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Adsorptive removal of anionic and non‐ionic surfactants from aqueous phase using Posidonia oceanica (L.) marine biomass
Author(s) -
Ncibi Mohamed Chaker,
Mahjoub Borhane,
Seffen Mongi
Publication year - 2008
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1787
Subject(s) - sorption , posidonia oceanica , aqueous solution , adsorption , chemistry , endothermic process , langmuir adsorption model , biosorption , pulmonary surfactant , biomass (ecology) , nuclear chemistry , chromatography , organic chemistry , geology , ecology , biochemistry , oceanography , ecosystem , seagrass , biology
BACKGROUND: In this study, the capability of low‐cost, renewable and abundant marine biomass Posidonia oceanica (L.) for adsorptive removal of anionic and non‐ionic surfactants from aqueous solutions have been carried out in batch mode. Several experimental key parameters were investigated including exposure time, pH, temperature and initial surfactant concentration. RESULTS: It was found that the highest surfactant adsorption capacities reached at 30 °C were determined as 2.77 mg g −1 for anionic NaDBS and as 1.81 mg g −1 for non‐ionic TX‐100, both at pH 2. The biosorption process was revealed as a thermo‐dependent phenomenon. Equilibrium data were well described by the Langmuir isotherm model, suggesting therefore a homogeneous sorption surface with active sites of similar affinities. The thermodynamic constants of the adsorption process (i.e. Δ G °, Δ H ° and Δ S °) were respectively evaluated as − 8.28 kJ mol −1 , 48.07 kJ mol −1 and − 42.38 J mol −1 K −1 for NaDBS and − 9.67 kJ mol −1 , 95.13 kJ mol −1 and − 174.09 J mol −1 K −1 for TX‐100. CONCLUSION: Based on this research, valorization of highly available Posidonia oceanica biomass, as biological adsorbent to remove anionic and non‐ionic surfactants, seems to be a promising technique, since the sorption systems studied were found to be favourable, endothermic and spontaneous. Copyright © 2007 Society of Chemical Industry