The Effect of pH on Growth and Carbon Sequestration Efficiency of Chlorella vulgaris

Nursyafica Nadia Johari and Rashidi Othman
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Nursyafica Nadia Johari: Herbarium Lab Unit, Department of Landscape Architecture, Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 53100 Kuala Lumpur, Malaysia
Rashidi Othman: Herbarium Lab Unit, Department of Landscape Architecture, Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia, 53100 Kuala Lumpur, Malaysia

International Journal of Research and Scientific Innovation, 2025, vol. 12, issue 5, 477-480

Abstract: The increasing urgency of climate change has driven the need for innovative carbon mitigation strategies. Microalgae, particularly C.vulgaris, have garnered attention for their potential to capture atmospheric COâ‚‚ while contributing to ecological sustainability. This study investigates the optimization of carbon sequestration potential of C. vulgaris under varying pH levels (3.0 to 11.0) using BBM medium. Growth performance was assessed by measuring optical density (OD750) and biomass accumulation, while carbon sequestration was quantified by calculating COâ‚‚ equivalent fixation over a 14-day culture period. The results reveal that C. vulgaris exhibited maximum carbon fixation at pH 9, demonstrating its adaptability to optimized environmental conditions. These findings emphasize the potential of C. vulgaris as an efficient, scalable, and eco-friendly carbon sink, positioning it as a viable candidate for integration into urban green infrastructure and climate mitigation strategies. This research provides valuable insights for policy frameworks aiming to incorporate biological solutions into the fight against climate change.

Date: 2025
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