沸石静态吸附性能试验研究

摘要

利用天然斜发沸石作为吸附剂，进行沸石静态吸附性能进行试验及分析．由试验结果可知，沸石对铵离子具有很强的选择性离子交换和吸附能力．在10 min 时，锥形瓶中氨氮的浓度为1.31 mg/L，沸石对氨氮的去除率为73.8％；在20 min 时，锥形瓶中氨氮的浓度为0.96 mg/L，沸石对氨氮的去除率为80.8％；在30 min 时，锥形瓶中氨氮的浓度为0.65 mg/L，沸石对氨氮的去除率为87％；30 min 以后，沸石对氨氮的去除率增加不大．沸石和含氨氮的溶液发生吸附作用和离子交换作用之后，会造成其出水 pH 升高．沸石对微污染河水的 CODMn 的去除率为2.89％～3.78％，对微污染河水的 UV254的去除率为5.41％～6.82％．%Using natural clinoptilolite as adsorbent,zeolite static adsorption is experimented and ana-lyzed.The test result shows that zeolite has a strong selective ion exchange and adsorption capaci-ty for the ammonium ion.Within 10 min,ammonia nitrogen concentration in the conical flask is 1.31 mg/L,the removal rate of zeolite for ammonia nitrogen is 73.8%;In 20 min,ammonia nitro-gen concentration in the conical flask is 0.96 mg/L,the removal rate is 80.8%;In 30 min,ammo-nia nitrogen concentration in the conical flask is 0.65 mg/L,the removal rate is 87%;After 30 min,the removal rate has not increased greatly.After the adsorption and ion exchange between ze-olite and liquid containing ammonia nitrogen,the water pH will increase.The removal rate of Zeo-lite for CODMn of slightly polluted river is 2.89%~3.78%,and for UV254 of slightly polluted river,the removal rate is 5.41%~6.82%.