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首页> 外文期刊>Environmental toxicology and chemistry >Multivariate relationships between groundwater chemistry and toxicity in an urban aquifer.
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Multivariate relationships between groundwater chemistry and toxicity in an urban aquifer.

机译：城市含水层中地下水化学与毒性之间的多变量关系。

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摘要

Multivariate statistical methods were used to investigate the causes of toxicity and controls on groundwater chemistry from 274 boreholes in an urban area (London) of the United Kingdom. The groundwater was alkaline to neutral, and chemistry was dominated by calcium, sodium, and sulfate. Contaminants included fuels, solvents, and organic compounds derived from landfill material. The presence of organic material in the aquifer caused decreases in dissolved oxygen, sulfate and nitrate concentrations, and increases in ferrous iron and ammoniacal nitrogen concentrations. Pearson correlations between toxicity results and the concentration of individual analytes indicated that concentrations of ammoniacal nitrogen, dissolved oxygen, ferrous iron, and hydrocarbons were important where present. However, principal component and regression analysis suggested no significant correlation between toxicity and chemistry over the whole area. Multidimensional scaling was used to investigate differences in sites caused by historical use, landfill gas status, or position within the sample area. Significant differences were observed between sites with different historical land use and those with different gas status. Examination of the principal component matrix revealed that these differences are related to changes in the importance of reduced chemical species.
机译：使用多变量统计方法研究了英国市区（伦敦）274个井眼的地下水化学毒性的原因和控制方法。地下水呈碱性至中性，化学成分以钙，钠和硫酸盐为主。污染物包括燃料，溶剂和源自垃圾填埋场材料的有机化合物。含水层中有机物质的存在导致溶解氧，硫酸盐和硝酸盐浓度的降低，以及亚铁和氨态氮浓度的增加。毒性结果与单个分析物浓度之间的Pearson相关性表明，氨氮，溶解氧，亚铁和碳氢化合物的浓度在存在时很重要。但是，主成分分析和回归分析表明，在整个区域内，毒性与化学反应之间无显着相关性。多维标度用于调查因历史用途，垃圾填埋气状态或样本区域内的位置所引起的站点差异。在具有不同历史土地用途和具有不同瓦斯状况的地点之间观察到了显着差异。对主成分矩阵的检查表明，这些差异与还原化学物种重要性的变化有关。

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