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Effects of sodium selenite on the growth, biochemical composition and selenium biotransformation of the filamentous microalga Tribonema minus
Bioresource Technology ( IF 9.7 ) Pub Date : 2023-06-10 , DOI: 10.1016/j.biortech.2023.129313 Feifei Wang 1 , Yuanhong Li 1 , Rundong Yang 1 , Na Zhang 1 , Shuyi Li 1 , Zhenzhou Zhu 1
Bioresource Technology ( IF 9.7 ) Pub Date : 2023-06-10 , DOI: 10.1016/j.biortech.2023.129313 Feifei Wang 1 , Yuanhong Li 1 , Rundong Yang 1 , Na Zhang 1 , Shuyi Li 1 , Zhenzhou Zhu 1
Affiliation
This study aimed to investigate the physiological and biochemical responses of filamentous microalga Tribonema minus to different Na2 SeO3 concentrations and its selenium absorption and metabolism to evaluate the potential in treating selenium-containing wastewater. The results showed that low Na2 SeO3 concentrations promoted growth by increasing chlorophyll content and antioxidant capacity, whereas high concentrations caused oxidative damage. Although Na2 SeO3 exposure reduced lipid accumulation compared with the control, it significantly increased carbohydrate, soluble sugar, and protein contents, with the highest carbohydrate productivity of 117.97 mg/L/d at 0.5 mg/L Na2 SeO3 . Furthermore, this alga effectively absorbed Na2 SeO3 in the growth medium and converted most of it into volatile selenium and a small part into organic selenium (predominantly as selenocysteine), showing strong selenite removal efficacy. This is the first report on the potential of T. minus to produce valuable biomass while removing selenite, providing new insights into the economic feasibility of bioremediation of selenium-containing wastewater.
中文翻译:
亚硒酸钠对丝状微藻 Tribonema mins 生长、生化组成和硒生物转化的影响
本研究旨在研究丝状微藻 Tribonema minus 对不同 Na2SeO3 浓度的生理生化反应及其硒的吸收和代谢,以评价其处理含硒废水的潜力。结果表明,低浓度 Na2SeO3 通过增加叶绿素含量和抗氧化能力促进生长,而高浓度会导致氧化损伤。虽然与对照相比,Na2SeO3 暴露减少了脂质积累,但它显着增加了碳水化合物、可溶性糖和蛋白质含量,在 0.5 mg/L Na2SeO3 时碳水化合物生产率最高,为 117.97 mg/L/d。此外,这种藻类有效地吸收了生长培养基中的 Na2SeO3,并将其大部分转化为挥发性硒,一小部分转化为有机硒(主要是硒代半氨酸),显示出很强的亚硒酸盐去除功效。这是关于 T. minus 在去除亚硒酸盐的同时产生有价值的生物质的潜力的第一份报告,为含硒废水生物修复的经济可行性提供了新的见解。
更新日期:2023-06-10
中文翻译:
亚硒酸钠对丝状微藻 Tribonema mins 生长、生化组成和硒生物转化的影响
本研究旨在研究丝状微藻 Tribonema minus 对不同 Na2SeO3 浓度的生理生化反应及其硒的吸收和代谢,以评价其处理含硒废水的潜力。结果表明,低浓度 Na2SeO3 通过增加叶绿素含量和抗氧化能力促进生长,而高浓度会导致氧化损伤。虽然与对照相比,Na2SeO3 暴露减少了脂质积累,但它显着增加了碳水化合物、可溶性糖和蛋白质含量,在 0.5 mg/L Na2SeO3 时碳水化合物生产率最高,为 117.97 mg/L/d。此外,这种藻类有效地吸收了生长培养基中的 Na2SeO3,并将其大部分转化为挥发性硒,一小部分转化为有机硒(主要是硒代半氨酸),显示出很强的亚硒酸盐去除功效。这是关于 T. minus 在去除亚硒酸盐的同时产生有价值的生物质的潜力的第一份报告,为含硒废水生物修复的经济可行性提供了新的见解。