Arsenic contamination of waters is a global problem; therefore, new types of sorbents are needed. A way forward lies in developing new low-cost natural material based sorbents. Peat, peat modified with iron compounds, iron humates and polymeric cation exchangers modified with iron were prepared and tested for sorption of arsenic compounds. The highest sorption capacity was observed using peat sorbents modified with iron compounds. Sorption of different arsenic speciation forms onto iron modified peat sorbents was investigated as a function of pH, reaction time and temperature. Sorption capacity increases with temperature, and was spontaneous and endothermic.
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