人造沸石对服务区污水氨氮的吸附特性试验研究  

Experimental Study on the Adsorption Characteristics of Artificial Zeolite on Ammonia Nitrogen in Service Area Wastewater

作　　者：曾波 任天成 赵红 邓利智 吴永明[2,3] 邓觅[3] ZENG Bo;REN Tiancheng;ZHAO Hong;DENG Lizhi;WU Yongming;DENG Mi(Jiangxi Transportation Research Institute Co.,Ltd.,Nanchang 330200,China;Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,School of Resources&Environment,Nanchang University,Nanchang 330031,China;Institute of Microbiology,Jiangxi Academy of Sciences,Nanchang 330096,China)

机构地区：[1]江西省交通运输科学研究院有限公司,江西南昌330200 [2]南昌大学资源与环境学院鄱阳湖环境与资源利用教育部重点实验室,江西南昌330031 [3]江西省科学院微生物研究所,江西南昌330096

出　　处：《水处理技术》2024年第6期63-68,共6页Technology of Water Treatment

基　　金：江西省重点研发计划项目(20202BBGL73084);江西省交通运输厅重大研发专项(2021Z0003);江西省科技创新基地计划(20212BCD42014);江西省科学院省级科技计划项目(2021YSBG10003,2021YSBG22024,2022YSBG22012)。

摘　　要：从材质、投加量、固体悬浮物等方面考察了人造沸石(1#、2#)、红火山石和天然沸石四种常见吸附材料对高速公路服务区污水中氨氮的去除影响。结果表明:人造沸石(1#、2#)对氨氮去除效果明显优于红火山石和天然沸石;振荡有利于提高氨氮的去除效率,其中80 r/min振荡速度较静置状态提升了23.57%;投加量增大,不仅能提高氨氮去除率,也可以缩短处理时间,其中,4 g/L实验组较2 g/L实验组缩短约17 h达到相似去除效果,而50 g/L实验组则在反应前1 h就可以使氨氮降至27.35 mg/L并趋近24 h时对应浓度23.95 mg/L,去除率达66.53%。污水中固体悬浮物(SS)对沸石降低氨氮效果无明显影响,但沸石具有一定的氨氮去除限度,浓度无法持续降低。进一步的吸附动力学和热力学分析表明,人造沸石1#对氨氮的反应过程更符合准二级动力学,R^(2)>0.93,且理论吸附量q_(e)(cal)更接近实验吸附量q_(e)(exp),而热力学实验证明人造沸石1#吸附氨氮属于吸热反应(△H为3693.92 J/mol),温度升高有利于反应的进行。The effects of artificial zeolite(1#,2#),red volcanic stone and natural zeolite on the removal of ammonia nitrogen from sewage in expressway service area were investigated from the aspects of material,dosage and solid suspended matter.The results showed that the removal effect of artificial zeolite(1#,2#)on ammonia nitrogen was better than that of red volcanic stone and natural zeolite.Oscillation could improve the removal efficiency of ammonia nitrogen,and the oscillation speed of 80 r/min was 23.57% higher than that of static state.The increase of dosage could not only improve the removal rate of ammonia nitrogen,but also shorten the treatment time.Among them,the 4 g/L experimental group can shorten about 17 h compared with the 2 g/L experimental group to achieve similar removal effect.In the 50 g/L experimental group,ammonia nitrogen decreased to 27.35 mg/L at 1 h and approached the corresponding concentration of 23.95 mg/L at 24 h,and the removal rate reached 66.53%.The solid suspended matter(SS)in sewage had no obvious effect on the ammonia nitrogen reduction effect of zeolite,but zeolite had a certain limit of ammonia nitrogen removal,and the concentration could not be reduced continuously.Further adsorption kinetics and thermodynamic analysis showed that the reaction process of artificial zeolite 1#to ammonia nitrogen was more in line with the quasi-second-order kinetics,R^(2)>0.93,and the theoretical adsorption quantity q_(e)(cal)was closer to the experimental adsorption quantity q_(e)(exp).The thermodynamic experiments showed that the adsorption of ammonia nitrogen by artificial zeolite 1#belongs to the endothermic reaction(△H was 3693.92 J/mol),and the reaction was favorable to the increase of temperature.

关 键 词：沸石 高速公路服务区 污水 氨氮 

分 类 号：TQ424[化学工程]