A modified environmentally benign modified chitin adsorbent was prepared to use crab shells as raw material,and the factors affecting the adsorption of the adsorbent on the bacteriostatic disinfectant benzalkonium chloride were investigated.And a modified chitin-encapsulated benzalkonium chloride gel was prepared.The bacteriostatic effect of the gel on Staphylococcus aureus,Escherichia coli and spoilage bacteria was examined.The results illustrated that a grand number of loose pore structures existed on the surface of the prepared modified chitin adsorbent,which had a strong adsorption capacity.The modified chitin adsorbent can be used as an adsorbent for BACs of various sources,acidity and alkalinity,and has an exceedingly fast and efficient adsorption of BACs in solutions with BACs concentrations ranging from 2.5 mg/L～80 mg/L.The ICH-BAC hydrogel prepared by adsorption of BACs showed exceedingly good in vitro bacteriostatic activity against Staphylococcus aureus,Escherichia coli and spoilage bacteria.
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