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为了解珠江三角洲地区地下水中铁的含量及其成因,采集并分析了352组地下水样和12组地表水样。分析结果表明:珠江三角洲地区地下水铁含量为未检出～94.8mg/L,平均含量为1.46mg/L。该地区地下水铁含量的分布与其工业化程度及所处区域的补、径、排条件密切相关,尤其在平原区,地下水铁含量与部分地表河流的污染程度更是密切相关,随着远离污染的地表河流,地下水铁含量有明显减少的趋势。不同地区对其地下水铁含量起主导作用的因素也不相同,氧化还原条件是影响珠江三角洲地区地下水铁含量分布的主要因素之一,而酸碱条件和地面污染则只在局部地区对地下水铁含量的分布起主导作用。另外,含水层介质组分、径流条件、上覆土层性质等因素对珠江三角洲地区地下水铁含量也都起到了一定的作用。
In order to understand the iron content in the groundwater in the Pearl River Delta and its causes, 352 groundwater samples and 12 surface water samples were collected and analyzed. The results showed that the groundwater iron content in the Pearl River Delta was undetectable ~ 94.8 mg / L with an average content of 1.46 mg / L. The distribution of groundwater iron content in this area is closely related to its degree of industrialization and the conditions of recharge, drainage and drainage in the area where it is located. Especially in the plains, the iron content of groundwater is more closely related to the pollution of some surface rivers. River, groundwater iron content has significantly reduced the trend. The factors that dominate the groundwater iron content in different areas are also different. The redox conditions are one of the main factors affecting the groundwater iron distribution in the Pearl River Delta. However, the acid-alkali conditions and ground-based pollution only affect the groundwater iron content The distribution plays a leading role. In addition, the aquifer medium composition, runoff conditions, overlying soil properties and other factors on the Pearl River Delta groundwater iron content also played a role.