Comparative study of CTAB adsorption on bituminous coal and clay mineral
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Roman Maršálek
and
Zuzana Navrátilová
Abstract
Adsorption of cetyltrimethylammonium bromide (CTAB) onto bituminous coal (BC) and a clay mineral, montmorillonite (MMT), was studied. Simultaneous measurements of the CTAB adsorption and zeta potential determination of the adsorption suspensions were carried out. The adsorption isotherms were found to be of the typical Langmuir type; values of the CTAB adsorption capacities were calculated (a m = 0.65 mmol g−1 for coal and a m = 3.24 mmol g−1 for MMT). The shape of the adsorption isotherms was correlated with zeta potential values at the adsorption equilibrium. The adsorption properties of both sorbents were studied by voltammetry on carbon paste electrodes (CPE) modified with coal-CTAB and MMT-CTAB system, respectively. Open circuit sorption with differential pulse voltammetry was performed in order to compare the sorption properties of the systems with the unmodified sorbents. The Cu2+ adsorption on BC and MMT decreased to approximately 50 % and 40 %, respectively. The surface adsorption mechanism of CTAB on coal based on hydrophilic interactions was proposed. In the case of montmorillonite, the CTAB intercalation is expected via ion exchange into the inter-layer space forming a double- or triple-layer arrangement.
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© 2010 Institute of Chemistry, Slovak Academy of Sciences
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Articles in the same Issue
- Application of polyaniline as an efficient and novel adsorbent for azo dyes removal from textile wastewaters
- Enzymatic synthesis and analytical monitoring of terpene ester by 1H NMR spectroscopy
- Effect of fiber modification with carboxymethyl cellulose on the efficiency of a microparticle flocculation system
- Synthesis, crystal structure, and thermal analysis of a copper(II) complex with imidazo[4,5-f]1,10-phenantroline
- Hydrothermal synthesis of core-shell structured PS@GdPO4:Tb3+/Ce3+ spherical particles and their luminescence properties
- Optical characterisation of organosilane-modified nanocrystalline diamond films
- Synthesis, optical, and spectroscopic characterisation of substituted 3-phenyl-2-arylacrylonitriles
- A new group of potential antituberculotics: N-(2-pyridylmethyl)salicylamides and N-(3-pyridylmethyl)salicylamides
- Synthesis and antimicrobial properties of new 2-((4-ethylphenoxy)methyl)benzoylthioureas
- Synthesis, characterisation, and biological activity of three new amide prodrugs of lamotrigine with reduced hepatotoxicity
- Comparative study of CTAB adsorption on bituminous coal and clay mineral
- Density of the systems (NaF/AlF3)—AlPO4 and (NaF/AlF3)—NaVO3
- Semiquinol and phenol compounds from seven Senecio species
- Determination of the enthalpy of fusion of K3NbO2F4
