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Iron oxyhydroxides, commonly known as ferrihydrites, are unable to remove dissolved heavy metals at acidic pH, especially below 5.0, due to fierce competition from hydrogen ions. A new hybrid iron-rich inorganic sorbent has been identified and extensively studied in relation to heavy metals removals in fixed-bed processes for influent pH as low as 3.5. Every single particle of this new hybrid sorbent...
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