Ionic nano copper water treatment experiment at a galamsey site
The environmental crisis caused by illegal mining (galamsey) in Ghana has turned once-potable rivers into “brown waters” of silt and toxic chemicals.
Traditional water treatment often fails to handle the extreme turbidity and heavy metal loads currently found in water bodies like the Birim River.
To combat this, the Environmental Protection Agency (EPA) Ghana, under the leadership of Professor Nana Ama Brown Klutse, is piloting a cutting-edge copper-based ionic nano-liquid technology.
The technology is expected to purify the water with the application of ionic nano copper solution.
This GhanaWeb article seeks to explain how this molecular-level solution works to reclaim heavily polluted waters.
Ghana’s EPA eyes nano-liquid technology in fight against river pollution
The Environmental Protection Agency (EPA) in collaboration with Ghana Standards Authority and other relevant organization have started a pilot of this technology on the Birim River; later to be extended to the Pra, Ankobra and other major rivers in the country.
What is Copper-Based Ionic Nano-Liquid?
At its core, this technology uses nanoparticles (particles so small they are measured in billionths of a meter) suspended in an ionic liquid.
Unlike standard chemicals that simply float in water, ionic liquids are essentially “liquid salts” that exist in a fluid state at low temperatures.
When copper is engineered into this state at a nano-scale, it gains an incredibly high surface-area-to-volume ratio, making it hyper-reactive compared to regular copper.
1. The Composition: Three Parts of a Whole
•Copper (The Active Agent): Copper is naturally antimicrobial and has a high affinity for other metals. In this liquid, it acts as the primary tool for killing bacteria and binding to toxic heavy metals like mercury and lead.
•Ionic Liquid (The Carrier): Unlike water or oil, an ionic liquid is essentially “molten salt” that remains liquid at room temperature. Because it consists entirely of ions (charged particles), it has a powerful electrical pull that keeps the copper stable and helps it interact with contaminants.
•Nano-Scale (The Size): By shrinking the copper particles to a “nano” size (billionths of a meter), the surface area increases exponentially. A small amount of this liquid has more “active surface” than a massive block of solid copper, making it hyper-efficient.
EPA tryouts ionic nano copper technology on polluted Birim River
2. How it Works in Polluted Water
When this liquid is introduced into a “galamsey-polluted” river, a three-step chemical reaction occurs:
A. Adsorption (The Metal Magnet)
The copper ions in the liquid carry a charge that attracts heavy metals (Lead, Arsenic, Cyanide). These toxins “stick” to the copper nanoparticles. Once bound together, they become heavy and fall to the bottom as a stable sediment, or are easily filtered out.
B. Flocculation (Clearing the Mud)
Galamsey water is “turbid” (muddy) because tiny clay particles are suspended in the water. The ionic liquid neutralizes the electrical charges that keep these particles floating. This causes them to clump together, a process called flocculation, turning the “brown soup” into clear water with settled silt at the bottom.
C. Disinfection (Biological Cleanup)
Copper nanoparticles can penetrate the cell walls of harmful bacteria and fungi. Once inside, they disrupt the cell’s metabolism, effectively sterilizing the water without the need for harsh chemicals like chlorine.
3. Why is it “Revolutionary” for Ghana?
Traditional water treatment (using Alum or Chlorine) often fails when the water is too muddy because the chemicals get “lost” in the silt.
This nano-liquid is different because:
1.Speed: It works in minutes compared to the hours required for traditional settling.
2.Precision: It targets specific heavy metals left behind by illegal mining.
3.Low Residuals: Because it is so efficient, very small amounts are needed, reducing the risk of chemical buildup in the environment.
VPO/EB
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