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In the present study, Acutodesmus obliquus strain PSV2 was isolated from a textile and dyeing industrial site and investigated as a cost effective and potential adsorbent for Acid red 66 dye. Batch kinetic experiments were carried out as a function of pH (1.0 - 6.0), contact time (0 - 180 min) and initial dye concentration (10 - 50 mg/L) to determine the decolorization efficiency of microalgae. The maximum adsorption of dye was observed at pH 2.0 during the initial 60 min of contact time. The Langmuir and Freundlich adsorption isotherms were applied to experimental data to investigate the efficiency of adsorbent and mechanism of adsorption. It was observed that Langmuir and Freundlich isotherm fitted well with Acid Red 66 dye data. Langmuir isotherm, described maximum adsorption of dye (44.24 mg/g) with good correlation coefficient (r2 = 0.980) while Freundlich isotherm showed a high correlation coefficient (r2 = 0.994) with value of n greater than unity (n = 1.27). The present study showed that Acutodesmus obliquus strain PSV2 is an eco friendly and highly efficient adsorbent for removal of acid red 66 dye from dyeing and textile industrial wastewater.

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Adsorption of Acid Red 66 Dye from Aqueous Solution by Green Microalgae &lt;i&gt;Acutodesmus obliquus&lt;/i&gt; Strain PSV2 Isolated from an Industrial Polluted Site