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Information Seminar Paper

Title

REMOVAL OF AZO METAL COMPLEX DYE FROM AQUEOUS SOLUTION BY THE COMPOSITE OF MAGNETITE NANOPARTICLES AND POWDER ACTIVATED CARBON

Pages

 Start Page | End Page

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Abstract

 ENTRANCE OF INDUSTRIAL WASTEWATER INTO SURFACE AND UNDERGROUND WATER RESOURCES IS ONE OF THE MOST SERIOUS ENVIRONMENTAL PROBLEMS. AMONG REMOVAL METHODS OF ORGANIC AND INORGANIC POLLUTANTS FROM INDUSTRIAL WASTEWATER, ADSORPTION USING ACTIVATED CARBON POWDER IS AN EFFECTIVE METHOD. HOWEVER, THIS PROCESS HAS SOME LIMITATIONS SUCH AS DIFFICULTIES IN REGENERATION OF POWDER ACTIVATED CARBON FROM AQUEOUS SOLUTION. TO OVERCOME THIS DRAWBACK, COMPOSITE OF POWDER ACTIVATED CARBON WITH MAGNETITE NANOPARTICLES CAN BE APPLIED. IN THIS RESEARCH, WE FIRST SYNTHESIZED MAGNETITE NANOPARTICLES AND THEN STABILIZED THEM ON THE SURFACE OF ACTIVATED CARBON POWDER AND CHARACTERISTICS OF THE PREPARED NANO COMPOSITE WERE DETERMINED USING XRD, SEM ANALYSIS. FOR INCREASING THE REMOVAL EFFICIENCY OF THE NANO COMPOSITE, FIRST THE DESIRED RATIO OF FE3O4/PAC OF IRON OXIDE CONTENT OF THE 1/1, 1/2, 1/3, 1/4 WAS DETERMINED AND IN THE REST OF THE EXPERIMENTS THIS RATIO WAS APPLIED. THE EXPERIMENTAL RESULTS SHOWED THAT THE NANO COMPOSITE PREPARED WITH THE FE3O4/PAC RATIO OF ½ HAD THE BEST EFFICIENCY. MOREOVER, THE EFFECT OF DIFFERENT FACTORS IN ADSORPTION SUCH AS THE AMOUNT OF THE USED COMPOSITE, SOLUTION TEMPERATURE, PH AND COMPOSITE CONTACT TIME WAS INVESTIGATED. THE RESULTS SHOWED THAT THE REMOVAL PERCENTAGE REACHED ITS HIGHEST LEVEL AT THE HIGHER AMOUNT OF THE USED COMPOSITE, TEMPERATURE AND LOWER ACIDIC PHS OF SOLUTION. FOR EVALUATING THE NANO COMPOSITE EFFICIENCY, ITS ACID BLUE 193 DYE REMOVAL PERCENTAGE WAS COMPARED TO THAT OF THE SAME AMOUNT OF ITS COMPONENTS. THE RESULT INDICATED THAT AT THE SAME EXPERIMENTAL CONDITION THE REMOVAL EFFICIENCY OF THE FE3O4/PAC NANO COMPOSITE (%53.24) WAS HIGHER THAN THE SUM OF THE REMOVAL EFFICIENCY OF THE FE3O4 (%36.38) AND WAS LOWER THAN THE SUM OF THE REMOVAL EFFICIENCY OF THE PAC (%78.45). THE KINETICS OF PROCESS ADSORPTION ALSO INVESTIGATED IN THIS STUDY. ACCORDING TO THE EXPERIMENTAL RESULTS, THE ADSORPTION PROCESS USING FE3O4/PAC NANO COMPOSITE FOLLOWED A PSEUDO-SECOND ORDER REACTION. FURTHERMORE, THE DYE ACID BLUE 193 ADSORPTION PROCESS USING FE3O4/PAC NANO COMPOSITE WAS MODELED AND OPTIMIZED USING RESPONSE SURFACE METHODOLOGY AND THE EFFECT OF AMOUNT OF THE USED COMPOSITE, SOLUTION TEMPERATURE, PH AND COMPOSITE CONTACT TIME ON ADSORPTION PROCESS WAS INVESTIGATED. THE OPTIMUM CONDITION OBTAINED FOR THE PARAMETERS ARE AS FOLLOW, RESPECTIVELY: 0.05G, 400C, 3 AND 75MIN. THE ADSORPTIVE ISOTHERMS FOR DYE ACID BLUE 193 WITH ACTIVATED CARBON AND THE COMPOSITE ADSORBENT ALL MATCH THE LANGMUIR MODEL BETTER THAN FREUNDLICH MODEL. THE EFFECT OF PH ON THE DESORPTION OF FE3O4/PAC WAS INVESTIGATED. HIGH FE3O4/PAC DESORPTION EFFICIENCY WAS ACHIEVED AT HIGH PH VALUE.

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