Scholarlink

Background <p>Bioinspired synthesis of metal oxide nanoparticles offers and ecofriendly approach for enhancing the biomass growth and carbon fixation. However, the effect of plant mediated hematite iron oxide nanoparticles on local microalgal strains remain insufficiently explored.</p> Objectives <p>This study aimed to synthesis hematite iron oxide α-Fe<sub>2</sub>O<sub>3</sub> nanoparticles (α-FeONPs) using <i>Citrus aurantiifolia</i> extract and evaluated their effects on microalgal growth, light absorption, and carbon fixation efficiency.</p> Methods <p>The synthesized nanoparticles were characterized by X-Ray Diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), and Energy Dispersive X-ray analysis (EDX). The effect of nanoparticles on the growth performance, biomass accumulation, chlorophyll fluorescence parameters, and CO<sub>2</sub> fixation rates of <i>Dictyosphaerium</i> sp. strains (DHMI, DHMII) and <i>Chlorella sorokiniana</i> were evaluated at varying nanoparticles concentrations.</p> Results <p>XRD confirmed nanoparticles crystallinity, FTIR revealed plant derived functional group and SEM-EDX showed spherical morphology with expected elemental composition. <i>Dictyosphaerium</i> DHMII showed the highest biomass productivity (0.35 ± 0.01 g/L/d at 10 d) achieved, followed by DHMI (0.33 ± 0.01 g/L/d at 10 d), and <i>Chlorella sorokiniana</i> (0.29 ± 0.01 g/L/d at 9 d). The maximum total biomass reached 2.79, 2.64, and 2.36 g/L respectively. At 15 mg/L dose of nanoparticles DHMII and DHMI exhibited the highest CO<sub>2</sub> fixation rates 0.65 ± 0.03 and 0.61 ± 0.03 g/L/d. In comparison, <i>C. sorokiniana</i> showed a lower CO fixation rate. The primary photochemical efficiency (Φ_P<sub>0</sub>) increased 33.5% <i>Dictyosphaerium</i> strains.</p> Conclusion <p>The fluorescence results suggest treatment enhances the regulation of excess energy, and oxidative stress, supporting improved microalgal productivity and carbon fixation.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Bio-Inspired α-Fe2O3 Nanoparticles from Citrus aurantiifolia: Impacts on Microalgae Growth and CO2 Sequestration via a Chlorophyll Fluorescence

  • 期刊论文

  • 发表日期：

    2025年12月17日

查看全文
  • Ayesha Aslam,
  • Rabia Liaquat,
  • Mohammed Zwawi,
  • Ali Bahadar

摘要

Background

Bioinspired synthesis of metal oxide nanoparticles offers and ecofriendly approach for enhancing the biomass growth and carbon fixation. However, the effect of plant mediated hematite iron oxide nanoparticles on local microalgal strains remain insufficiently explored.

Objectives

This study aimed to synthesis hematite iron oxide α-Fe2O3 nanoparticles (α-FeONPs) using Citrus aurantiifolia extract and evaluated their effects on microalgal growth, light absorption, and carbon fixation efficiency.

Methods

The synthesized nanoparticles were characterized by X-Ray Diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), and Energy Dispersive X-ray analysis (EDX). The effect of nanoparticles on the growth performance, biomass accumulation, chlorophyll fluorescence parameters, and CO2 fixation rates of Dictyosphaerium sp. strains (DHMI, DHMII) and Chlorella sorokiniana were evaluated at varying nanoparticles concentrations.

Results

XRD confirmed nanoparticles crystallinity, FTIR revealed plant derived functional group and SEM-EDX showed spherical morphology with expected elemental composition. Dictyosphaerium DHMII showed the highest biomass productivity (0.35 ± 0.01 g/L/d at 10 d) achieved, followed by DHMI (0.33 ± 0.01 g/L/d at 10 d), and Chlorella sorokiniana (0.29 ± 0.01 g/L/d at 9 d). The maximum total biomass reached 2.79, 2.64, and 2.36 g/L respectively. At 15 mg/L dose of nanoparticles DHMII and DHMI exhibited the highest CO2 fixation rates 0.65 ± 0.03 and 0.61 ± 0.03 g/L/d. In comparison, C. sorokiniana showed a lower CO fixation rate. The primary photochemical efficiency (Φ_P0) increased 33.5% Dictyosphaerium strains.

Conclusion

The fluorescence results suggest treatment enhances the regulation of excess energy, and oxidative stress, supporting improved microalgal productivity and carbon fixation.

Graphical Abstract