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The curve of adsorption capacities of the related samples for Hg2+ versus mass ratio of AEMA to sulfur (a), SEM images of SCOA2 before mercury adsorption (b) and after mercury adsorption (c), and the corresponding EDS mapping of C (d), S (e), N (f), Hg (g) (C0 = 358.49 mg L−1, sample dosage = 30 mg/10 mL, temperature = 30 °C, pH = 6.5, adsorption time = 10 h).
