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DOI: https://doi.org/10.4491/eer.2019.004
Sorption of chlorophenols on geotextile of the geosynthetic clay liners
M'hamed Ahari1, Nathalie Touze-Foltz2, and Laurent Mazéas2
1Laboratory of Research and Development in Engineering Sciences, Faculty of Sciences and techniques, Abdelmalek Essaâdi University, 32000 Al Hoceima, Morocco
2National Research Institute of Science and Technology for Environment and Agriculture (IRSTEA), HBAN research unit, 1, rue Pierre-Gilles de Gennes, CS 10030, 92761 Antony Cedex, France
Corresponding Author: M'hamed Ahari ,Tel: +212-539807172, Fax: +212-539807173, Email: ahari.mhamed@gmail.com
Received: January 2, 2019;  Accepted: February 25, 2019.
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ABSTRACT
Knowledge of organic micropollutant transfers in barrier seal materials from waste storage facilities is limited to volatile organic compounds and phenolic compounds at ambient temperature. This study focused on the sorption of chlorophenols (CPs) from various geotextiles from clay geosynthetics under the influence of temperature. Also to study the impact of the polarity or the amount of CPs adsorbed on geotextiles with the partition coefficient. The effect of various parameters such as contact time, effect of temperature, initial CPs concentration and adsorbent dosage has been carried out in this study. The result obtained is non-linear and the data was calculated for affinity with Freundlich isotherm model. An important observation is that the amount of CPs sorbed on geotextiles increases with a growing number of chlorine atoms, ie increases with the partition coefficient (log Kow). During this study, a decrease in adsorbent properties was observed with the rise in temperature from 23°C to 55°C. The partitioning coefficients for CPs examined range are from 2.4 (R2 = 0.86) to 8.4 mL/g (R2 = 0.90). Among the CPs studied, the highest adsorbed quantity was observed for pentachlorophenol with 0.052 g/g at 23°C, this quantity will decrease with the increase in temperature.
Keywords: Adsorption | Chlorophenols | Geotextile | Hydrophobicity | Temperature effect
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