K2O Consulting recommended and supplied a silica sand media called DMI-65 as a replacement media. DMI-65 was installed in just one of the filters and after an initial start-up period, the DMI-65 was found to remove the arsenic on a consistent basis to less than 10 parts per billion.
Arsenic Removal from Water: Arsenic is extremely poisonous. IARC (International Agency for Research on Cancer, 2004) has classified arsenic as a human carcinogenic substance (group 1). Long-term intake of drinking water with elevated arsenic concentrations can cause the development of arsenicosis, the collective term for diseases caused by chronic exposure to arsenic. It includes several kinds of skin lesions and cancers, like hyper-pigmentation, hyperkeratosis, gangrene, skin cancer, lung cancer and bladder cancer (WHO, 2006).