Polymer Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P. O. Box: 21934, Alexandria, Egypt.
Modeling and Simulation Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria, 21934, Egypt.
Sci Rep. 2021 Oct 6;11(1):19879. doi: 10.1038/s41598-021-99241-9.
A novel chitosan grafted citronellal (Ch-Cit) schiff base amphiphilic polymer was developed for the adsorptive removal of oil spills. The chemical structure was verified by FT-IR spectroscopy and H NMR spectrometer, while the morphological changes and surface area were investigated by SEM and BET analysis tools. The amphiphilic character of Ch-Cit schiff base was controlled through variation of the grafting percentage (G%) of citronellal from 11 to 61%. Dramatic changes in the ion exchange capacity (IEC), solubility and water uptake profiles were established, while the oil adsorption capacity was founded in direct relation with the G (%) of citronellal. Operational conditions such as oil amount, adsorption time, adsorbent dose and agitation speed were investigated. The developed Ch-Cit schiff base exhibited a higher surface area (115.94 m/g) compared to neat chitosan (57.78 m/g). The oil adsorption capacity of the Ch-Cit schiff base was greatly improved by 166% and 120% for light crude and heavy crude oil, respectively. Finally, the adsorption process was optimized using response surface methodology (RSM).The results substantiate that the amphiphilic Ch-Cit schiff base could be efficiently applied as a low-cost oil-adsorbent for the removal of crude oil spills from sea-water surfaces.
一种新型壳聚糖接枝香茅醛（Ch-Cit）席夫碱两亲聚合物被开发用于吸附去除溢油。通过傅里叶变换红外光谱（FT-IR）和核磁共振波谱仪（H NMR spectrometer）验证了其化学结构，而通过扫描电子显微镜（SEM）和 BET 分析工具研究了形态变化和表面积。通过改变香茅醛的接枝率（G%）从 11%到 61%，控制了 Ch-Cit 席夫碱的两亲特性。建立了离子交换容量（IEC）、溶解度和吸水率的显著变化，而吸油能力与香茅醛的 G%呈直接关系。考察了油的用量、吸附时间、吸附剂用量和搅拌速度等操作条件。与壳聚糖（57.78 m/g）相比，开发的 Ch-Cit 席夫碱具有更高的表面积（115.94 m/g）。Ch-Cit 席夫碱对轻质原油和重质原油的吸油能力分别提高了 166%和 120%。最后，使用响应面法（RSM）对吸附过程进行了优化。结果表明，两亲性 Ch-Cit 席夫碱可有效地用作从海水中去除原油溢油的低成本吸油剂。
