Removal of Hexavalent Chromium by Electrospun Silicon Dioxide Nanofibers Embedded with Copper-Based Organic Frameworks

A novel adsorbent copper-based organic skeleton/silicon dioxide (HKUST-1/SiO2) composite nanofiber, which can effectively remove Cr (VI) under synergistic action, has been prepared by embedding growth technique. This was characterized embedded of HKUST-1 on inorganic SiO2 electrospun nanofibers, in water with the help adsorption and membrane separation action. The results revealed that successfully between pores nanofibers. factors affecting performance nanofibers were studied, result displayed concentration solution 120 mg/L, best range for pH 3~7, equilibrium about 45 min, maximum amount 62.38 mg/g. Compared fiber without growth, adsorptive property significantly increased 15 process spontaneous belonged to heat absorption reaction, consistent Langmuir pseudo-second-order kinetic model. In addition, HKUST-1/SiO2 NFs be used recovery chromium resources because captured calcined recovered later stage, reduces consumption desorption liquid, simplifies steps, is conducive energy saving emission reduction. Therefore, are expected applied field hexavalent wastewater purification resource recovery.