Rapid Adsorption of Chlortetracycline by Hyper-Linked Porous Polymer Containing Nitrogen
In recent years,the environmental pollution problem become increasingly serious,due to the widespread use of chlortetracycline.To investigate adsorption behavior of the polymers for chlortetracycline,nitrogen-containing hypercross-linked polymers(HCPs-N)were synthesised by one-step Friedel-Crafts reaction using benzotriazole as the functional monomer and 1,4-biphenylbenzyl chloride as crosslinking agents.The polymers were characterised by scanning electron microscopy,automatic microporous physicochemical adsorption instrument,and elemental analysis.The results showed the HCPs-N possesses the porous structure which is randomly linked by a lot of spherical particles,with the specific surface area of 865 m2/g.The adsorption rate of HCPs-N on chlortetracycline was fast,and the adsorption equilibrium was achieved 30 minutes,which conformed to the pseudo-second-order rate equation.The chlortetracycline adsorption capacity of HCPs-N reached 280 mg·g-1,when the initial concentration of chlortetracycline was 500ppm,and the pH of solution was 4.0.The adsorption amount of chlortetracycline on HCPs-N still reached 260 mg·g-1 after five cycles.It exhibits good adsorption and regeneration performance,and has a broad application prospect in pollutant treatment.
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