Permanganate Water Treatment
Permanganate (MnO₄–) is widely used in water treatment for its strong oxidizing properties, helping to remove contaminants and improve water quality. Permanganate is provided in two forms, potassium permanganate as a solid particle (98%) and sodium permanganate as a liquid solution (40%). Each works identically depending on the method of application.
1. Oxidation of Contaminants
- Iron (Fe²⁺) & Manganese (Mn²⁺) Removal:
- Oxidizes soluble iron and manganese into insoluble particles, which can then be filtered out.
- Hydrogen Sulfide (H₂S) Removal:
- Reacts with hydrogen sulfide to eliminate its characteristic “rotten egg” smell.
- Organic Matter & Color Reduction:
- Breaks down organic compounds, reducing color and improving taste.
- Algae & Biofilm Control:
- Helps control algae growth in reservoirs and water systems.
- Disinfection Aid:
- Can help reduce bacterial growth, but it is not a standalone disinfectant like chlorine.
2. Application Methods
- Pre-Treatment in Water Plants:
- Added before filtration to oxidize iron, manganese, and sulfides.
- Well Water Treatment:
- Used in conjunction with filtration to remove natural contaminants.
- Wastewater Treatment:
- Helps control odors and break down pollutants before discharge.
3. Considerations & Safety
- Proper Dosing is Essential: Overdosing can lead to pink or purple water due to residual permanganate.
- Residuals Must Be Removed: Requires filtration to remove oxidized particles.
- Handling Precautions: A strong oxidizer that can stain and be harmful in high concentrations.