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Employing Chlorella pyrenoidosa in eco-friendly acetylsalicylic acid degradation: Insights from physiology and
Jingjing Shangguan1, Na Yang2, Litao Zhang2
1Key Lab of Breeding Biotechnology and Sustainable Aquaculture (CAS), Institute of Oceanology, Chinese Academy of Sciences, 88 Haijun Road, Qingdao 266404, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, 168 Wenhai Road, Aoshanwei Town, Jimo, Qingdao 266237, China; College of Marine Sciences, University of Chinese Academy of Sciences, Qingdao 266404, China.
Abstract:
Emerging contaminants, often present at low concentrations, are of increasing concern due to their persistence and potential hazards. Chlorella pyrenoidosa has shown significant potential for removing these emerging contaminants from aquatic environments. In this study, C. pyrenoidosa effectively removed and degraded acetylsalicylic acid (ASA) at concentrations ranging from 2.2 to 22.1 mg/L, achieving a removal efficiency of 98.8 %, with 89.0 % of this removal attributed to biodegradation. ASA treatment also significantly promoted cellular growth, enhanced protein and soluble sugar accumulation, and improved both photosynthetic and respiratory activities. At 22.1 mg/L ASA, protein content increased by 51.9 %, and soluble sugar content rose by 34.8 %. Transcriptomic analysis revealed that ASA promoted carbon metabolism and nitrogen metabolism. These results highlight C. pyrenoidosa as a promising, eco-friendly solution for the removal of ASA, offering potential applications in sustainable wastewater treatment and resource recovery.
