| Literature DB >> 28024204 |
Xingguo Cai1, Junyong He1, Liang Chen1, Kai Chen1, Yulian Li1, Kaisheng Zhang1, Zhen Jin2, Jinyun Liu2, Chengming Wang3, Xuguang Wang4, Lingtao Kong5, Jinhuai Liu2.
Abstract
A novel graphitic carbon nitride (g-C3N4) nanosheet adsorbent with a large surface area, remarkable hydrophilicity and high adsorption capacity, was presented for the removal of cadmium ions (Cd2+) and methylene blue (MB) from aqueous solution. Adsorption measurements were conducted systematically to study the influences of the contact time, initial concentrations of Cd2+ and MB, temperature, and pH value. The maximum adsorption capacities of g-C3N4 towards Cd2+ and MB were 94.4 and 42.1 mg g-1, respectively, at 318.5 K when the initial concentrations of Cd2+ and MB were 200 and 20 mg L-1, respectively. The adsorption kinetics fit a pseudo-second-order model. The high adsorption performance of the g-C3N4 adsorbent can be attributed to the multiple adsorption sites on g-C3N4, including the π-π conjugate interactions and electrostatic attractions with pollutants in water. In addition, it is significant to achieve high adsorption performance of g-C3N4 nanosheets by efficiently exposing the adsorption sites by adjusting the microstructure surface properties and dispersity in solution.Entities:
Keywords: Adsorption; Cadmium ion; Methylene blue; g-C(3)N(4) nanosheet
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Year: 2016 PMID： 28024204 DOI： 10.1016/j.chemosphere.2016.12.073
Source DB: PubMed Journal: Chemosphere ISSN： 0045-6535 Impact factor: 7.086