Distribution and assessment of hydrogeochemical processes of F-rich groundwater using PCA model: a c

• 作者: Tao Liu Xubo Gao Xiaobo Zhang Chengcheng Li
• 来源期刊: 地球化学学报(英文）
• 关键词: Fluoride Groundwater chemistry PCA model Hydrogeochemical processes Yuncheng Basin
• 年，卷（期）: 2022,（2）
• 页码范围: 216-225
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s11631-019-00374-6

摘要

Hydrogeochemistry and factor analysis were conducted together to assess the distribution and the major geochemical processes in fluoride-contaminated shallow groundwater in the Yuncheng Basin. Spatially, fluoride concentration was low (<1.5 mg/L) in the southern piedmont plain, medium (< 4 mg/L) in the central basin, and high (up to 14.1 mg/L) in Kaolao lowland areas in shallow aquifers. A three-factor principal component analysis model explained over 75.1% of the total variance. Sediment weathering leaching and evapotranspiration were recognized as the first primary hydrochemical processes response for the groundwater chemistry and explained the largest portion (42.1%) of the total variance. Factor two reflects the negative influence of human activities, with a positive loading of NO3- and HCO3-, and negative loading of well depth. Fluoride-bearing mineral dissolution and alkaline condition was ranked as the third factors responding for groundwater chemistry and explained 11.2% of the total variance.