A water treatment method utilizing a continuous flow material recovery system to facilitate removal of contaminant ions

Abstract

A continuous flow material recovery (CFMR) system was investigated for use in tandem with a magnetite (Fe3O4) adsorbent for the removal of contaminant ions from waters. The CFMR was assessed by examining the effects of flow rate, Cu(II) concentration, and Fe3O4 dose. Experiments indicated that low flow rates, under 3 Lpm, were ideal for minimizing release of Fe3O4 and maximizing saturation time of the Fe3O4 capture system. Over 98 % Fe3O4 recovery was observed near ideal conditions. Further experimentation revealed Fe3O4 capture efficiencies between 38 and 93 %, Cu(II) removal between 80 and 99 %, and loading up to 20 mg Cu(II)/g Fe3O4. Additionally, magnetite adsorption was evaluated by treating water samples from the Clark Fork River, located in southwestern Montana. Many contaminants tested were removed to below water quality criteria or instrument detection limits. This study poses a potential solution for water pollution, with the ability to be modified for applications such as environmental remediation and wastewater treatment, and demonstrates an efficient water treatment process for real-world applications. Ultimately, the study aims to establish CFMR operating conditions that minimize Fe3O4 loss to the environment and assess Fe3O4 adsorption capabilities on real water samples.