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Chitosan Schiff Base Adsorbent
Chromium exists in various oxidation states, among which the toxicity of Cr(VI) is nearly 100 times greater than that of Cr(I)
Traditional methods for removing dissolved heavy metal ions include chemical precipitation, redox, filtration, ion exchange, electrochemical treatment, membrane technology, and evaporation recovery
Chitosan can undergo condensation reaction with aromatic aldehydes under neutral or acidic conditions to produce chitosan Schiff base (CSB)
Preparation of Chitosan Schiff Base: Weigh a certain amount (about 0.
N, O-carboxyethyl chitosan adsorbent
There have been a large number of reports on the carboxymethylation of chitosan and its adsorption of metal ions, but there are few reports on the carboxyethylation of chitosan.
The chitosan is added 1g certain concentration of sodium hydroxide in ethanol, with stirring at room temperature, 3-chloropropionic acid was dissolved in 10ml of ethanol was added dropwise within 30min the reaction flask, heated to the set temperature and the reaction time after 30min, After the reaction, the pH value is adjusted to 7, filtered, washed repeatedly with ethanol, and dried to obtain the target product
Related Links: Lanthanum-loaded Chitosan Adsorbent