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Adipic acid dihydrazide (ADH) was used to cross-link carboxymethyl chitosan (CMCS) microspheres for Cu2+ removal from aqueous solution. SEM, FTIR, XPS and BET techniques were performed to characterize the ADH cross-linked CMCS (ADH-CMCS) microspheres. The effects on adsorption capacities of pH value, adsorption time, and initial Cu2+ concentration were investigated. The adsorption experiments demonstrated...
The present work aimed to develop two kinds of novel adsorbents, carboxylated chitosan magnetic microspheres (EDCMM) and submicrospheres (EDCMSM), for comparative study of Pb2+ removal. Several techniques, including SEM, TEM, FTIR, BET and VSM, were applied to characterize the adsorbents. Batches of tests were conducted to investigate the Pb2+ adsorption at different pH values, contact time, initial...
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