Chromium removal and water recycling from electroplating wastewater through direct osmosis: Modeling and optimization by response surface methodology

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Naghdali Zohreh; Sahebi Soleyman; GHANBARI REZA; Mousazadeh Milad; Hamzeh Ali Jamali

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Journal: Environmental Health Engineering and Management Journal Year:2019 | Volume:6 | Issue:2 Page(s): 113-120

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Title

Chromium removal and water recycling from electroplating wastewater through direct osmosis: Modeling and optimization by response surface methodology

Author(s)

Keywords

Direct osmosis

Chromium removal

Electroplating

Optimization

Abstract

Background: Considering the carcinogenic effects of heavy metals, such as chromium, it is essential to remove these elements from water and wastewater. Direct osmosis is a new membrane technology, which can be a proper alternative to conventional Chromium removal processes. Methods: The wastewater samples were collected from an Electroplating unit, located in Alborz industrial city, Qazvin, Iran. Magnesium chloride was used as the draw solution, and a semipermeable membrane (Aquaporin) was used in this study. The experiments were designed, using response surface methodology (RSM) and central composite design (CCD) with draw solution concentration (0. 5-1. 5 M), feed solution concentration (4-12 mg/L), and experiment time (30-90 minutes) as variable factors. The chromium concentration and water flux were also measured, based on atomic absorption spectrophotometry and water flux equation, respectively. Results: Direct osmosis was highly efficient in Chromium removal and water recycling. Water flux and Chromium removal efficiency were 15. 6 LMH and 85. 58%, respectively, under optimal conditions (draw solution = 1. 27 mol/L, feed solution = 4 mg/L, and experiment time = 90 min). In terms of validity, the results predicted by the quadratic polynomial model were in good agreement with the responses reported in the laboratory. Conclusion: In Direct osmosis, the use of magnesium chloride as the draw solution resulted in the acceptable Chromium removal from Electroplating wastewater. Using this method, chromium concentration in wastewater reduced to a level lower than the discharge standards, established by Iran’ s Department of Environment.

Cites

The performance of TiO2/NaY-zeolite nanocomposite in photocatalytic degradation of Microcystin-LR from aqueous solutions: Optimization by response surface methodology (RSM)

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APA: Copy

Naghdali, Zohreh, Sahebi, Soleyman, GHANBARI, REZA, Mousazadeh, Milad, & , Hamzeh Ali Jamali. (2019). Chromium removal and water recycling from electroplating wastewater through direct osmosis: Modeling and optimization by response surface methodology. ENVIRONMENTAL HEALTH ENGINEERING AND MANAGMENT JOURNAL, 6(2), 113-120. SID. https://sid.ir/paper/349004/en

Vancouver: Copy

Naghdali Zohreh, Sahebi Soleyman, GHANBARI REZA, Mousazadeh Milad, Hamzeh Ali Jamali. Chromium removal and water recycling from electroplating wastewater through direct osmosis: Modeling and optimization by response surface methodology. ENVIRONMENTAL HEALTH ENGINEERING AND MANAGMENT JOURNAL[Internet]. 2019;6(2):113-120. Available from: https://sid.ir/paper/349004/en

IEEE: Copy

Zohreh Naghdali, Soleyman Sahebi, REZA GHANBARI, Milad Mousazadeh, and Hamzeh Ali Jamali, “Chromium removal and water recycling from electroplating wastewater through direct osmosis: Modeling and optimization by response surface methodology,” ENVIRONMENTAL HEALTH ENGINEERING AND MANAGMENT JOURNAL, vol. 6, no. 2, pp. 113–120, 2019, [Online]. Available: https://sid.ir/paper/349004/en

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