Study of acidic air pollutant (SO2 and NO2) tolerance of microalgae with sodium bicarbonate as growth stimulant

IF 2.1 4区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Saurabh Srivastava, P. J. Omar, Shiwanshu Shekhar, Sneha Gupta
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Abstract

The major environmental toxicity of acidic pollutant in the fossil fuel gas substances has long been well known. Macro and microalgae are biological sources with large range of biotechnological uses, for e.g., bioremediation, bio-fuel, air pollutant absorber, and many more. This study addressing the use of Chlamydomonas sp. an effective biomaterial in their tolerance against 2 and 5% of the SO2 & NO2. Improve their growth kinetics by the addition of sodium bicarbonate to the culture conical media. SO2 and NO2 were provided to culture media by the use of Sodium meta-bisulfite and Nitrous acid. The control combination of SO2 and NO2 is providing: 2% SO2, 5% SO2, 2% NO2, 5% NO2, (2% SO2 + 2% NO2), (5% SO2 + 5% NO2) at the seventh day of incubation. The optimum pH ranges in between 7.1 and 8.6 when the exposure of the gas. Results suggested that the growth kinetics of Chlamydomonas sp. is greater in SO2 and some low in the 5% exposure of NO2. The maximum absorbing concentration of SO2 and NO2 was 921.625 μg/ml and 906.25 μg/ml respectively for Chlamydomonas sp. This work highlighting the potential of algae in tolerance to NO2 & SO2 from the polluted air.
碳酸氢钠促生长微藻对酸性空气污染物(SO2和NO2)的耐受性研究
化石燃料气体物质中酸性污染物的主要环境毒性早已为人所知。巨藻和微藻是具有广泛生物技术用途的生物资源,例如,生物修复、生物燃料、空气污染物吸收剂等等。本研究探讨了衣藻对2%和5% SO2和NO2的耐受性的有效生物材料。通过在锥形培养基中添加碳酸氢钠来改善它们的生长动力学。利用亚亚硫酸氢钠和亚硝酸向培养基中提供SO2和NO2。在培养第7天,SO2和NO2的对照组合为:2% SO2、5% SO2、2% NO2、5% NO2、(2% SO2 + 2% NO2)、(5% SO2 + 5% NO2)。当气体暴露时,最佳pH值范围在7.1至8.6之间。结果表明,衣藻在SO2条件下生长动力学较大,在5% NO2条件下生长动力学较低。衣藻对SO2和NO2的最大吸收浓度分别为921.625 μg/ml和906.25 μg/ml,说明了藻类对污染空气中NO2和SO2的耐受潜力。
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来源期刊
CiteScore
4.10
自引率
21.10%
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0
审稿时长
20 weeks
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