Preparation, characterization and performance of an electrospun carbon nanofiber mat applied in hexavalent chromium removal from aqueous solution
| Autor: | Yu-Ming Zheng, Cheng Xiaoxia, Lu-Bin Zhong, Wu Renxiang, Zhi-Hua Yuan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Chromium
Environmental Engineering Acrylic Resins Nanofibers chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification chemistry.chemical_compound Adsorption Electricity Environmental Chemistry Point of zero charge Hexavalent chromium 0105 earth and related environmental sciences General Environmental Science Aqueous solution Carbonization Carbon nanofiber Temperature Polyacrylonitrile Water General Medicine Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Carbon Solutions Kinetics chemistry 0210 nano-technology Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Journal of Environmental Sciences. 77:75-84 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/j.jes.2018.06.016 |
| Popis: | Hexavalent chromium, Cr(VI), a highly toxic oxyanion known as a carcinogen and mutagen, is an issue of concern due to its adverse impact on human health. Therefore, development of effective technologies and/or materials for Cr(VI) removal from water has been of great interest for researchers. In this study, an electrospun carbon nanofiber (CNF) mat was prepared via electrospinning polyacrylonitrile (PAN), followed by thermal pre-oxidation and carbonization. Scanning electron microscopy (SEM) observation showed that the fiber diameter of the CNF with carbonization temperature of 950°C (CNF950) was about 266 nm. Potentiometric titration analysis demonstrated that the point of zero charge pH (pHpzc) of CNF950 was around 7.93. CNF950 demonstrated high adsorption capacity and fast adsorption kinetics for Cr(VI) at pH |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect