引用本文:王剑波1,吴伟宏2,阮彬彬2.华东某市老城区潜层地下水硝酸盐分布特征[J].环境监控与预警,2015,7(2):42-45
WANG Jian bo1,WU Wei hong2,RUAN Bin bin2.Nitrate Distribution Characteristics of Shallow Groundwater in an Old City of East China[J].Environmental Monitoring and Forewarning,2015,7(2):42-45
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华东某市老城区潜层地下水硝酸盐分布特征
王剑波1,吴伟宏2,阮彬彬21,2
1.安徽农业大学资源与环境学院,安徽 合肥 230036;2.厦门高新人才有限公司,福建 厦门 361000
摘要:
为了解华东某市老城区潜层地下水硝酸盐分布特征,对老城区地下水现场采样,运用统计学软件spss中的Pearson相关系数和sufer软件Kriging插值方法分析数据,研究了无机氮与地球化学因素间的相关性,同时绘制了pH值、总硬度、硝酸盐、亚硝酸盐的空间分布图。结果表明,硝酸盐是该地区地下水中无机氮的主要存在形态,其所占总氮含量为45.5%~74.8%,封口井的硝酸盐的含量明显低于敞口井的含量,其硝酸盐所占比例最低达到2.2%,且敞口井均受到污染;从相关性的角度来看,氮的转化受到Fe影响较弱。同时氮的形态与pH值、矿化度(TDS)、电导率(EC)等地球化学因素相关水平显著;从分布特征来看,地下水环境中硝酸盐和亚硝酸盐含量东北部高于西南部;不同形态氮的相互转化影响地下水pH值和总硬度,致使pH值的高值区为西南部,而总硬度高值区为东北部。
关键词:  地下水  硝酸盐  亚硝酸盐  相关性分析  分布特征  华东某市老城区
DOI:
分类号:X523;X824
基金项目:
Nitrate Distribution Characteristics of Shallow Groundwater in an Old City of East China
WANG Jian bo1,WU Wei hong2,RUAN Bin bin21,2
1.College of Resources and Environment, Anhui Agriculture University, HeiFei, Anhui 230036, China;2.Xiamen High tech Talents Development Co.Ltd.,Xiamen, Fujiang 361000,China
Abstract:
In order to understand the nitrate distribution characteristics of shallow groundwater in an old city of east China,the spatial variation analysis for nitrate(NO-3)and nitrite (NO-2) content of groundwater samples was studied. The Pearson correlation coefficient and Kriging which were both statistical analysis methods were used to investigated the correlation between inorganic nitrogen and geochemical factors. The spatial distribution maps of pH value, total hardness, nitrate and nitrite were charted simultaneously. The results indicated that nitrate nitrogen of this area was the main form of inorganic nitrogen in groundwater, and the content of NO-3 ranged from 45.5% to 74.8%. The content of NO-3 in sealing wells was obviously lower than in opening wells, which was as low as 2.2%. The opening wells were all polluted. According to the correlation, the effect of iron ions on nitrogen transformation was relatively insignificant. The other influence factors, including pH value, total dissolved solids (TDS) and electrical conductivity (EC), provided strong correlation with inorganic nitrogen in the groundwater. From distribution characteristics, the concentrations of nitrate nitrogen and nitrite nitrogen in the northeast area were higher than in the southwest area, which was increased gradually. The nitrogen transformation between different forms affected the pH value and total hardness of groundwater. The high values of pH and total hardness appeared in the southwest area and the northeast area, respectively.
Key words:  Groundwater  Nitrate  Nitrite  Correlation analysis  Distribution  Old city of east China