天然沸石去除地下水中氨氮的研究  

Study on Removal of Ammonium-Nitrogen in Groundwater by Natural Zeolites

作　　者：陈坚[1] 黄国鑫[1] 刘菲[1] 秦晓鹏[1] 辛晓华[1] 金爱芳[1] 

机构地区：[1]中国地质大学(北京)水资源与环境工程北京市重点实验室,北京100083

出　　处：《安徽农业科学》2011年第10期6020-6022,6033,共4页Journal of Anhui Agricultural Sciences

基　　金：国家水体污染控制与治理重大专项(2009ZX07424-002;2009-ZX07212-003);国家自然科学基金项目(40972162)

摘　　要：针对地下水中氨氮(NH4-N)污染,采用天然沸石进行了试验研究,探讨了沸石种类、振荡强度、pH、吸附等温线等因素对去除地下水中氨氮的影响。结果表明,天然沸石对NH4-N具有"快速吸附、缓慢平衡"的特点,浙江缙云沸石对地下水中NH4-N具有较好的去除能力。当反应时间≤3 h,高振荡强度(200 r/min)的NH4-N去除率大于低振荡强度(100 r/min)的;振荡强度显著影响NH4-N的去除效果。当pH介于2.59～10.66时,去除率为74.23%～93.71%。中性初始pH(5.76～8.55)利于NH4-N的吸附去除,酸性(pH≤2.59)导致去除率略有下降,而碱性(pH≥10.66)致使去除率急剧下降。缙云沸石的Langmiur吸附等温公式为:Q=0.964 8μ/(1+0.181 0μ),而Freundlich吸附公式为:Q=0.815 8μ0.5762,推荐采用后者。An experiment was carried out by using natural zeolites to deal with the NH4-N contamination in groundwater.The effects of zeolite type,vibration intensity,pH and adsorption isotherm curve on the removal effect of NH4-N were investigated.As indicated by the experimental results,NH4-N adsorption by natural zeolites was characterized by ＂fast adsorption and slow equilibration＂,and the zeolites in Jinyun of Zhejiang Province showed the excellent performance for NH4-N removal.The removal efficiency at high vibration intensity（200 r/min） was greater than that of low intensity（100 r/min） at reaction time ≤3 h,NH4-N removal efficiency was significantly influenced by the vibration intensity.The removal efficiency ranged from 74.23% to 93.71% at the pH of 2.59-10.66.The neutral pH（5.76-8.55） could promote NH4-N adsorption removal;the acidic pH value（pH≤2.59） caused a slight decrease in removal efficiency;however,the alk pH value（pH≥10.66） led to a sharp decrease in the removal efficiency.Langmiur adsorption isotherm curve of Jinyun zeolite was Q=0.964 8 μ/（1＋0.181 0 μ）,and its Freundlich adsorption isotherm curve was Q=0.815 8 μ0.576 2.The latter is recommended.

关 键 词：天然沸石 氨氮 地下水 沸石种类 振荡强度 PH 吸附等温线 

分 类 号：X52[环境科学与工程—环境工程]