State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
Langmuir. 2021 Dec 14;37(49):14380-14389. doi: 10.1021/acs.langmuir.1c02299. Epub 2021 Dec 6.
A relatively straightforward green method to fabricate robust hydrophobic sponges for effective removal of oil pollutants and other organic contaminants was developed. These sponges were constructed from bio-sources: citronellal and palmitic acid-modified aminoethyl cyclodextrin-sodium phytate-chitosan (ACCTCS). The modified sponge exhibited desirable mechanical properties and strong hydrophobicity with a water contact angle (WCA) of 147.8°. Scanning electron microscopy showed that the ACCTCS sponge had a highly porous structure that was particularly suitable for organic component absorption. The sponge exhibited excellent absorption capacities for -hexane, trichloromethane, vacuum pump oil, and peanut oil (47.9, 32.3, 32.6, and 32.2 g/g, respectively). The removal rate of oil was more than 80% (>26.2 g/g) after 10 absorption-desorption cycles. The ACCTCS sponge also showed good oil/water and organic components/water separation performance. The bio-source materials, green preparation method, and new absorbed-oil recovery strategy provided a novel pathway to construct multifunctional absorbents for oil/water separation in industrial wastewater.
开发了一种相对简单的绿色方法来制备坚固的疏油海绵，以有效去除油污染物和其他有机污染物。这些海绵由生物源材料：香芹酮和棕榈酸改性的氨基乙基环糊精-植酸钠-壳聚糖（ACCTCS）构建而成。改性后的海绵具有理想的机械性能和强疏水性，水接触角（WCA）为 147.8°。扫描电子显微镜显示，ACCTCS 海绵具有高度多孔的结构，特别适合有机成分的吸收。该海绵对正己烷、三氯甲烷、真空泵油和花生油的吸收能力分别为 47.9、32.3、32.6 和 32.2 g/g。经过 10 次吸收-解吸循环后，油的去除率超过 80%（>26.2 g/g）。ACCTCS 海绵还表现出良好的油水和有机成分/水分离性能。生物源材料、绿色制备方法和新的吸油回收策略为构建用于工业废水中油水分离的多功能吸收剂提供了新途径。
