NITRATE REMOVAL FROM DRINKING WATER BY ION EXCHANGE AND REVERSE OSMOSIS

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TORABIAN A.; HASANI A.H.; SAMAK ABEDI M.

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Journal: JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY Year:2006 | Volume:8 | Issue:3 (30) Page(s): 21-28

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Title

NITRATE REMOVAL FROM DRINKING WATER BY ION EXCHANGE AND REVERSE OSMOSIS

Author(s)

TORABIAN A. | HASANI A.H. | SAMAK ABEDI M. | Issue Writer Certificate

Keywords

NITRATEQ2

DRINKING WATERQ2

ION EXCHANGEQ3

REVERSE OSMOSISQ3

Abstract

NITRATE is one of the major components which is known as a chemical pollutant indicator in water and can be removed by physico-chemical and biological methods. In this study, ION EXCHANGE and REVERSE OSMOSIS processes were studied for NITRATE removal. The REVERSE OSMOSIS system used in this research contained a TFC membrane with the capacity of 300 l/day, a pressure tank, and micro filters measuring 1 and 5 micrometers. Synthetic NITRATE solutions with concentrations of 25, 50, 100, 200 mg/l were injected into the system at a fixed amount of TSD. The ION EXCHANGE column was made of plexy glass with a volumetric rate of 15 BV/hr. NITRATE with concentrations of 25, 50, 100 mg/l and different amounts of TDS (400, 700, 1000 milligrams per liter) were injected into the column. The study lasted for 8 months and the following results were obtained: -- An increase in NITRATE concentration causes a decrease in efficiency from 93.5 to 82.5 percent for the REVERSE OSMOSIS and from 99.7 to 95 percent for the ION EXCHANGE. -- An increase in TDS has a negative effect on efficiency so that the removal efficiency changes from 99.7 to 83 percent in the ION EXCHANGE. --An increase in the other anions like sulfate causes a decrease in efficiency in the ION EXCHANGE system. --The regeneration solution has an effect on the operation of the ION EXCHANGE system. The best removal efficiency is about 99.7 percent, observed at a TDS of 400 when resin is regenerated by sodium hydroxide.--The highest removal efficiency belongs to the NITRATE concentration of 25 milligrams per liter and a TDS of 400 milligrams per liter in both methods: 99.8 percent for the ION EXCHANGE and 93.5 percent for the REVERSE OSMOSIS systems.

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APA: Copy

TORABIAN, A., HASANI, A.H., & SAMAK ABEDI, M.. (2006). NITRATE REMOVAL FROM DRINKING WATER BY ION EXCHANGE AND REVERSE OSMOSIS. JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 8(3 (30)), 21-28. SID. https://sid.ir/paper/87283/en

Vancouver: Copy

TORABIAN A., HASANI A.H., SAMAK ABEDI M.. NITRATE REMOVAL FROM DRINKING WATER BY ION EXCHANGE AND REVERSE OSMOSIS. JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY[Internet]. 2006;8(3 (30)):21-28. Available from: https://sid.ir/paper/87283/en

IEEE: Copy

A. TORABIAN, A.H. HASANI, and M. SAMAK ABEDI, “NITRATE REMOVAL FROM DRINKING WATER BY ION EXCHANGE AND REVERSE OSMOSIS,” JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, vol. 8, no. 3 (30), pp. 21–28, 2006, [Online]. Available: https://sid.ir/paper/87283/en

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