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当前位置: 首页 > 文章 > 天然沸石去除地下水中氨氮的研究 安徽农业科学 2011,39 (10) 362-364+375
Position: Home > Articles > Study on Removal of Ammonium-Nitrogen in Groundwater by Natural Zeolites Journal of Anhui Agricultural Sciences 2011,39 (10) 362-364+375

天然沸石去除地下水中氨氮的研究

作  者：
陈坚;黄国鑫;刘菲;秦晓鹏;辛晓华;金爱芳
单  位：
中国地质大学(北京)水资源与环境工程北京市重点实验室
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
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。
译  名：
Study on Removal of Ammonium-Nitrogen in Groundwater by Natural Zeolites
作  者：
CHEN Jian et al(Beijing Key Laboratory of Water Resources & Environmental Engineering,China University of Geosciences(Beijing),Beijing 100083)
关键词：
Natural zeolites;Ammonium-nitrogen(NH4-N);Groundwater;Zeolite type;Vibration intensity;pH;Adsorption isotherm curve
摘  要：
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.

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