The Content of Pigments and Photosynthetic Activity of Chlorella vulgaris Beij. (Chlorophyta) When Exposed to Sodium Selenite, Zinc Sulphate, and Chromium Chloride

Боднар, О. І.; Herts, A. I.; Herts, N. V.; Грубінко, В. В.

doi:10.1615/interjalgae.v21.i4.40

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…The Chl a and Chl b , as well as total carotenoids, were calculated according to Wellburn ( 1994 ). The results were expressed as µg ml −1 ; the ratio of Chl a /Chl b and pigment index (ratio of carotenoids/Chl a ) were calculated (Bodnar et al 2016 , 2019 ).…”

Section: Methodsmentioning

confidence: 99%

Potential of the microalgae Chlorella fusca (Trebouxiophyceae, Chlorophyta) for biomass production and urban wastewater phycoremediation

et al. 2022

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The present work focuses on: (1) the evaluation of the potential of Chlorella fusca to grow and synthesize metabolites of biotechnological interest, after being exposed for fourteen days to urban wastewater (UW) from Malaga city (UW concentrations: 25%, 50%, 75%, and 100%); (2) the study of the capacity of C. fusca to bioremediate UW in photobioreactors at laboratory scale; and (3) the evaluation of the effect of UW on the physiological status of C. fusca, as photosynthetic capacity by using in vivo Chl a fluorescence related to photosystem II and the production of photosynthetic pigments. C. fusca cell density increased in treatments with 50% UW concentration, followed by the treatment with 100% UW, 75% UW, the control, and finally 25% UW. Protein content increased to 50.5% in 75% UW concentration. Stress induced to microalgal cultures favored the increase of lipid production, reaching a maximum of 16.7% in 100% UW concentration. The biological oxygen demand (BOD5) analysis indicated a 75% decrease in 100% UW concentration. Dissolved organic carbon (DOC) levels decreased by 41% and 40% in 50% UW and 100% UW concentration, and total nitrogen (TN) decreased by 55% in 50% UW concentration. The physiological status showed the stressful effect caused by the presence of UW on photosynthetic activity, with increasing impact as UW concentration grew. In the framework of circular economy, we seek to deepen this study to use the biomass of C. fusca to obtain metabolites of interest for biofuel production and other biotechnological areas. Graphical Abstract

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Section: Methodsmentioning

confidence: 99%

Potential of the microalgae Chlorella fusca (Trebouxiophyceae, Chlorophyta) for biomass production and urban wastewater phycoremediation

et al. 2022

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“…However, except for the 5 g/L concentration, Na 2 SO 4 continued to inhibit Oocystis lacustris growth, reaching a second peak of inhibition by the 5th day of cultivation. In addition to altering osmotic pressure, Na 2 SO 4 may also compete with structurally similar nutrients for transport proteins, thereby reducing the ability of algal cells to acquire essential other nutrients for growth, such as selenite and molybdate ions [32][33][34]. It was also observed that as the algal cell concentration increased, the standard deviation among replicate samples widened.…”

Section: Influence Of Different Na 2 So 4 Concentrations On the Growt...mentioning

confidence: 99%

Stress Responses and Ammonia Nitrogen Removal Efficiency of Oocystis lacustris in Saline Ammonium-Contaminated Wastewater Treatment

Zhu,

Zhang,

Chen

et al. 2024

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The increasing concern over climate change has spurred significant interest in exploring the potential of microalgae for wastewater treatment. Among the various types of industrial wastewaters, high-salinity NH4+-N wastewater stands out as a common challenge. Investigating microalgae’s resilience to NH4+-N under high-salinity conditions and their efficacy in NH4+-N utilization is crucial for advancing industrial wastewater microalgae treatment technologies. This study evaluated the effectiveness of employing nitrogen-efficient microalgae, specifically Oocystis lacustris, for NH4+-N removal from saline wastewater. The results revealed Oocystis lacustris’s tolerance to a Na2SO4 concentration of 5 g/L. When the Na2SO4 concentration reached 10 g/L, the growth inhibition experienced by Oocystis lacustris began to decrease on the 6th day of cultivation, with significant alleviation observed by the 7th day. Additionally, the toxic mechanism of saline NH4+-N wastewater on Oocystis lacustris was analyzed through various parameters, including chlorophyll-a, soluble protein, oxidative stress indicators, key nitrogen metabolism enzymes, and microscopic observations of algal cells. The results demonstrated that when the Oocystis lacustris was in the stationary growth phase with an initial density of 2 × 107 cells/L, NH4+-N concentrations of 1, 5, and 10 mg/L achieved almost 100% removal of the microalgae on the 1st, 2nd, and 4th days of treatment, respectively. On the other hand, saline NH4+-N wastewater minimally impacted photosynthesis, protein synthesis, and antioxidant systems within algal cells. Additionally, NH4+-N within the cells was assimilated into glutamic acid through glutamate dehydrogenase-mediated pathways besides the conventional pathway involving NH4+-N conversion into glutamine and assimilation amino acids.

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The Content of Pigments and Photosynthetic Activity of Chlorella vulgaris Beij. (Chlorophyta) When Exposed to Sodium Selenite, Zinc Sulphate, and Chromium Chloride

Cited by 2 publications

References 27 publications

Potential of the microalgae Chlorella fusca (Trebouxiophyceae, Chlorophyta) for biomass production and urban wastewater phycoremediation

Potential of the microalgae Chlorella fusca (Trebouxiophyceae, Chlorophyta) for biomass production and urban wastewater phycoremediation

Stress Responses and Ammonia Nitrogen Removal Efficiency of Oocystis lacustris in Saline Ammonium-Contaminated Wastewater Treatment

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