为探索解决污水处理厂氨氮出水标准不断提高而带来的处理技术难题，配制了氨氮浓度为10 mg/L的模拟废水，考察了利用天然沸石作为吸附剂对其进行处理的效果，研究了影响处理效果的主要因素，并探讨了去除机理。结果表明，天然沸石对低浓度氨氮具有显著的去除效果；pH、吸附时间、吸附剂投加量、沸石粒径对氨氮的去除率均有影响。在pH 7.0、沸石投加量为12 g/L、粒径为0.6~0.9 mm、吸附时间为60 min的条件下，沸石对氨氮的去除率达到80.38%，剩余氨氮小于2.0 mg/L，出水可达到GB 3838-2002地表水Ⅴ类标准。该工艺在污水处理厂提质中具有重要的应用价值。

China's requirements for ammoniacal nitrogen content in effluent from sewage treatment plants are becoming more and more strict, which causes treatment technical difficulties in sewage treatment plants.To solve the difficulties, a simulated wastewater with an ammoniacal nitrogen concentration of 10 mg·L^-1 (close to China's GB 18918-2002 Class A standard) is prepared.The effect of treating the simulated wastewater with natural zeolite as adsorbent is explored, the main factors affecting the treatment effect are studied, and the removal mechanism is discussed.Results show that natural zeolite has a significant removal effect on low concentration ammoniacal nitrogen.Adsorbent dosage, pH, adsorption time, and particle size of zeolite all affect the removal rate of ammoniacal nitrogen.The removal rate of ammoniacal nitrogen by zeolite can reach 80.38% and the remaining ammoniacal nitrogen is less than 2.0 mg·L^-1 under the conditions that pH=7.0, zeolite dosage is 12 g·L^-1, particle size of zeolite is in the range of 0.6-0.9 mm, and adsorption lasts for 60 min.After treatment, the effluent can meet China's GB 3838-2002 surface water class V standard.This process has an important application value in upgrading for sewage treatment plants.

闫智杰(1995-),男,硕士生,研究方向为环境水化学及污染防治,406274864@qq.com