Alaa Mohamad Soubh(1)* and Mohamad Ghalebizade(2)
(1). School of Environment, College of Engineering, University of Tehran, Tehran, Iran.
(2). Civil and Environmental Engineering Faculty, Tarbiat Modares University, Iran.
(*Corrsponding author: Dr. Alaa Mohamad Soubh. E-Mail: soubh@ut.ac.ir )
Received: 19/10/2020 Accepted: 08/11/2020
Abstract
Methylene blue (MB) is the most commonly used substance for dyeing cotton, wood and silk. The removal of this substance from colored effluent has become the biggest problem for textile industry. The purpose of this research is to investigate the performance of advanced oxidation process – radical sulfate through the activation of persulfate (PS) by converter sludge (CS) to remove methylene blue of aqueous solutions. It was conducted in a batch reactor. The performance of nanomaterials obtained from the converter sludge of Esfahan Steel Company, Iran was investigated for persulfate activation . Scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) analysis are used to investigate the surface morphology and to examine the surface elemental composition of converter sludge. X-ray diffraction (XRD) patterns of converter sludge were obtained using an X-ray diffractometer. The effects of pH (3-9), CS dosage (0.4-1.6 g L-1), persulfate concentration (1-4 mmol L-1), and reaction time (0-60 min) on the removal of 10 mg L-1 methylene blue. The maximum removal efficiency of methylene blue under optimal operational conditions (pH 3, CS dosage 1.2 g L-1, persulfate concentration 2.5 mmol L-1 and reaction time: 20 min) was 89%.
Key words: Methylene blue, Persulfate, Converter sludge, Radical sulfate, remove.
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