Adsorption of chromium (VI) from aqueous solution by sugar beet bagasse‐based activated charcoal

Abstract

Chromium (VI) is known to be potentially carcinogenic and mutagenic in humans. A low-cost industrial solid bioadsorbent, bagasse-based activated charcoal (BAC), has been investigated for removal of chromium from aqueous solution. All the experiments were carried out in batch process with laboratory-prepared samples to study the effects of adsorbent dose, contact time, pH and initial concentration of Cr(VI). The removal of chromium ion was found to be highly dependent on the pH of the solution, adsorbent dose and contact time. Also the equilibrium adsorption was analyzed by the Freundlich and Langmuir isotherm models. It was found that the Freundlich isotherm model best described the sorption of chromium by sugar beet bagasse-based activated charcoal (r2 > 0.9927). Experimental data of kinetic studies were fitted to pseudo-first-order, pseudo-second-order and modified pseudo-first-order models. The results showed pseudo-second order kinetics was best fitted to the collected data (r2 > 0.9893). Optimum conditions for adsorption were determined at pH 2 and a contact time of 180 minutes (92.7% removal). These retention capacities suggest that BAC can provide a simple, effective, and cheap method for removing Cr(VI) ions from effluents and water resources.

The Suitability of Jatropha Seed Press Cake as a Biosorbent for Removal of Hexavalent Chromium from Aqueous Solutions

“…This technology is based on the capacity of many biological materials to bind and remove heavy metals from aqueous effluents (Vieira and Volesky 2000;Volesky 2001). It employs the use of various divergent biomass, such as algae (Rathinam et al 2010), seaweeds (Baral et al 2008), bacteria (Wang et al 2010), fungi (Ahluwalia and Goyal 2010), agrowastes including husk (Boucher et al 2008), fibers (Makehelwala et al 2009), sawdust (Ting et al 2010), tea waste (Prabhakaran, Vijayaraghavan, and Balasubramanian 2009), bagassae (Samadi et al 2009), seed cake (Boucher et al 2008;Fernando et al 2009), etc. Seed cakes are the secondary by-product generated after the oil extraction from oleaginous seeds, which are poorly utilized.…”

Application of acidic treated pumice as an adsorbent for the removal of azo dye from aqueous solutions: kinetic, equilibrium and thermodynamic studies

“…Adsorption is a key process that is used for the removal of pollutants from wastewater for its low cost, easy application and effectiveness [10]. Commercial activated carbon is the most common adsorbent that has been implemented in this process.…”

Adsorption kinetic studies for removal of methylene blue using activated carbon prepared from sugar beet pulp

“…Sugar beet pulp has a respectable content of cellulose, hemicellulose and lignin, which was suitable for preparation of AC. To our knowledge, some researchers have used sugar beet pulp as starting material to prepare AC and investigated their adsorption properties (Ozer and Tumen 2003;Samadi et al 2009;Demiral and Gündüzoglu 2010;Dursun et al 2013), and few literatures focused on the separation of dyes, but only for heavy metal removal.…”