Metals removal using ozone

Ozone can do more than disinfection and oxidation of chemical contaminates.  Ozone can also be used as a flocculant to aid in filtration of metals from water.  It is common to use ozone to remove iron and manganese from water, but what about other metals?

The paper shown below provides confirmation that ozone has the ability to also remove Lead, Copper, Arsenic, Zinc, and Cadmium from water.  Using ozone for per-treatment and filtration these metals were all removed from water at varying degrees dependent upon ozone dosage rate and filtration efficiency.

This is one more application for ozone in drinking water applications, and potentially for groundwater remediation applications.

Read abstract for paper below, link to purchase entire paper here

Pilot Testing Of Trace Metals Removal With Ozone At Snowbird Ski Resort

Author Eva Nieminski, Doug Evans
Year 1995
Location Volume 17 Issue 3 Pages 297 – 309
DOI 10.1080/01919519508547537

Ozone Science and Engineering Journal Cover

A pilot study at the Snowbird Ski Resort in Utah evaluated feasibility of ozonation replacing chlorine and sulfur dioxide for oxidation of iron and manganese in groundwater. Ozonation also was tested for the removal of lead and cadmium, occurring at concentrations exceeding drinking water Maximum Contaminant Levels. An ozone dose of 2 mg/L, contacted with the water for 1 minute prior to filtration, was selected as optimum for iron and manganese removal from 0.4 mg/L and 40 microg/L, respectively, to below detection limits. Lead, copper, and arsenic also were removed to below detection limits. The removal of cadmium and zinc improved when ozone was contacted for 10 minutes. With metals removal through ozonation and filtration, taste and odor enhancement also were reported.