Optimum treatment of groundwater of high salinity and high radioactive contamination

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Optimum treatment of groundwater of high salinity and high radioactive contamination

Optimum treatment of groundwater of high salinity and high radioactive contamination

M. Gamal Khedr

A pilot investigation was conducted for determination of the adequate technology for production of 12,000 m3/d of drinking water out of a groundwater of total dissolved solids TDS, of 9,313 mg/l having a rather high NORM, naturally occurring radioactive material, contamination by combined radium isotopes Ra226,228 of 207.1 ± 20.2 pCi/l. While brackish water reverse osmosis, RO, enabled efficient rejection of salinity to the World Health Organization norm of TDS ≤ 500 mg/l adopted by the project local authority, it failed to decontaminate the water to the Maximum Contaminant Level for drinking water of ≤ 5 pCi/l combined radium according to the US, Environmental Protection Agency. A comparative investigation of alternative pretreatments of water ahead of RO by nanofiltration, NF, cation exchange resins, CER, and adsorption on the active surface of hydrous manganese oxide, HMO, was conducted so as to lower the concentration of the contaminant radioisotope in the RO feed. While all the selected pretreatments resulted in sufficient lowering of the Ra activity, the comparison of the process efficiency, cost effectiveness and environmental safety revealed that the optimum technology for water treatment in the present case is the hybrid membrane process NF/RO...

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To cite this article: Khedr MG. Optimum treatment of groundwater of high salinity and high radioactive contamination. Journal of Desalination and Water Purification 2016;5:1-2.

To link this article: http://ababilpub.com/download/jdwp5-1/