Investigation of the effects of salinity and temperature on the removal of iron from water by aeration, filtration, and coagulation
The use of geothermal water is becoming more and more popular for technological applications. But before this application water must be treated. Iron compounds cause precipitation of technical devices, which in turn reduces their efficiency. That is why we need to know how high temperatures and salinity effect water treatment. This paper determines the effectiveness of the iron removal process using four methods: aeration, aeration and filtration, aeration with coagulation, and coagulation, which were measured experimentally. The paper presents a procedure to optimize the coagulant dose and method of preparation of water model. Efficiency of iron removal was measured by the total iron concentration in raw and treated water model. It was shown that the effect of coagulation was the best method of iron removal with effectiveness up to 98-99.5%. Iron removal decreases with increasing salinity. Higher temperatures do not affect the process of iron removal in water.
- 1. KAPUŚCIŃSKI J., RODZOCH A. Low-temperature Geothermal Energy in Poland and in the world. Ministerstwo Ochrony Środowiska, Warszawa, pp. 66, 2010.
- 2. SHANNON M.A., BOHN P.W., ELIMELECH M., GEOR- GIADIS J.G., MARINAS B.J., MAYES A.M. Science and technology for water purification in the coming decades. Nature, 452, 301, 2008.
- 3. TZOUPANOS N.D., ZOUBOULIS A.J. Coagulation-floc- culation processes in water/waste water treatment: The application of new generation of chemical reagents, 6th IASME/WSEAS International Conference on HEAT TRANSFER, THERMAL ENGINEERING and ENVIRONMENT (HTE'08) Rhodes, Greece, August 20-22, 2008.
- 4. JAVIS P., SHARP E., PIDON M., MOLINDER R., PARSONS S. A., JEFFERSON B. Comparison of coagulation performance and floc properties using a novel zirconium coagulant against traditional ferric and alum coagulants. Water Research, Elsevier, 46, 4179, 2012.
- 5. WOLBORSKA A., ZARZYCKI R., MĘTLEWIAK B. Influence of the type of aluminum coagulant on treated water quality. Ochrona Środowiska, 4, 25, 1999.
- 6. GUMIŃSKA J., KŁOS M. Possibilities study of coagulation process optimizing - experience from operation of technological systems with sedimentation and dissolved air flotation. Gaz, woda i technika sanitarna, 5, 195, 2011.
- 7. KŁOSOK-BAZAN I. Model study on deironing of geother- mal water for balneological and recreation use. Technika Poszukiwań Geologicznych, Geotermia, Zrównoważony Rozwój, 1, 123, 2013.
- 8. SUN-JONG L., YOON JIN L., SANG-HO N. Improvement in the coagulation performance by combining Al and Fe coagulants in water purification. Korean J. Chem. Eng., 25, (3) 505, 2008.
- 9. ŚWIDERSKA-BRÓŻ M., KRUPIŃSKA J. Efficiency of the Coagulation Process in Removing Organic Substances from Groundwater. Ochrona Środowiska, 3, (86), 15, 2002.
- 10. GUMIŃSKA J., KŁOS M. Optimizing the coagulant dose for surface Water Treatment by Means of Particle Number Measurement. Ochrona środowiska, 3, (31), 25, 2009.
- 11. SOBCZYŃSKI T., JONIAK T., The Variability and Stability of Water Chemistry in a Deep Temperate Lake: Results of Long-Term Study of Eutrophication. Pol. J. Environ. Stud. 22, (1), 227, 2013.
- 12. ŚWIDERSKA-BRÓŻ M., KOWAL A. Water treatment. Wydawnictwo Naukowe PWN, Warszawa-Wrocław, pp. 195, 2000.
- 13. Internet resources: www.dempoleco.com
- 14. AHMAD A.L. MAT YASIN N.H., DEREK C.J.C., LIM J.K. Optimization of microalgae coagulation process using chitosan. Chem. Eng. J., 173, 879, 2011.
- 15. SAWINIAK W., KŁOSOK-BAZAN I. Removal of iron from the water at an elevated temperature, Instal 11, 67, 2009.
rekord w opracowaniu