Removal of aromatic amines from water by montmorillonite-(cerium or zirconium) phosphate crosslinked compounds

Journal Article · · Journal of Environmental Quality

DOI:https://doi.org/10.2134/jeq1999.00472425002800010013x· OSTI ID:6482776

Gonzalez-Pradas, E; Villafranca-Sanchez, M; Urena-Amate, M D ^[1]; Del Rey-Bueno, F; Garcia-Rodriguez, A ^[2]

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1. Univ. of Almeria (Spain). Dept. of Inorganic Chemistry
2. Univ. of Granada (Spain). Dept. of Inorganic Chemistry

To evaluate the potential use of two montmorillonite-(Ce or Zr) phosphate crosslinked compounds in removing organic pollutants such as aniline, p-toluidine, and p-acetylaniline from water, adsorption experiments were performed under conditions of varied temperature (288 and 308 K). Adsorption on the montmorillonite-Ce-phosphate compound was best described by a hyperbolic (H-type) isotherm, whereas for the montmorillonite-Zr-phosphate compound, S-type isotherms were obtained for p-toluidine and aniline and L-type for p-acetylaniline. Amines adsorption increases with increasing temperature on the cerium crosslinked material, while for the zirconium-crosslinked compound, adsorption decreases as temperature increases from 288 to 308 K, possibly due to a mainly physical process. Fourier-transform infrared (FTIR) spectroscopy indicated that at the pH generated by the adsorbents, the protonated species of these amines plays an important role in the adsorption process. X-ray diffraction analysis showed that the aromatic amines are intercalated into the adsorbents. For any given amine, the cerium-montmorillonite adsorbent shows a higher capacity of adsorption compared with zirconium-montmorillonite adsorbent, so it might be reasonably used in removing aromatic amines from water.

• OSTI ID: 6482776
• Journal Information: Journal of Environmental Quality, Vol. 28:1; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ADSORPTION
ADSORPTION ISOTHERMS
ANILINE
CERIUM
MONTMORILLONITE
PERFORMANCE
REMEDIAL ACTION
TOLUIDINES
WATER POLLUTION CONTROL
ZIRCONIUM
AMINES
AROMATICS
CLAYS
CONTROL
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTHERMS
MATERIALS
METALS
ORGANIC COMPOUNDS
POLLUTION CONTROL
RARE EARTHS
SORPTION
TRANSITION ELEMENTS
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)