Enhanced Pb(II) adsorption onto functionalized ordered mesoporous carbon (OMC) from aqueous solutions: the important role of surface property and adsorption mechanism
- 15 April 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Science and Pollution Research
- Vol. 27 (19), 23616-23630
- https://doi.org/10.1007/s11356-020-08487-9
Abstract
Functionalized ordered mesoporous carbon (MOMC-NP) was synthesized by chemical modification using HNO3 and H3PO4 to enhance Pb(II) adsorption. The phosphate functional group represented by P-O-C bonding onto the surface of OMC was verified by FT-IR and XPS. Batch adsorption experiments revealed the improvement of adsorption capacity by 39 times over the virgin OMC. Moreover, the Pb(II) adsorption results provided excellent fits to Langmuir model and pseudo-second-order kinetic model. The adsorption mechanism of Pb(II) onto MOMC-NP revealed the formation of metal complexes with carboxyl, hydroxyl, and phosphate groups through ion exchange reactions and hydrogen bondings. The calculated activation energy was 22.09 kJ/mol, suggesting that Pb(II) adsorption was a chemisorption. At pH>pHpzc, the main Pb(II) existing species of Pb(II) and Pb(OH)+ combine with the carboxyl, hydroxyl, and phosphate functional groups via electrostatic interactions and hydrogen bonding. All these findings demonstrated that MOMC-NP could be a useful and potential adsorbent for adsorptive removal of Pb(II). Graphical abstractFunding Information
- Louisiana Board of Regents (LEQSF (2016-17)-RD-C-15)
- University of Louisiana at Lafayette
This publication has 82 references indexed in Scilit:
- Adsorption of copper (II), chromium (III), nickel (II) and lead (II) ions from aqueous solutions by meranti sawdustJournal of Hazardous Materials, 2009
- Removal of lead(II) from wastewater by activated carbon developed from Tamarind wood by zinc chloride activationChemical Engineering Journal, 2009
- Critical review in adsorption kinetic modelsJournal of Zhejiang University-SCIENCE A, 2009
- Application of chitosan, a natural aminopolysaccharide, for dye removal from aqueous solutions by adsorption processes using batch studies: A review of recent literatureProgress in Polymer Science, 2008
- Preparation of phosphorylated bacterial cellulose as an adsorbent for metal ionsReactive and Functional Polymers, 2008
- Kinetics and thermodynamics of lead ion sorption on palm kernel fibre from aqueous solutionProcess Biochemistry, 2005
- Influence of pH, ionic strength and temperature on lead biosorption by Gelidium and agar extraction algal wasteProcess Biochemistry, 2005
- Adsorption of lead and cadmium ions in aqueous solutions onto modified lignin from alkali glycerol delignicationJournal of Hazardous Materials, 2004
- Kinetic and equilibrium modeling of liquid‐phase adsorption of lead and lead chelates on activated carbonsJournal of Chemical Technology & Biotechnology, 2003
- Selective solid phase extraction of mercury(II) by silica gel-immobilized-dithiocarbamate derivativesAnalytica Chimica Acta, 1999