Tuesday, November 23, 2010
For centuries, people mainly buy gold bullion to preserve their wealth and purchasing power. But these days, precious metals like gold and silver are not only useful in the preservation of wealth. It can also be utilized to improve the lives of local communities. Four years ago, T. Pradeep and A. Sreekumaran Nair from the Indian Institute of Technology detected and filtered toxins like malathion, endosulfan and chlorpyrifos pesticides from water using gold and silver nanoparticles. These scientists have patented the technology though they could waive the royalty for filters to be designed for villages where contamination of pesticides and insecticides contaminating drinking water is prevalent.