@Naizam Thank you for this very enlightening article, particularly regarding the role of riverbed sediments. Is it the iron oxides that also contain the arsenic in association with the iron? You mention that sewage or organics in the water reduce the iron to utilise the chemically bound oxygen. What is the mechanism for the associated As? What is the fate of the reduced iron in the sediments? Thanks

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@Naizam Thank you for this very enlightening article, particularly regarding the role of riverbed sediments. Is it the iron oxides that also contain the arsenic in association with the iron? You mention that sewage or organics in the water reduce the iron to utilise the chemically bound oxygen. What is the mechanism for the associated As? What is the fate of the reduced iron in the sediments? Thanks