Water contamination issues caused by spilled oil or other organic pollutants are urgently requiring the development of new oil sorbent materials that may desirably have the functionalities of reusability and efficiency. To further improve hydrophobicity , sorption capacity and oil retention rate, in this study, cotton modified with vinyl triethoxysilane (VTES, KH-151) to improve them. The introduction of KH-151 onto the surface of cotton was verified by SEM, FT-IR, XPS and EDS. The oil-water selectivity , sorption and retention capacities and cycling performance were tested. Compared with the raw cotton, modified cottons surface enhanced the rate and capacity of oil separation from oily water, the sorption capacity for soybean oil was increased from 9.83 g g –1 to 27.26 g g –1 and for dimethylsilicone oil from 7.92 g g –1 to 25.09 g g –1 after 10 cycles. The oil retention rates of modified cottons exceed 95 % for soybean oil within 10 min at low specific volumes. It gradually decreased by specific volume increasing but still maintained over 75 % at the 14 cm 3 g –1 . These indicated the hydrophobic and superoleophilic properties, and good recyclability . The developed method and sorbent hold promise for easy storage, environmentally friendly, reusable and relatively cost-effective oil cleanup in emergency treatment of spilled oil or other organic pollutants.
Developing convenient and rapid method for eliminating uranium from massive contaminated water under emergency conditions is highly needed. Herein we developed a novel chemical precipitation strategy based on graphene aerogel capsulated with the degradation products of phytic acid (PAGA). With hydrothermal treatment, graphene oxide was twisted and reduced to generate aerogel, acting as an encapsulator. At the same time, phytic acid (PA) was degraded into various compounds and capsulated into graphene aerogel with a high loading capacity of 85 g/g. After adding PAGA into uranium contaminated water, the degradation products were released out of GA skeleton to combined with uranium and form sediments. The elimination capacity reached up to 3550 mg/g within 40 min and the obtained sediments possessed good stability in the following 72 h. PAGA capsule also presented high removal rate in various water systems, making it a kind of versatile material in the elimination of uranium under emergency conditions.
危险品化学品经营许可证（带存储）