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<p>Phytoremediation and phycoremediation are eco-friendly approaches for treating heavy metal contaminated wastewater. This study, using living <i>Arthrospira platensis,</i> demonstrated noteworthy removal of Pb (72.7 ± 0.9% to 95.1 ± 0.3%) from single and bimetal solution at low initial concentration (5 and 10&#xa0;mg/L), while Cr uptake was comparatively lower (25 ± 0.8% to 35.6 ± 1.4%) over a 7-days duration and was significantly dependent on the experimental duration. Pb uptake by microalgae ranged from 1.21 to 3.11&#xa0;mg/g of wet biomass, whereas Cr uptake was lower (0.57 to 1.18&#xa0;mg/g of wet biomass), indicating that living <i>A. platensis</i> can be a worthy means for treating Pb-contaminated wastewater. However, in comparison, phytoremediation using <i>Eichhornia crassipes</i> and Floating Treatment Wetland (FTW) showed high removal efficiency within the first 7&#xa0;days. The ANOVA test revealed significant differences of microalgal removal efficiency with other treatment methods. Thus, the results suggest the use of <i>E. crassipes</i> and FTW over living <i>A. platensis</i> for treating Pb and Cr contaminated water under conditions of limited nutrients and unfavored pH.</p>

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Mesocosm Assessment of Remedial Efficiency of Heavy Metals from Wastewater by Microalgae, Macrophyte and Floating Treatment Wetland: A Comparative Study

  • 期刊论文

  • 发表日期：

    2026年4月25日

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  • Hosney Jahan Sraboni,
  • Sirajul Hoque,
  • Mohammad Moniruzzaman,
  • Badhan Saha,
  • Priyanka Dey Suchi

摘要

Phytoremediation and phycoremediation are eco-friendly approaches for treating heavy metal contaminated wastewater. This study, using living Arthrospira platensis, demonstrated noteworthy removal of Pb (72.7 ± 0.9% to 95.1 ± 0.3%) from single and bimetal solution at low initial concentration (5 and 10 mg/L), while Cr uptake was comparatively lower (25 ± 0.8% to 35.6 ± 1.4%) over a 7-days duration and was significantly dependent on the experimental duration. Pb uptake by microalgae ranged from 1.21 to 3.11 mg/g of wet biomass, whereas Cr uptake was lower (0.57 to 1.18 mg/g of wet biomass), indicating that living A. platensis can be a worthy means for treating Pb-contaminated wastewater. However, in comparison, phytoremediation using Eichhornia crassipes and Floating Treatment Wetland (FTW) showed high removal efficiency within the first 7 days. The ANOVA test revealed significant differences of microalgal removal efficiency with other treatment methods. Thus, the results suggest the use of E. crassipes and FTW over living A. platensis for treating Pb and Cr contaminated water under conditions of limited nutrients and unfavored pH.