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Efficient synergistic co-removal of Cu(II) and Cr(VI) was accomplished with a novel nitrogen-doped chitosan-Fe(III) composite (NFEC). Coexistent Cu(II) and Cr(VI) elevated mutual adsorptive capacities by 83.05% and 100.27%, and accelerated initial uptake rates by 23.58% and 123.10%, respectively. Moreover, common anions including NO3−, Cl−, SO42−, CO32− and PO43− all promoted Cu(II) adsorption, and...
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