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Morphology of the samples: (a) HRTEM of Norit_2_raw, (b) SEM of Norit_2_raw, (c) SEM/EDX mapping of Norit_2_3T, (d) HRTEM of Norit_2_3T sample, (e) SEM of Norit_2_3T sample and (f) SEM/EDX mapping of Norit_2_ox_3T sample; arrow highlights—evidence of dye adsorption.
