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May 7, 2026Environmental Earth SciencesOpen Access

Responses of typical metal ions in groundwater to changes in redox conditions under long-term recharge of reclaimed water: a case study of Chaobai River in Beijing

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Authors

HGHongyi GongMWMengmeng WuBLBinghua Li

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Overview

Randomized trial reveals the impact of reclaimed water recharge on groundwater metal ion concentrations, indicating environmental implications.

Key Points

  • This research investigates how reclaimed water recharge affects the concentrations of metal ions in groundwater under varying redox conditions.
  • Monitoring data collected from 2007 to 2019 in the Chaobai River area.
  • Analyzed metal ion responses (Fe, Mn, Ba) in a phreatic aquifer during and post-recharge of reclaimed water.
  • Assessed the formation of reductive zones and effects on groundwater quality through sulfate reduction.
  • After two years, groundwater within 150 m of the riverbank was replaced by reclaimed water.
  • In reductive zones, Mn and Ba concentrations were significantly higher than reclaimed water levels between 2008-2010, but decreased after 2010.
  • Fe levels approached reclaimed water concentrations due to reductive dissolution and precipitation effects.

Cite This Study

Gong et al. (2026) studied this question.

synapsesocial.com/papers/69fc2b608b49bacb8b34779chttps://doi.org/10.1007/s12665-026-12945-x
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