Tannin rigid foams were synthesized at lab scale in order to confirm their feasibility in wastewater treatment.
Different water samples containing three emerging contaminants (Methylene blue, Polyoxyethylene
(3.5) sodium lauryl ether sulfate and Trimethoprim) were subjected to adsorption process with these
novel products. The experimental results confirmed the ability of these foams for removing anionic and
cationic contaminants through adsorption process. Kinetic data were adjusted to Lagergren, Ho and Elovich
model. Both the second and the third one presented an average r
2 above 0.96. Equilibrium studies on
the three studied systems revealed Langmuir and Freundlich models were also adequate for predicting
the behavior of the adsorption process. High adsorption capacities were reached (ca. 215, 65 and
25 mg g1 for dye, surfactant and pharmaceutical respectively), which were comparable to other commercial
adsorbents already available and functional in wastewater treatments. Therefore, this new ability
must be added to the list of advantages these new materials seem to present.
Tannin rigid foams were synthesized at lab scale in order to confirm their feasibility in wastewater treatment.Different water samples containing three emerging contaminants (Methylene blue, Polyoxyethylene(3.5) sodium lauryl ether sulfate and Trimethoprim) were subjected to adsorption process with thesenovel products. The experimental results confirmed the ability of these foams for removing anionic andcationic contaminants through adsorption process. Kinetic data were adjusted to Lagergren, Ho and Elovichmodel. Both the second and the third one presented an average r2 above 0.96. Equilibrium studies onthe three studied systems revealed Langmuir and Freundlich models were also adequate for predictingthe behavior of the adsorption process. High adsorption capacities were reached (ca. 215, 65 and25 mg g1 for dye, surfactant and pharmaceutical respectively), which were comparable to other commercialadsorbents already available and functional in wastewater treatments. Therefore, this new abilitymust be added to the list of advantages these new materials seem to present.
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