10.6084/m9.figshare.8248844.v1 Nahid Sandikly Nahid Sandikly Mounir Kassir Mounir Kassir Mouhieddine El Jamal Mouhieddine El Jamal Hosni Takache Hosni Takache Philippe Arnoux Philippe Arnoux Samia Mokh Samia Mokh Mohammad Al-Iskandarani Mohammad Al-Iskandarani Thibault Roques-Carmes Thibault Roques-Carmes Comparison of the toxicity of waters containing initially sulfaquinoxaline after photocatalytic treatment by TiO<sub>2</sub> and polyaniline/TiO<sub>2</sub> Taylor & Francis Group 2019 Photocatalysis Titanium dioxide polyaniline toxicity sulfaquinoxaline 2019-06-10 16:32:49 Journal contribution https://tandf.figshare.com/articles/journal_contribution/Comparison_of_the_toxicity_of_waters_containing_initially_sulfaquinoxaline_after_photocatalytic_treatment_by_TiO_sub_2_sub_and_polyaniline_TiO_sub_2_sub_/8248844 <p>This paper addresses the residual toxicity of waters after photocatalysis treatments<i>.</i> The initial waters contain 7 mg L<sup>−1</sup> of sulfaquinoxaline (SQX) which is a sulfonamide antibiotic generally recorded inside the water. The contaminated waters are treated by photocatalytic degradation process with bare titania and titania covered with polyaniline (PANI) conducting polymer. The degradation of SQX is conducted at different pH in order to find the optimal condition to obtain SQX concentration relatively equal to zero in the shortest amount of time. This occurs for PANI/TiO<sub>2</sub> at pH 12 and TiO<sub>2</sub> at pH 4. Toxicity assays (concentration of biomass, pigmentation tests, and cells counting) are undertaken on the microalgae <i>Chlorella vulgaris</i> in order to evaluate the residual toxicity of the 2 treated waters. The toxicity results highlight that the water treated by PANI/TiO<sub>2</sub> at pH 12 is the less toxic towards the algae cells. The water processed by bare titania at acidic pH displays unneglectable toxicity towards the algae cells which are larger than the toxicity of the original SQX solution.</p>