The potential removal of imidacloprid from water by heat‐treated kerolites

Pest Management Science - Tập 59 Số 10 - Trang 1162-1168 - 2003
M. Socías‐Viciana1, E. González‐Pradas1, M. A. Saifi1, M.D. Ureña‐Amate1, F. Flores‐Céspedes1, Manuel Fernández‐Pérez1
1Department of Inorganic Chemistry, University of Almería, La Cañada San Urbano s/n, 04120 Almería, Spain

Tóm tắt

AbstractThe 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. Copyright © 2003 Society of Chemical Industry

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Pest Management Science

Tập 59 Số 10

1162-1168

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