Microalgae as a Natural CO2 Sequester: A Study on Effect of Tobacco Smoke on Two Microalgae Biochemical Responses

Frontiers in Energy Research

Abd El-Fatah Abomohra¹  Arman Amani Babadi³  Fatemeh Fazeli Zafar⁴  Bahram Barati⁴  Lili Qian⁴  Shuang Wang⁴  Chen Hao⁴ 

[1] Botany and Microbiology Department, Faculty of Science, Tanta University, Tanta, Egypt;Department of Environmental Engineering, School of Architecture and Civil Engineering, Chengdu University, Chengdu, China;School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Science (TUMS), Tehran, Iran;School of Energy and Power Engineering, Jiangsu University, Jiangsu, China;

关键词: fatty acids;    smoke effect;    growth;    Chlamydomonas;    biodiesel;   

DOI  :  10.3389/fenrg.2022.881758

来源: DOAJ

【 摘 要 】

Microalgae are known as the most efficient biological sequesters of carbon dioxide (CO2). Recently, they have been exploited to enhance air quality by decreasing CO2 levels and increasing oxygen (O2) concentrations. However, in public places, there are sources of toxic chemicals such as tobacco smoke that may affect the growth of microalgae. For the first time, the current study explores the influence of tobacco smoke on the cell growth, biodiesel characteristics, and biochemical composition of two strains of model microalgae. Chlamydomonas strains were treated with tobacco smoke in a sealed box for 7 days, wherein every 1 h, one cigarette was burnt. Upon exposure of microalgae to tobacco smoke, the specific growth rate (μmax) was unaffected in CHL-2220 and remained around 0.500 days−1, whereas in CHL-2221, it decreased notably from 0.445 days−1 to 0.376 days−1. In the CHL-2221, the lipid level considerably reduced from 15.55 %DW to 13.37 %DW upon exposure to tobacco smoke. In both strains, palmitic acid was the main constituent of saturated fatty acids (SFAs) that displayed significant (p < 0.05) decreases in response to tobacco smoke exposure. In CHL-2221, oleic acid (C18:1) presented a substantial increase from 7.64 to 17.09% in response to tobacco smoke. Moreover, exposure of CHL-2220 to tobacco smoke decreased the cetane number (CN) from 30.34 to 25.28, while in CHL-2221, it increased from 26.07 to 29.73 upon treatment. Both strains demonstrated low-quality biodiesel to be used as feedstock. Conversely, their fatty acid profile revealed their promising use as nutrient food.

【 授权许可】

Unknown