| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 588063 | Process Safety and Environmental Protection | 2016 | 13 Pages |
•Ni(OH)2-NP-AC was used as efficient adsorbent for removal of Malachite green.•The optimized contact time and pH was found to be 15 min and 6.5, respectively.•MG adsorption increases as the Ni(OH)2-NP-AC dose increased.•0.7 g L−1 was chosen as the optimum adsorbent dose.•Adsorption of MG dye onto Ni(OH)2-NP-AC was spontaneous and endothermic.
An extremely small size novel adsorbent, nickel hydroxide nanoplate loaded on activated carbon (Ni(OH)2-NP-AC) was synthesized using a simple, low cost and highly efficient method. The developed adsorbent was used for the removal of hazardous MG dye from the aqueous solution. To evaluate the importance of Ni(OH)2 nanoplates on the adsorption and removal process, the contact time of virgin AC and Ni(OH)2-NP-AC were compared (under the same conditions) that the results showed Ni(OH)2 nanoplate had a crucial role in the removal or adsorption process. The surface unique textural and morphological properties such as high surface area (>960 m2 g−1) and low pore size (<3.5 nm) made it possible for efficient and rapid removal of MG. Subsequently, the impact of various influential variables such as pH, adsorbent dosage, initial dye concentration, contact time and temperature were examined and optimized. The adsorption kinetic and equilibrium data of MG were found well fitted and found to be in good agreement with pseudo-second-order and Langmuir models, respectively. Finally, antibacterial activity of the synthesized nanoplates was evaluated by testing against some Gram-negative and Gram-positive bacteria. The results of this antibacterial testing indicated that the synthesized nanoplates showed effective bactericidal activity.
Graphical abstractTextural and morphological surface presentation of developed adsorbent.Figure optionsDownload full-size imageDownload high-quality image (306 K)Download as PowerPoint slide
