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Industrial wastewater is considered as one of the major pollutants of the environment [1]. Colored wastewater is produced by various industries, such as textile, dyeing, pharmaceutical, food, cosmetics and healthcare, paper and leather industries [2, 3]. Many dyes and their breakdown products may be toxic for living organisms. Therefore decolorization of dyes is important before the discharge of effluent. Removal of dye has been attempted extensively using physico-chemical methods such as coagulation, ultra-filtration, electro-chemical adsorption, photo oxidation, activated carbon adsorption, etc [5]. But these technologies are not efficient, satisfactory and also cost effective [4]. Adsorption has been shown to be one of the most promising and extensively used methods for the removal of both inorganic and organic pollutants from contaminated water [6, 7]. Use of low cost, easily available biomaterials for the adsorption of dyes is practiced as an alternative method and several botanical, low cost materials have directly been used as an adsorbent for removal of dyes from wastewater [8, 9]. Now days, agricultural waste materials are receiving much more attention as adsorbents for the removal of dyes from waste water due to its low cost and good availability. In the present study, pine apple peel (PAP) has been used as an adsorbent whose results showed good absorption in Rhodamine-B dye aqueous solution [10].

Adsorption of Rhodamine-B Dye from an Aqueous Solution by Biomass Pine Apple Peel: Kinetics, Equilibrium and Thermodynamic Studies