Modeling and Statistical Analysis of Malachite Green Dye Removal from Aqueous Solutions by Activated Carbon Powder Prepared from Pine Bark (Modified by Sulfuric Acid) - Application of Response Surface Methodology
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2016, Vol 10, Issue 1
Abstract
Nowadays, the adsorption process has been recognized as one of the best ways to removing of dye pollutants from wastewater industry. This study was to evaluate the efficiency of activated carbon powder processed from pine bark (raw absorbent and adsorbent treated with sulfuric acid), in removing of malachite green dye from aqueous solutions (with application response surface method). Adsorbent was treated using sulfuric acid with a purity of 98% at 1, 6 and 12 normality. Run of experiments (sample size required) was determined using Design of Expert software (DOE). Based on the variables range, 20 Run experiments was obtained for each adsorbent, and considering the use of four adsorbents and three times repetition for each Run, 240 experiments were obtained in total. Experiments were established at follow condition: constant concentration of dye (85 mg/L), adsorbent dose (2.0, 5.0, 8.0, 1.1 and 4.1 g/L), contact time (15, 30, 45, 60 and 75 min) and pH (3, 5, 7, 9 and 11). The results showed that the use of sulfuric acid as a modifier cannot significance increasing of efficiency activated carbon sorbent made from pine trees. And even increasing of sulfuric acid normality for treatment of adsorbent has revers result so that afford reducing of adsorbent efficiency. Therefore, 3 – 4% increasing of efficiency (with the modify effect of sulfuric acid 1 and 6 normal) cannot be considered as a cost-effective process than the raw activated carbon. Based on the results, the contact time hasn’t significant effect on malachite green adsorption by adsorbents. While the pH and adsorbent dosage parameters have significant effect in terms of dye adsorption, and with regard to relevant coefficient of regression models, the effect of adsorbent dosage is greater than the effect of pH.
Authors and Affiliations
Ali Almasi| Environmental Health Engineering Department, Public Health School, Kermanshah University of Medical Sciences, Kermanshah, Iran, Meghdad Pirsaheb| Environmental Health Engineering Department, Public Health School, Kermanshah University of Medical Sciences, Kermanshah, Iran, Sohrab Allafpour haghighi *| Environmental Health Engineering Department, Public Health School, Kermanshah University of Medical Sciences, Kermanshah, Iran, email: sohrab191919@yahoo.com, Kiomars sharafi| Environmental Health Engineering Department, Public Health School, Kermanshah University of Medical Sciences, Kermanshah, Iran, Environmental Health Engineering Department, Public Health School, Tehran University of Medical Sciences, Tehran, Iran, Masoud Moradi| Environmental Health Engineering Department, Public Health School, Kermanshah University of Medical Sciences, Kermanshah, Iran, Environmental Health Engineering Department, Public Health School, Iran University of Medical Sciences, Tehran, Iran, Yahya Jabari| Environmental Health Engineering Department, Public Health School, Kermanshah University of Medical Sciences, Kermanshah, Iran
Keywords
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