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| 郑州市中心城区高铁锰地下水成因与分布规律 |
| Causes and Distribution of Groundwater with High Concentration of Iron and Manganese in Downtown Zhengzhou |
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| DOI： |
| 中文关键词: 铁 锰 分布特征 成因分析 地下水 郑州市中心城区 |
| 英文关键词: Iron Manganese Distribution characteristics Cause analysis Groundwater Downtown Zhengzhou |
| 基金项目:国家自然科学基金资助项目（41902259）；中央水污染防治基金资助项目（H2020410199S1-0001）；河南省地质研究院院管财政基金资助项目（2023-909-XM019-KT01） |
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| 中文摘要: |
| 于2020年在郑州市中心城区布设273个监测点采集浅层地下水样品，分析地下水中铁和锰的空间分布特征。结果表明，研究区浅层地下水出现高铁锰现象的原因为区内第四纪中更新统和上更新统沉积物中铁锰质结核及浸染经淋溶进入地下水；浅层地下水中铁和锰含量具有伴生关系，铁锰超标区域相对集中，高铁锰区主要分布在黄河南岸局部地区；该区域浅层地下水为还原环境，有利于铁和锰的富集，pH值大多在71～80范围内，呈弱碱性，沿地下水径流方向，铁和锰含量随硝酸盐含量增加而降低，随硫酸盐和氯化物含量增加而增加。 |
| 英文摘要: |
| 273 monitoring sites were set up in downtown Zhengzhou in 2020 to collect shallow groundwater samples and analyze the spatial distribution characteristics of iron and manganese in groundwater The results indicated that high concentration of iron and manganese in shallow groundwater was due to the leaching of iron and manganese nodules in Quaternary Middle Pleistocene and Upper Pleistocene sediments into groundwater of the study area Iron and manganese were associated in shallow groundwater The regions where the concentration of iron and manganese exceeded the standard limits were relatively concentrated High concentration of iron and manganese mainly distributed in local areas on the south bank of the Yellow River， where shallow groundwater was in a favorable reductive environment for the enrichment of iron and manganese， and pH value mostly ranged from 71 to 80， showing weak alkalinity Along the direction of groundwater runoff， the concentration of iron and manganese decreased 〖GK!86mm〗with the increase of nitrate concentration， and increased with the increase of sulfate and chloride concentrations. |
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