期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 421, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126824
关键词
Natural biomass; Enteromorpha; Surface modification; Durable hydrophobic; Oil-water separation
资金
- scientific research fund project of theNational Natural Science Foundation of China [52070123]
- Natural Science Foundation of Shandong Province [ZR2020ME224]
- Project of Shandong Province Higher Educational Young Innovative Talent Introduction and Cultivation Team [Waste-water treatment and resource innovation team]
The study presents a simple yet effective method to modify the wettability of Enteromorpha from hydrophilic to hydrophobic, achieving efficient oil adsorption and oil-water separation. By grafting n-octyltriethoxysilane on the surface of Enteromorpha, the modified material exhibits excellent adsorption capacities and oil-water separation performance. Under optimized conditions, the maximum adsorption capacity is 11.4 g/g with a contact angle of 137 degrees.
Hydrophobic and oleophilic materials are attractive candidates for efficient oil collection due to their excellent oil-water separation. However, the most of currently reported oil adsorption materials are limited resources or require complicated preparation steps, which causes high energy consumption and not be practical for largescale application. Herein, we report a facile strategy to modify the wettability of Enteromorpha from hydrophilic to hydrophobic, which not only greatly reduces energy consumption but also shows the outstanding capacity for oil-water separation with the maximum adsorption capacities is 11.4 g/g and the contact angle reaches 137 degrees. The successful modification of the Enteromorpha is achieved by grafting n-octyltriethoxysilane on the surface of the pristine Enteromorpha. The hydrophobic and superoleophilic Enteromorpha guarantee adequate voids in the fibrous bundles only for oil adsorption and the oil floating on the seawater is removed by the formation of hydrogen bonding between oil and modified Enteromorpha. By optimizing test, the optimal adsorption conditions are adsorption time of 60 min, oil-water ratio of 1:10 and pH of 7. Our reported hydrophobic organosilane modified Enteromorpha will open a new avenue to control marine oil pollution and suppress the damage of Enteromorpha to the marine ecology system.
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