人民黄河2016，Vol.38Issue(8)：73-76,4.DOI:10.3969/j.issn.1000-1379.2016.08.019
托克托县潜水氮化物浓度空间分布及其成因
Nitrides Concentrations Spatial Distribution and the Reasons in Unconfined Water in Tuoketuo County
摘要
Abstract
The physical geography and hydrogeological condition in unconfined water of Tuoketuo County,Inner Mongolia were studied to analyze the correlations of pH value,redox potential(Eh),chemical oxygen demand(CODMn ),ammoniacal nitrogen,nitrite nitrogen and nitrate nitrogen concentrations. The analysis finds out that the NH4-N concentration in the groundwater is negatively correlated with Eh,but positively correlated with CODMn . Combined with the feature of regional groundwater flow system feature,the spatial distribution and formation mechanisms of NH3-N,NO2-N and NO3-N in unconfined water are revealed:the oxidation-deoxidation environment of groundwater is affected by the groundwater flow field,the redox potential decreases from recharge area to drainage area. Influenced by oxidation-deoxidation environment,in the groundwater recharge area of the northeast,the content of NO3-N is high and the content of NH3-N is low generally. To the west direction along the Dahei River the NO3-N concentration decreases and the NH3-N increases. The unreasonable discharge of animal manure and wastewater are the major factors that caused nitrogen pollution in the groundwater of sub-area.关键词
地下水/反硝化作用/硝态氮/氨氮/亚硝态氮/托克托县Key words
groundwater/denitrification/nitrate/ammonia/nitrite分类
资源环境引用本文复制引用
史晓珑,董少刚..托克托县潜水氮化物浓度空间分布及其成因[J].人民黄河,2016,38(8):73-76,4.基金项目
国家自然科学基金资助项目（41562020）。 （）
