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By collecting groundwater samples, And Piper trilinear diagram, Gibbs diagram, ion-terminal element diagram, ion ratio and PMF model were comprehensively applied to study the chemical characteristics of groundwater and the main ion sources in a construction waste landfill in Xi’an. The results show that the pH of shallow groundwater in this study area spanned from 7.37 to 8.98, the TDS ranged from 172 to 1590 mg-L-1, and the groundwater was neutral to weakly alkaline fresh water. This cations were dominated by Ca2+ and the anions by HCO3− and SO42−, and the water chemistry types showed partitioning, with Ca-HCO3 type dominating, followed by Ca-SO4 type. Construction waste landfill, agricultural activities and water rock action are the major factors affecting the shallow groundwater chemistry in the study area, contributing 41.8%, 33.7% and 24.5%, respectively.

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Hydrochemical Characteristics and Causes of Shallow Groundwater in Construction Waste Landfills

  • 会议论文

  • 发表日期：

    2025年

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  • Jie Liu,
  • Haiming Li,
  • Ye Li,
  • Yizhang Zhang,
  • Haojie Lu

摘要

By collecting groundwater samples, And Piper trilinear diagram, Gibbs diagram, ion-terminal element diagram, ion ratio and PMF model were comprehensively applied to study the chemical characteristics of groundwater and the main ion sources in a construction waste landfill in Xi’an. The results show that the pH of shallow groundwater in this study area spanned from 7.37 to 8.98, the TDS ranged from 172 to 1590 mg-L-1, and the groundwater was neutral to weakly alkaline fresh water. This cations were dominated by Ca2+ and the anions by HCO3− and SO42−, and the water chemistry types showed partitioning, with Ca-HCO3 type dominating, followed by Ca-SO4 type. Construction waste landfill, agricultural activities and water rock action are the major factors affecting the shallow groundwater chemistry in the study area, contributing 41.8%, 33.7% and 24.5%, respectively.