Preparation of Chitosan/Shell Powder and Its Adsorption Properties for Methylene Blue
Chitosan/shell powder composite material was prepared with Zhoushan Mussel shell as raw material by the method of chitosan liquid deposition and fixation, and it was applied to the adsorption experiment of methylene blue printing and dyeing wastewater. The effects of the amount of chitosan, the amount of adsorbent, the calcination temperature of shell powder and the adsorption time on the adsorption effect were investigated, and the adsorption kinetics was fitted. The experimental results showed that, under normal temperature, 10％ chitosan/shell powder prepared with shell powder at calcination temperature of 1000 ℃ was added with 0.15 g adsorbent for 10 h to treat 100 mg·L-1 methylene blue solution, the removal rate of methylene blue and unit adsorption capacity of adsorbent were 89.22％ and 44.6 mg·g-1. The adsorption process of chitosan/shell powder was more consistent with the quasi-second-order kinetic model.
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