Mi Tianwen, Cai Yuxuan, Wang Qing, Habibul Nuzahat, Ma Xiaoli, Su Zhi, Wu Wei
College of Chemistry and Chemical Engineering, Xinjiang Normal University Urumqi 830054 China.
RSC Adv. 2020 Mar 10;10(17):10309-10314. doi: 10.1039/d0ra01044h. eCollection 2020 Mar 6.
Eco-friendliness and low cost are critical when investigating new oil-water separation agents with high separation efficiencies for the treatment of emulsified oily wastewater in industrial applications, including crude oil exploitation. Treatment methods specifically suited to wastewater containing ultra-small oil droplets are lacking and urgently required. This study investigated the one-pot synthesis of humic acid and polydimethyldiallylammonium chloride coated FeO nanoparticles. A low dosage of the nanoparticles (375 μg mL) exhibited excellent separation efficiency (nearly 100%) and reusability when applied to hexadecane-water emulsions containing ultra-small droplets (200-300 nm). Electrostatic interactions and the strong interfacial activity of the nanoparticles played essential roles in achieving oil-water separation. This study provided an efficient extraction material synthesized by a facile and cheap method for separating ultra-small oil droplets from emulsions.
在研究用于工业应用（包括原油开采）中处理乳化含油废水的具有高分离效率的新型油水分离剂时，生态友好性和低成本至关重要。目前缺乏专门适用于含超小油滴废水的处理方法，对此有迫切需求。本研究探讨了腐殖酸和聚二甲基二烯丙基氯化铵包覆的FeO纳米颗粒的一锅法合成。当应用于含有超小液滴（200 - 300纳米）的十六烷 - 水乳液时，低剂量的纳米颗粒（375微克/毫升）表现出优异的分离效率（接近100%）和可重复使用性。纳米颗粒的静电相互作用和强界面活性在实现油水分离中起了关键作用。本研究提供了一种通过简便且廉价的方法合成的高效萃取材料，用于从乳液中分离超小油滴。
