Experimental Study to Remediate Acid Fuchsin Dye Using Laccase-Modified Zeolite from Aqueous Solutions
Ekrem Kalkan1, Hayrunnisa Nadaroglu2, Neslihan Celebi2, Hulya Celik4, Esen Tasgin5
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1Geological Engineering Department, Oltu Earth Sciences Faculty,
Ataturk University, 25400 Oltu-Erzurum, Turkey
2Department of Food Technology, Erzurum Vocational Training School,
Ataturk University, 25240 Erzurum, Turkey
3Department of Chemical Technology, Erzurum Vocational Training School,
Ataturk University, 25240 Erzurum, Turkey
4Department of Pharmaceutical Chemistry, Faculty of Pharmacy,
Agri Ibrahim Cecen University, 04000 Agri, Turkey
5Faculty of Education, Elementary Science Education,
Bayburt University, 69100 Bayburt, Turkey
Submission date: 2014-02-11
Final revision date: 2014-03-01
Acceptance date: 2014-03-28
Publication date: 2015-02-06
Pol. J. Environ. Stud. 2015;24(1):115-124
This paper studies, the removal of acid fuchsin dye from aqueous solutions using zeolite natural material after its modification with laccase from Russulaceae (Lactarius volemus). Batch adsorption experiments were performed as a function of pH, contact time, temperature, and adsorbent dosage. The optimum results were obtained at pH 5, contact time of 60 min, temperature of 60ºC, and an adsorbent dosage of 1.5 mg/mL. The isotherm studies show that the adsorption experimental data are fitted well by Langmuir isotherm model. The adsorption capacity found is 31 mg/g. The kinetics of AFD adsorption on LMZ is best described with the pseudo-first-order kinetics model. Thermodynamic parameters including Gibbs free energy, enthalpy, and entropy changes indicate that the adsorption of Acid Fuchsin dye onto laccase-modified zeolite is feasible, spontaneous, and exothermic. The results show that laccase-modified zeolite can be used as an alternative lowcost adsorbent for dye removal from aqueous solutions.
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