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The paper investigated the optimal conditions for lead removal from synthetic aqueous solutions using hydrated lime as a precipitant. The results of measuring the lead concentration in the solution after treatment, obtained using flame atomic absorption spectrometry, showed that from an aqueous solution with an initial pH of 10 and an initial Pb2⁺ concentration of 100 mg/L, it is possible to achieve 99.827% lead removal by precipitation using a hydrated lime dose of 100 mg, at a mixing speed of 300 rpm and a mixing time of 5 min. It was also found that mixing speed has a more significant effect on precipitation efficiency than time, and that the presence of PO₄3⁻ in water increases lead precipitation.

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Efficiency of Hydrated Lime in Removal of Lead Ions from Aqueous Solutions

  • 会议论文

  • 发表日期：

    2025年

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  • Halid Junuzović,
  • Sabina Begić,
  • Edisa Papraćanin,
  • Amra Selimović

摘要

The paper investigated the optimal conditions for lead removal from synthetic aqueous solutions using hydrated lime as a precipitant. The results of measuring the lead concentration in the solution after treatment, obtained using flame atomic absorption spectrometry, showed that from an aqueous solution with an initial pH of 10 and an initial Pb2⁺ concentration of 100 mg/L, it is possible to achieve 99.827% lead removal by precipitation using a hydrated lime dose of 100 mg, at a mixing speed of 300 rpm and a mixing time of 5 min. It was also found that mixing speed has a more significant effect on precipitation efficiency than time, and that the presence of PO₄3⁻ in water increases lead precipitation.