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- Volume 86 - Année 2017
- Special issue
- Preparation of a new modified clay with amino acid for anionic pollutant removal from water
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Preparation of a new modified clay with amino acid for anionic pollutant removal from water
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Version PDF originaleAbstract
Modified montmorilonite (Mt) as clay mineral with amino acid (M-AA) was synthesized by cation exchange method and used to remove anionic pollutants from water. The modified clay was characterized by X-ray diffraction (XRD) and zeta potential. XRD results showed that aminoacid can be intercalated into the Mt and increase the interlayer space of Mt. Positive zeta potential of modified Mt confirmed the modification of Mt with amino acid. The adsorption of pollutants onto modified Mt as a function of their initial concentration and solution pH was investigated. The removal efficiency was increased with increasing the pollutant initial concentration, however it decreased with increasing pH of solution. The maximum adsorption capacities of modified Mt with amino acid was 5 times larger than unmodified Mt. The regeneration studies were carried out up to 10 cycles for modified Mt and obtained results showed that modified adsorbent could also be effectively used for anionic pollutant removal from surface water for multiple adsorption-desorption cycles.
adsorption, Montmorillonite, amino acid, anionic pollutant, water