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Abstract
Cross-linked carboxymethyl starch CMS was synthesized with cross-linked starch as raw material, sodium chloroacetate as etherification agent and sodium hydroxide as catalyst, and the structure of the product was characterized by FTIR, SEM and XRD. The optimum synthesis conditions of CMS were m (CSt): m (MCA) = 5:3, NaOH dosage 12 ml, reaction temperature 55 °C and reaction time 3 h. When the concentration of copper ion in the simulated water sample was 25 mg/L and the dosage of CMS was 2 g/L, the removal rate of copper ion was 96.0%, and the adsorption capacity of CMS was 15.4 mg/g.
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Details
1 Institute of Energy Sources, Hebei Academy of Sciences, Shijiazhuang Hebei 050081, China; Hebei Engineering Research Center Water Saving in Industry, Shijiazhuang Hebei 050081, China
2 Institute of Energy Sources, Hebei Academy of Sciences, Shijiazhuang Hebei 050081, China
3 Hebei Sun-water Water Treatment Co., Ltd, Shijiazhuang Hebei 050081, China