摘要
氮在地下水中的主要存在形式是氨氮、硝氮和亚硝氮 ,这三种污染物在石家庄市辖区内 ,由于影响污染敏感性的其它因素大小不同 ,造成三者相互关系有较大区别。浅层地下水易污染区 ,NH3浓度相对较低 ,NO-3浓度相对较高 ,使得 NO-3/ NH3比值较大 ,相反在浅层地下水难污染区 ,水中 NH3浓度相对较高 ,而硝氮浓度表现相对含量较低的特征 ,其 NO-3/ NH3比值较小。易污染区亚硝氮的含量在 0 .0 0 0 1～ 0 .0 2 mg/ L 范围内 ,而在难污染区未能检出 (<0 .0 0 0 1)。利用这一结果可以定量的评价石家庄市区的污染敏感性。
The situation of nitrogen pollution becomes worse and worse in China nowadays. There are three forms in which the nitrogen element exists in the shallow ground water: NO 3-、NO 2- and NH 3. The relationship among these three pollutions is relatively compound because the factors that have great influences on the sensitivity of groundwater pollution in Shijiazhuang City are varied. The NH 3 concentration is low in the area of intense sensitivity of groundwater pollution, which makes the ratio of NO 3-/NH 3 high and the NO 2- concentration in the range from 0.0001 to 0.02mg/L.However, the NH 3 concentration is relatively high in the area of facile sensitivity of groundwater pollution, which makes the ratio of NO- 3/NH 3 low and the NO- 2 concentration barely measured(lower than 0.0001mg/l).This result shows that we can evaluate the sensitivity of groundwater pollution in Shijiazhuang City area in a quantitative way.
出处
《安全与环境工程》
CAS
2004年第4期32-35,共4页
Safety and Environmental Engineering
基金
国家自然科学基金项目 (4 0 2 72 10 3)
关键词
石家庄
浅层地下水
污染敏感性
NO3^-/NH3
shallow groundwater
sensitivity of groundwater pollution
concentration of nitrogen
