Removal of Remazol Black B Dye by Electrocoagulation Process Coupled with Bentonite as an Aid Coagulant and Natural Adsorbent

سال انتشار: 1396
محل انتشار: فصلنامه بهداشت، ایمنی و محیط زیست، دوره: 5، شماره: 3
کد COI اختصاصی: JR_IJHSE-5-3_001
زبان مقاله: انگلیسی
تعداد مشاهده: 432

نویسندگان

Department of Environmental Health Engineering, School of Public Health, Social Development & Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran

Ali Pakfetra

Department of Environmental Health Engineering, School of Public Health, Research Committee, Gonabad University of Medical Sciences, Gonabad, Iran

Morvarid Irani

Department of Midwifery, School of nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, Iran

چکیده

Coloured discharge effluent into aquatic ecosystems may be carcinogenic and mutagenic besides aesthetic problems. In this work, the ability to remove (Remazol Black B) coloured water using electrocoagulation process is equipped with iron and aluminium electrodes with bentonite as a coagulant aid and natural adsorbent has been investigated. Remazol Black B was selected as a model dye and the treatment process was performed in a batch of electrocoagulation (EC) cell using iron and aluminium electrodes and bentonite. Experiments were conducted at 5 levels of various operational parameters at bench scale. The initial dye concentration was varied between 200-1200mg/L, pH ranging from 2-10; the retention time was between 0-60 minutes, the voltage studied was in the range of 5-30 V and the electrical conductivity was 0.25 to 2 Siemens/cm. Results showed that the use of electro-Aluminum and Iron, under optimum conditions of pH 2 and 4, the concentration of dye1000mg/L, the voltage of 30V and 30 min have the maximum dye removal of about 99% and 91%, respectively. Results showed that both electrode voltages increase the efficiency of the above process in paint removal with decreasing pH from 10 to 2 and increasing the voltage from 5 to 30 V. Results show that by electrocoagulation Process Coupled with Bentonite as an Aid Coagulant could be used as well as an effective method for dye removal from colored wastewater.

کلیدواژه ها

Bentonite, Electrocoagulation, Iron Electrodes and Aluminum Electrodes, Color Removal, Remazol Black B

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