Efficiency of Reverse Osmosis Usage in Drinking Water Depots to Reduce Iron (Fe3+), Copper (Cu2+) and Zinc (Zn2+) Ion Levels

Zul Alfian; M. Arifin  Siahaan; Harry Agusnar

doi:10.32734/jcnar.v6i2.18374

Authors

Zul Alfian Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan, 20155, Indonesia
M. Arifin Siahaan Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan, 20155, Indonesia
Harry Agusnar Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Medan, 20155, Indonesia

DOI:

https://doi.org/10.32734/jcnar.v6i2.18374

Keywords:

Drinking Water Depot, Efficiency, Reverse Osmosis

Abstract

Research on the efficiency of reverse-osmosis drinking water depot to decreased levels of iron (Fe³⁺), Copper (Cu²⁺) and Zinc (Zn²⁺) ions have been done. The raw, the treated, and waste water are filtered using reverse osmosis (RO) three times a week. HNO₃ then was added to the sample until it reached 15 mL. The determination of the concentration of the three ions was performed using atomic absorption spectrophotometer (AAS). The results showed a decrease of Fe³⁺ concentration of 73.21%, for Cu²⁺ decrease by 80.25%, while Zn²⁺ decrease by 82.08%. For waste water obtained iron ion concentration of 0.1794 mg/L, for Cu²⁺ by 0.0239 mg/L, while Zn²⁺ by 0.0962 mg/L.

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