European Journal of Experimental Biology Open Access

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Adsorption of brilliant green by poly (ethylene terephthalate) grafted acrylic acid /acryl amide fiber-isotherm study

Homayon Ahmad Panahi, Nika Shakerin, Farahnaz Zolriasatain, Ataolah Panahyab and Elham Moniri

A fibrous adsorbent was prepared by grafting Acrylic acid /Acryl amide co-monomers onto poly(ethyleneterephthalate) fibers. The resulting sorbent has been studied for removal of trace brilliant green from aqueous solution. The optimum pH value for sorption of the brilliant green was 6. The sorption capacity of functionalized fiber is 65.5 mg g−1. Scatchard analysis revealed that the homogeneous binding sites were formed in the polymers. The equilibrium adsorption data of brilliant green on modified fiber were analyzed by Langmuir, Freundlich, Temkin and Redlich–Peterson models. Based on equilibrium adsorption data, the Langmuir, Freundlich and Temkin constants were determined 0.032 (m3 kg-1), 4.92 (mkg kg-1) (m3 kg-1)1/n and 1.777 (L g-1) at pH 6 and 20 °C, respectively. Based on Redlich–Peterson Isotherm analysis, Langmuir isotherm best-fit the equilibrium data for adsorption of brilliant green.