The onion-like carbon (OLC) was prepared as adsorbent and tested for the removal of chromate ions from aqueous solutions. The OLC was thermally derived from nanodiamond by vacuum annealing at 1000–2000 °C. An investigation was conducted the chromate adsorption mechanism of OLC, by analysing the temperature-dependent evolution of the various oxygen-carbon bonds and the chemisorbed water by X-ray photo electron spectroscopy, as well as by the first principle calculation of the bond energies for relevant bond configurations. The present work demonstrated the importance of the carbon-oxygen bond type and carbon dangling bonds for chromate adsorption, as well as for other anionic heavy metals adsorbed from wastewater and sewage.
Bibliographical noteFunding Information:
This study was supported by the Korea Ministry of Environment as Global Top Project (Project No. RE201606110) and the Korea Institute of Science and Technology (KIST) institutional program (Grant No. 2E26251 ). This study was also partly supported by another KIST institutional program (Grant No. 2E26370 and 2E26130 ). This study was also partly supported by the computational resources of the HPCI system provided by the HPCI System Research Project (Project ID: hp140014, hp140063, hp150018, hp150032). Appendix A
© 2016 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Health, Toxicology and Mutagenesis