The adsorption behavior of Ni(II) onto graphene oxide (GO) derivatives N-(trimethoxysilylpropyl) ethylenediaminetriacetic acid-modified GO (EDTA-GO) and 3-Tri-methoxysilyl-propyl-diethylenetriamine (amine–silane)-modified GO (amine-GO) were investigated. The EDTA and amine groups significantly enhanced the Ni(II) adsorption capacity of GO. The experimental results illustrated that GO-based sorbents could selectively remove Ni(II) from contaminated water with a maximum adsorption capacity of 103 mg/g within 30–45 min. The influence of pH on the adsorption/desorption properties as well as reusability of the modified GO derivatives was also investigated. These results demonstrate the application of modified GO as an effective adsorbent for water protection.
All Science Journal Classification (ASJC) codes
- Water Science and Technology
- Ocean Engineering
- Graphene oxide