Preparation and properties of corn cob cellulose-based water and fertilizer retention materials
Corncob cellulose combined with carboxymethylation was used to prepare a superabsorbent hydrogel,ammonia nitrogen adsorption was introduced to prepare a highly efficient water and fertilizer retention material(CCH/Z).The microstructure,functional group composition and hydrophilicity of the syn-thetic material were analyzed by SEM,FTIR and contact Angle tests.The water and fertilizer retention per-formance of the synthetic material was tested by water swelling experiment and ammonia nitrogen adsorption experiment.The results showed that the water retention rate of CCH/Z could reach 452.49％.In terms of fertilizer retention,the adsorption rate in 100 mg/L ammonia nitrogen solution could reach 41.4％when the amount of CCH/Z was 0.15 g.Both the pseudo-first-order kinetic model and the pseudo-second-order model kinetic model can describe the ammonia nitrogen adsorption behavior of CCH/Z.Thermodynamic analysis showed that the adsorption behavior of CCH/Z was in accordance with the Freundlich model.
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