Browsing by Author "Halliche, Djamilla"

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    Equilibrium and kinetic studies of anionic surfactant removal by adsorption and photocatalytic degradation using hydrotalcite-like compounds and their calcined products
    (ACADEMIA ROMÂNĂ, 2019) Aoudjit, Farid; Cherifi, Ouiza; Halliche, Djamilla
    Due to the abundant use of anionic surfactants in our life and their disposal in the environment, the removal of surfactants from waste water becomes necessary. The present study focused to the synthesis and application of layered double hydroxides and their derived oxides to remove the anionic surfactant, sodium dodecyl sulphate (SDS), from aqueous solution by adsorption and photocatalytic degradation under UV irradiation. The influencing of Zn2+/Al3+ molar ratio and initial SDS concentration on the adsorption and photocatalytic degradation of SDS are studied and optimized. The obtained adsorption data were correlated with Langmuir and Freundlich isotherms models. Equilibrium studies indicated that the SDS removal obeyed Langmuir type of adsorption. Kinetic data were better described by pseudo-second-order model. The photocatalytic degradation of SDS has been found to fit the first-order kinetics according to the Langmuir–Hinshelwood model.
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    Simultaneously efficient adsorption and photocatalytic degradation of sodium dodecyl sulfate surfactant by one-pot synthesized TiO2/ layered double hydroxide materials
    (Taylor and Francis Online, 2019) Aoudjit, Farid; Cherifi, Ouiza; Halliche, Djamilla
    The large amount of surfactants discharge into wastewater are harmful for both terrestrial and aquatic life; in fact the removal of surfactants from wastewater becomes necessary. The present study is focused on to the removal of sodium dodecyl sulphate surfactant (SDS) by adsorption and photocatalytic degradation using Zn(2)Al-LDH and TiO2/Zn(2)Al-LDH materials synthesized by coprecipitation. The experimental adsorption data obtained were evaluated using Langmuir Freundlich and Temkin isotherms models. The photocatalytic degradation activities of SDS at different concentration in the range of (10−100 mg/L) over Zn(2)Al-LDH and TiO2/Zn(2)Al-LDH follows the pseudo first-order kinetics in accordance with the Langmuir Hinshelwood model. The results indicated that TiO2(3.6)/Zn(2)Al-LDH show the highest photocatalytic activity compared to Zn(2)Al-LDH sample