Treatment of water using various adsorbents

Abstract

The earth contains only 3% of pure water, in this readily available fresh water content is very low. The rapid population growth creates more demand of fresh water for every day activity. To meet this demand, treatment of raw water as well as recycling of wastewater is necessary. Adsorption is one of the techniques which is used to treat the water in primary as well as tertiary condition according to treatment scheme. Nowadays portable filters available in the market mostly rely on activated carbon-based adsorption process. Conventional activated carbon is expensive , therefore introduction to new materials as naturally available can be more effective .Thereby ,while choosing the adsorbent with following criteria such as cost of the adsorbent , pH, reaction time are need to be given more emphasis . The study reviews on water treatment using various natural adsorbents like muringaolefera, tamarind seeds, and bentonite soil etc . It also discusses the various heavy metal pollutant removal like lead, arsenic and zinc etc using various natural adsorbent.