potential removal of imidacloprid from water by heat-treated kerolites

The adsorption of imidacloprid [1-(6-chloro-3-pyridinylmethyl)-N-nitroimidazolidin-2-ylideneamine] on heat-treated kerolite samples at 110 °C (K-110), 200 °C (K-200), 400 °C (K-400) and 600 °C (K-600) from pure water solution at 25 °C has been studied. The evolution of the surface properties of the...

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Bibliographic Details
Published in:Pest management science 2003-10, Vol.59 (10), p.1162-1168
Main Authors: Socías-Viciana, M, González-Pradas, E, Saifi, M, Ureña-Amate, M.D, Flores-Céspedes, F, Fernández-Pérez, M
Format: Article
Language:English
Subjects:
Adsorption
Aluminum Silicates - analysis
Aluminum Silicates - metabolism
Biological and medical sciences
clay
Control
drinking water
evolution
Fourier transform infrared spectroscopy
Fundamental and applied biological sciences. Psychology
heat treatment
Hot Temperature
imidacloprid
Imidazoles - isolation & purification
Imidazoles - metabolism
insecticide
Neonicotinoids
Nitro Compounds
Phytopathology. Animal pests. Plant and forest protection
pollution
Porosity
Protozoa. Invertebrates
removal
sampling
sorption isotherms
Spectroscopy, Fourier Transform Infrared - methods
surface area
Surface Properties
thermogravimetry
Thermogravimetry - methods
Water - metabolism
Water Pollutants, Chemical - isolation & purification
Water Pollutants, Chemical - metabolism
Water Pollution, Chemical - prevention & control
X-ray diffraction
X-Ray Diffraction - methods
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Summary:The adsorption of imidacloprid [1-(6-chloro-3-pyridinylmethyl)-N-nitroimidazolidin-2-ylideneamine] on heat-treated kerolite samples at 110 °C (K-110), 200 °C (K-200), 400 °C (K-400) and 600 °C (K-600) from pure water solution at 25 °C has been studied. The evolution of the surface properties of the kerolite samples, such as specific surface area and porosity, after heat treatment were analysed. The clays were characterised by using FTIR spectroscopy, X-ray diffraction, thermogravimetric and differential thermogravimetric analysis, surface analysis and Hg porosimetry. The experimental adsorption data points were fitted to the Freundlich equation in order to calculate the adsorption capacities (Kf) of the samples; Kf values ranged from 242 mg kg−1 for the K-110 sample to 1005 mg kg−1 for the K-600 sample. The values obtained for the removal efficiency (R) ranged from 62.8% for K-110 to 87.2% for K-600. The adsorption experiments showed that the stronger the heat treatment, the more effective was the adsorption of imidacloprid from pure water. This work shows the potential use of heat-activated kerolite for the removal of imidacloprid from environmental waters and drinking water resources.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.745