In the present study, the removal of Cr(VI) from aqueous solution using natural adsorbents such as apricot and pistachio tree leaves was investigated. The equilibrium studies were systematically carried out in a batch process, covering various process parameters including contact time, initial concentration of metal ions, adsorbents dosage and pH of the solution. The optimum pH and contact time for maximum adsorption were 2.5 and about 30 min, respectively. The Langmuir, Freundlich and Timken isotherms were used to describe the adsorption equilibrium data. The results indicated that the data fit better to the Freundlich equation than to the Langmuir and Timken equations. Comparing to activated carbon, these natural absorbents are suitable alternative for the adsorption process.
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Cassia Alata Seed Activated Carbon for the Removal of Synthetic Dye Methyl Orange from Waste Water
By G. Usha Nandhini | K. Arivalagan | Subramanian Sivanesan"Cassia Alata Seed Activated Carbon for the Removal of Synthetic Dye Methyl Orange from Waste Water"
Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-1 , December 2017,
peer reviewed journal, call for paper commerce, ugc approved journals in mathemetics
In this study, the activated carbon was prepared from Cassia alata seeds using Hydrochloric acid. Removal of Methyl Orange (MO) was assessed by varying parameters like pH, adsorbent dose, concentration, contact time and temperature. The adsorption efficiency of the prepared activated carbon was estimated by using various isotherms and kinetic equations. The isotherm parameters of the process were determined by using Langmuir and Freundlich isotherm equations. The kinetic parameters were predicted with pseudo first order and pseudo second order equations. The kinetic data confirmed to the pseudo second order kinetic model, suggesting that the rate limiting steps may be chemisorptions. The adsorbent material characterization was done by Fourier Transform Infrared Spectroscopy (FTIR) and morphology of the surface adsorbent was identified with Scanning Electron Microscope (SEM).
