Sulfate Reduction and Heavy Metals Removal from Industrial Wastewater via Advanced Calcium-Aluminum Precipitation Method | ||||
| Egyptian Journal of Chemistry | ||||
| Article 8, Volume 63, Issue 5, May 2020, Page 1697-1712 PDF (1.73 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2019.18501.2145 | ||||
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| Authors | ||||
M. Hamdy El Awady   1; Mona Abdelaziz Ahmed2; A. A. Dahaba3
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| 1Water pollution research department, environmental research division, National Research Centre | ||||
| 2Department of Chemistry, Faculty of Women for Arts, Science and Education, Ain Shams University, Egypt | ||||
| 3Water Pollution Research Department, Environmental Researches Division, National Research Center, Dokki, Egypt | ||||
| Abstract | ||||
| The reduction of sulfate ions from the industrial wastewater using advanced calcium-aluminum precipitation method (ACAPM) has been evaluated. The ACAPM involved the precipitation of sulfate ions as minerals like gypsum and ettringite via calcium/ aluminum compounds. Factors affecting the reduction of sulfate ions such as: pH, Ca(OH)2 and NaAlO2 dosages have been investigated, while the optimal experimental conditions for sulfate ions reduction were determined. The precipitated solids have been characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive spectroscopy (EDS), respectively. Experimental results indicate that the ACAPM was effectively reduced sulfate with removal efficiency exceed 98%. It also effectively removed heavy metals including: Cr, Ni, Cd, Pb, Fe, Mn & Zn, with removal efficiencies up to 99%. Results showed that the ACAPM has remarkable sulfate ions removal efficiency with high concentrations. | ||||
| Keywords | ||||
| Sulfate Reduction; Industrial Wastewater; chemical treatment; Heavy Metals Removal | ||||
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