3. Purification by Running Water

Water Purification by Photocatalysis on Semiconductors

This paper describes the basics of photocatalysis on semiconductors, mainly on TiO2 and the application of photocatalytic processes to water purification from organic matter. The second chapter is devoted to metal cocatalysts introduced in order to improve the photocatalytic action of titania. Finally, a short review of more interesting practical applications of the processes is presented.

Water purification by sulfide-containing activated carbon.

We investigated a new kind of activated carbon named gaiasafe-Formstoff as an agent for powerful heavy metal reduction. This activated carbon contains highly dispersed sulfide compounds. Our investigations with lead containing wastewaters showed an outstanding metal sulfide precipitation power of the new agent. The lead reduction rates are independent of wastewater parameters like lead concentr...

Nanotechnology for Water Purification

Water Purification in Thailand

Water is a necessary part of life, but without proper filtration, it could cause problems such as illness or death. While citizens of developed countries may take the water that flows from their taps for granted, many parts of the world do not have access to clean water. A small village in Thailand called Nong Bua is one such community that is hindered by the quality of their water supply. Nong...

Enhancing Purification of Surface Water by Potassium Permanganate Addition

The aim of the present research is studying the effect of potassium permanganate addition on the pre-oxidation and coagulation of the surface water. River Nile and El Rayah El Tawfeky of Benha city, Egypt were the surface water supply used in this research. The results showed that El Rayah El Tawfeky raw water had higher turbidity concentration and humic acids absorbance (8.5 NTU and 0.024, res...