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Title

OPTIMIZATION OF SIMULTANEOUS REMOVAL OF METHYLENE BLUE, CRYSTAL VIOLET, AND FUCHSINE FROM AQUEOUS SOLUTIONS BY MAGNETIC ZEOLITE NAY COMPOSITE

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 Start Page | End Page

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Abstract

 REMOVAL OF TOXIC INDUSTRIAL, WATER-SOLUBLE WASTE, PARTICULARLY ORGANIC DYES HAS SIGNIFICANT ENVIRONMENTAL, AND COMMERCIAL IMPORTANCE. UNTREATED DISPOSAL OF COLORED WATER INTO RECEIVING WATER BODY CAUSES DAMAGE TO AQUATIC LIFE AND ALSO SEVERE DAMAGE TO THE HUMAN HEALTH [1] 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 [2].OVER THE YEARS, THE POSSIBILITY OF TECHNIQUES SUCH AS OXIDATIVE DEGRADATION [3], AND ELECTROCOAGULATION [4] HAVE BEEN EXPLOITED, BUT THESE METHODS POSSESS DRAWBACKS DUE TO OF THEIR INAPPLICABILITY TO LARGE-SCALE UNITS ALONG WITH BOTH ENERGY AND CHEMICAL INTENSIVENESS. IN THIS STUDY THE ADSORBENT, MAGNETIC NAY ZEOLITE WAS USED FOR SIMULTANEOUS REMOVAL OF THREE TOXIC CATIONIC DYES, METHYLENE BLUE, CRYSTAL VIOLET, AND FUCHSINE, FROM AQUEOUS SOLUTIONS. THE INFLUENCES OF FIVE PARAMETERS OF PH, TEMPERATURE, TIME, INITIAL DYES CONCENTRATION AND ADSORBENT MASS ON DYES ADSORPTION WERE INVESTIGATED. THE PERCENTAGE OF DYE REMOVAL WAS MATHEMATICALLY DESCRIBED AS A FUNCTION OF EXPERIMENTAL PARAMETERS AND WAS MODELED THROUGH CENTRAL COMPOSITE DESIGN (CCD). ACCORDING TO THE PREDICTED EXPERIMENTS, OPTIMUM CONDITIONS OF 9, 55 °C, 10 MIN, 10 MG.L-1, AND 75 MG, FOR PH, TEMPERATURE, TIME, INITIAL DYES CONCENTRATION, AND ADSORBENT MASS WERE RESULTED RESPECTIVELY. THE MAXIMUM EXPERIMENTALLY ACHIEVED % DYE REMOVAL OF 99.1 ± 0.6, 98.9 ± 0.6, AND 98.8 ± 0.8 WERE OBTAINED WHICH WERE CLOSE TO THE MODEL % DYE REMOVAL PREDICTION OF 99.8, 99.5, 99.7 FOR METHYLENE BLUE, CRYSTAL VIOLET, AND FUCHSINE, RESPECTIVELY. THIS AGREEMENT SHOWED THAT THE CENTRAL COMPOSITE DESIGN MODEL COULD IDEALLY MAKE AN ACCEPTABLE ESTIMATION OF THE PROCESS.

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