Filtering Contaminated Rivers Using Nanotechnology

Area of sustainability: Water


Water contamination is a great issue in many industrialized cities. This is especially clear in many Asian countries where the rivers are polluted from their numerous electronic recycling factories.


  • Perry Alagappan from Texas has designed a filter that will be able to filter 99% of heavy metals from water using graphene nanotubes. After use, the filter can be rinsed with a vinegar mix and the residue will be pure metal that can be used to produce products like cell phones etc.
  • Utilizing this technology in contaminated rivers and lakes in less developed countries could be very beneficial. It would help make the water cleaner, improving the overall health of the population.
  • Furthermore, this will provide a more sustainable way to produce new metal products. This could in turn make products like cell phones more affordable for the population.


  • Government
  • Manufacturing companies
  • Chemical engineers
  • Cell phone manufacturers
  • Wastewater workers
  • Maintenance workers


  1. Provide proper education and detailed information about the product
  2. Convince the government to invest in the product
  3. Create efficient residue subtracting procedures


Main article:

Photo source:

UNI: ms5584

My comment on another article,

“This is an interesting idea in theory. It does raise a couple of questions about the implementation and practicalities, though. How will it harvest and store the energy, and how long will the charge last? Will they be able to make the paint 100% explosion safe? Because whenever hydrogen and oxygen directly interact there will be an explosion unless proper precautions are taken. I could not see anything about these issues in the article.
However, if these things are sorted and made fool-proof, this could be an amazing opportunity for houses to start creating their own fuel source. In turn, this paint could even be used on ships sailing long distances to make the journey more energy efficient, as ships are known to be a massively polluting.”



2 thoughts on “Filtering Contaminated Rivers Using Nanotechnology

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