:: Volume 27, Issue 1 (4-2019) ::
sjimu 2019, 27(1): 75-84 Back to browse issues page
Evaluation of Chitosan and Magnesium Oxide Nanoparticles Efficiencies in Removal of Direct Blue 71 and Turbidity
Mahmood Saiedi1, Morteza Karami1, Reza Nemati1, Zahra Soleymani1, Mohammad Mehralian2, Mahsa Moradi 3
1- Dept of Environmental Health Engineering, Faculty of Public Health and Paramedicine, Semnan University of Medical Sciences, Semnan, Iran
2- Dept of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran
3- Dept of Environmental Health Engineering, Faculty of Public Health and Paramedicine, Semnan University of Medical Sciences, Semnan, Iran , mahsamoradi2010@gmail.com
Abstract:   (276 Views)

Introduction: High volumes of wastewater along with contaminants, such as colloids and dyes are discharged from different industries into the environment. These wastewaters create major problems and serious threats for water resources. Therefore, it is essential to treat such wastewaters and reach the effluent discharge standards. In this regard, chitosan as a coagulant has a comparable performance with other coagulants. Moreover, the addition of chitosan and removal of turbidity probably lead to higher efficiency of nanoparticles in lower dosages which is investigated in the current study. Therefore, the purpose of this study was to investigate the efficiency of chitosan and magnesium oxide (MgO) nanoparticles for the removal of color and turbidity.
 
Materials & Methods: Synthetic wastewater was prepared by mixing specific amounts of bentonite and direct blue 71 dye in distilled water. After the preparation of different concentrations of color and turbidity, the experiments were conducted with different dosages of chitosan and MgO separately and in combination. The influence of variables such as pH, initial concentration of dye and turbidity, MgO and chitosan dosages on removal efficiency was investigated in this study.
 
Fidings: According to the results, the highest rate of color and turbidity removal was obtained at 1.5 mg/L chitosan in combination with 1.5 g/L MgO with the efficiency of 97.5%. In addition, the highest removal efficiency was obtained at pH of 7.
 
Discussion & Conclusions: Due to the need for high doses of MgO in high turbidities, the use of chitosan as a coagulant can be effective in reducing the use of MgO.
 
 

Keywords: Nano Magnesium Oxide, Chitosan, Turbidity, Color, Textile wastewater
Full-Text [PDF 733 kb]   (89 Downloads)    
Type of Study: Research |
Received: 2017/05/29 | Accepted: 2018/01/21



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