Removal of Tannic Acid From Aqueous Solution by Cloud Point Extraction and Investigation of Surfactant Regeneration by Microemulsion Extraction

Halima Ghouas (1) , Boumediene Haddou (1) , Mostéfa Kameche (1) , Jean-Paul Canselier (2) , Christophe Gourdon (2)

1 Laboratoire Physique-Chimie des Matériaux Catalyse et Environnement - LPCME (Oran, Algérie)
2 LGC - Laboratoire de Génie Chimique

The aim of this work is the extraction of tannic acid (TA) with two commercial nonionic surfactants, separately: Lutensol ON 30 and Triton X-114 (TX-114).The experimental cloud point extraction results are expressed by four responses to surfactant concentration and temperature variations: extent of TA extraction (E), remaining solute (X s,w) and surfactant (X t,w) concentrations in dilute phase and volume fraction of coacervate (Φc) at equilibrium. An empirical smoothing method was used and the results are represented on three dimensional plots. In optimal conditions, the extraction extent of TA reaches 95 and 87 % using TX-114 and Lutensol ON 30, respectively. Sodium sulfate, cetyltrimethylammonium bromide (CTAB) addition and pH effect are also studied. Finally, the possibility of recycling of the surfactant is proved.

Mots clés: Extraction; Tannic acid; Nonionic surfactant; Coacervate; Cloud point; Microemulsion

Domaines: Génie chimique; Génie des procédés

Halima Ghouas, Boumediene Haddou, Mostéfa Kameche, Jean-Paul Canselier, Christophe Gourdon. Removal of Tannic Acid From Aqueous Solution by Cloud Point Extraction and Investigation of Surfactant Regeneration by Microemulsion Extraction. Journal of Surfactants and Detergents, 2016, 19 (1), pp.57-66. ⟨10.1007/s11743-015-1764-9⟩. ⟨hal-01912001⟩