The problem of Arsenic contamination is widespread and it is necessary to remove the arsenic from drinking water.In India arsenic problem was identified as far as 1983 by Dr. K.C. Saha, professor of Dermatology at the school of tropical medicine, Kolkata. The urban people in this area are aware of the problem but tragedy is that in the interior of the country the facts are still largely unknown to those who are most affected.  In some rural areas women suffering from arsenic poisoning are either divorced or disliked by their families.

Health Hazards:

Arsenic mostly affects grown up people. In the affected areas people are suffering from skin disease like hyper pigmentation, keratoses and melanomas that disfigure the skin much like in leprosy. The skin lesion is the last step and then it turns into skin cancer and leads to death within short period.Long-term exposure to arsenic via drinking water causes cancer of skin, lungs, urinary bladder and kidney as well as other skin changes

Permissible Limit:

The WHO guideline for arsenic in drinking water is 0.05 ppm max.  As per latest report of EPA the desirable level of arsenic is less than 0.01ppm for drinking water.

Product Description:

Arsenic Removal System consists of cylindrical vessel with two media in series.

 1.       Iron removal unit consist of Indion ISR media (Iron Specific Resin).

2.       Arsenic Selective Media.

Water is pumped at slight pressure using hand pump, Water is then passed through upper Iron removal media (Indion-ISR) which oxidizes dissolved iron into precipitate form and filters it to give iron below  0.3ppm at the outlet. The media  also oxidizes  arsenic III to  V which can be  easily adsorbed  by arsenic removal media. The filtered water is then passed through Arsenic Selective media for complete removal of arsenic.Media is replaced after exhaustion and expected to produce 180 m3 output.

Treated  water from the unit  has arsenic concentration within acceptable limits as per IS 10500.

Flow Diagram:

Advantages:

Removal of both As(III) and As(V)

Treats arsenic level from 25 ppb to 3000 ppb and iron up to 15 ppm

Reduced contact time

Operational over wide pH (6-8) and temperature up to 40.0o C

Highly selective for As, even with competing ions like sulfate, silica, Ca, etc

Consistently produce water with permissible levels of arsenic