导致植物组织中叶绿素和类胡萝卜素含量降低。结果表明，凤眼莲可用于修复轻度受原油污染的水。用没药资源包覆的磁铁矿纳米颗粒的存在提高了对高度受石油原油污染的水的修复效果。
