Groundwater is an important resource that serves as a backbone of human development. In several
regions, mostly in developing countries, groundwater from sedimentary and hard rock aquifers
used for drinking is naturally contaminated with arsenic. In different countries in Asia such as
India, Bangladesh, Cambodia, China, Nepal, Pakistan, Taiwan, Thailand and Vietnam, the situation
of arsenic toxicity is alarming and severe health problems are reported amongst the inhabitants
relying on groundwater as sources of water for drinking purposes....