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Hydrogeochemistry Evidence for Impacts of Chemical Acidic Wastewater on Karst Aquifer in Dawu Water Source Area, Northern China

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  • Henghua Zhu

    (School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
    Shandong Institute of Geological Survey, Jinan 250000, China)

  • Jianwei Zhou

    (School of Environmental Studies, China University of Geosciences, Wuhan 430074, China)

  • Zhizheng Liu

    (Shandong Institute of Geological Survey, Jinan 250000, China)

  • Lizhi Yang

    (Shandong Institute of Geological Survey, Jinan 250000, China)

  • Yunde Liu

    (School of Environmental Studies, China University of Geosciences, Wuhan 430074, China)

Abstract

The study of the hydrochemical characteristics and the water–rock interaction of karst groundwater is very important for the rational exploitation of karst groundwater and its pollution control. In this paper, the systematic clustering method was used to analyze the hydrochemical characteristics of different types of groundwater, combined with hydrochemical graphic analysis and correlation analysis to explore the impact of chemical acidic wastewater on the evolution of karst aquifer in the Dawu water source area, northern China. The results show that the chemical acid wastewater, sourcing from discharges/spillages from the local chemical industries, has different degrees of pollution impact on karst groundwater, causing the total hardness of all karst groundwater and the total dissolved solids, Cl − and SO 4 2− in nearly half of the karst groundwater to exceed the quality indexes of class III water in China’s standard for groundwater quality (GB/T 14848-2017). Hydrochloric acid and sulfuric acid in the wastewater can be buffered by the dissolution of carbonate rocks, resulting in a nearly neutral pH (pH-buffering effect) and an increase in Ca 2+ , Mg 2+ , Sr, Cl − and SO 4 2− concentrations in karst groundwater.

Suggested Citation

  • Henghua Zhu & Jianwei Zhou & Zhizheng Liu & Lizhi Yang & Yunde Liu, 2021. "Hydrogeochemistry Evidence for Impacts of Chemical Acidic Wastewater on Karst Aquifer in Dawu Water Source Area, Northern China," IJERPH, MDPI, vol. 18(16), pages 1-10, August.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:16:p:8478-:d:612333
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    References listed on IDEAS

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    1. Matko Patekar & Ivona Baniček & Josip Rubinić & Jasmina Lukač Reberski & Ivana Boljat & Ana Selak & Marina Filipović & Josip Terzić, 2021. "Assessing Climate Change and Land-Use Impacts on Drinking Water Resources in Karstic Catchments (Southern Croatia)," Sustainability, MDPI, vol. 13(9), pages 1-20, May.
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