TITLE:
Adsorption of Acid Red 66 Dye from Aqueous Solution by Green Microalgae Acutodesmus obliquus Strain PSV2 Isolated from an Industrial Polluted Site
AUTHORS:
Prakash Sarwa, Ramya Vijayakumar, Sanjay Kumar Verma
KEYWORDS:
Acid red 66 Dye, Microalgae, Acutodesmus obliquus Strain PSV2, Adsorption, Isotherms
JOURNAL NAME:
Open Access Library Journal,
Vol.1 No.3,
June
30,
2014
ABSTRACT: 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.