Reduction of low arsenic concentrations in drinking water to below 1 mu g L-1 by adsorption onto granular iron (hydr)oxides

Arsenic in drinking water should be reduced as much as possible, because it is amongst carcinogenic substances. FerroSorp (R) Plus, Huijbergen and Spannenburg GIH could reduce As(V) levels in Ouddorp water below the desired 1 mu g L-1. Particularly Huijbergen GIH had according to non-linear Freundlich modeling the higher K-F value, translating into a potentially higher effective adsorption capacity. One of the characteristics that probably determines the success of a GIH is its physical properties. Since the effective adsorption capacity increases with higher initial As(V) concentrations, Huijbergen GIH is a promising adsorbent to reduce a wide range of arsenic concentrations from drinking water. Therefore, this affordable technology is not only reducing ultra-low arsenic concentrations to even lower concentrations in Ouddorp water but is also promising for developing countries that are seriously affected by high concentrations of arsenic in their drinking water.