Earth Science Frontiers ›› 2022, Vol. 29 ›› Issue (4): 455-467.DOI: 10.13745/j.esf.sf.2021.10.3

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Sources and influencing factors of arsenic in nearshore zone during river water infiltration

LU Shuai1,2,3(), SU Xiaosi4, FENG Xiaoyu5, SUN Chao6   

  1. 1. School of Water Resources and Environment, Hebei GEO University, Shijiazhuang 050031, China
    2. Hebei Province Key Laboratory of Sustained Utilization and Development of Water Resources, Shijiazhuang 050031, China
    3. Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Shijiazhuang 050031, China
    4. Institute of Water Resources and Environment, Jilin University, Changchun 130021, China
    5. School of Gemology and Material, Hebei GEO University, Shijiazhuang 050031, China
    6. Hebei Key Laboratory of Geological Resources and Environment Monitoring and Protection, Hebei Institute of Environmental Geology Exploration, Shijiazhuang 050021, China
  • Received:2020-07-23 Revised:2021-11-05 Online:2022-07-25 Published:2022-07-28


The Shenyang Huangjia water source area is a typical riverside groundwater source area in northern China. In its nearshore zone the iron (Fe), manganese (Mn) and arsenic (As) contents were well above the safety standard. In order to find out the sources and influencing factors of groundwater As in the affected area, samples of river water, groundwater and soils of the study area were collected and tested. Water quality indexes and carbon and sulfur stable isotopes of water samples, and the contents and occurrences of typical minerals and As in soil samples were analyzed. The results showed that As contents were very low in river water samples but generally exceeded the standard in groundwater samples. In the early stage of river water infiltration, some As-bearing minerals were oxidized by oxidizing river water and As was released. Later on, the groundwater environment became reductive with the infiltration of river water, and reductive dissolution of As-bearing Fe/Mn minerals resulted in the gradual increase of groundwater As. Typical minerals in the study area were pyrite, siderite, pyrolusite, hematite, goethite, rhodochrosite, etc. Through desorption of exchangeable arsenic, oxidation of organic matter-bound arsenic, and reductive dissolution of iron-manganese oxide-bound arsenic, As was release into the groundwater. To a certain extent, As content in the groundwater was negatively correlated with groundwater pH and redox potential (Eh) and positively correlated with the dissolved organic carbon (DOC), HCO 3 -, Fe and Mn contents.

Key words: river water infiltration, nearshore zone, groundwater, arsenic, Shenyang Huangjia water source area

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