沸石和糠醛渣对硝酸盐吸附性影响的研究

Study about the impact factors on the nitrate adsorptive capacity of zeolite and furfural residue

利用沸石和糠醛渣改性制得硝酸盐吸附剂,研究吸附剂的饱和吸附能力和各种影响因子(温度、pH值、吸附时间、吸附质浓度、吸附剂用量和干扰离子)对硝酸盐吸附性能的影响。结果表明,改性沸石和糠醛渣的硝酸盐吸附能力大大增强;影响因子对吸附剂吸附硝酸盐能力的影响很大,其中升温有利于解吸、在中性pH值附近脱除率较高、干扰离子可降低吸附剂的硝酸盐脱除率;影响因子对改性糠醛渣MF的吸附影响要比对改性沸石的影响大。因此,改性沸石在实际应用中比改性糠醛渣MF的硝酸盐吸附能力强,具有更好的应用前景。

In this paper,the impact factors of the adsorbents made by modified zeolite and furfural residue on nitrate adsorptive capacity（NAC） were studied,including temperature,pH,adsorption time,nitrate concentration,adsorbent quantity and the interfering ions.The results showed that the adsorbents had high NAC and the impact factors made great impact on NAC： raising temperature would be beneficial to desorption which was high at neutral pH value,and the nitrate removing ratio（NRR） was affected and decreased by the interfering ions.Meantime,the effect of these impact factors on MF was greater than that of modified zeolites.Finally,modified zeolite could be better applied since its adsorptive capacity was better than that of modified MF.