Toxicological effects of phenol on four marine microalgae

Duan, Weiyan; Meng, Fanping; Lin, Yufei; Wang, Guoshan

doi:10.1016/j.etap.2017.04.006

Cited by 90 publications

(33 citation statements)

References 34 publications

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“…The total concentration of phenolic compounds in POME can reach up to 303 mg L −1 as demonstrated before (Neoh et al 2013), yet unfortunately these compounds were not measured during our experiments. Marine microalgae such as Dunaliella salina and P. tricornutum were described to be more sensitive to phenolic compounds from digested POME than freshwater algae such as Chlorella vulgaris (Nur et al 2016;Duan et al 2017). Overall, a 30% POME fraction was found to be most suitable to be used as growth medium for P. tricornutum for all subsequent experiments in this study.…”

Section: Discussionmentioning

confidence: 80%

Sulfated exopolysaccharide production and nutrient removal by the marine diatom Phaeodactylum tricornutum growing on palm oil mill effluent

et al. 2019

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Palm oil mill effluent (POME) is the major source of environmental hazard in palm oil industry. Yet, due to its high nutrient content, POME may offer opportunities for the growth of algae as a source of value-added compounds such as sulfated extracellular polysaccharide (sEPS) while simultaneously removing valuable nutrients such as phosphate. The aim of this paper was to evaluate growth, total sEPS production, and nutrient removal by the diatom Phaeodactylum tricornutum grown on POME under a range of experimental conditions (temperature, salinity, supplementation of extra nutrients). Phaeodactylum tricornutum was found to grow well on a range of POME concentrations, with 30% POME as optimum concentration. Nitrate and urea addition enhanced both growth rate and final biomass, whereas phosphate significantly stimulated growth only at low temperature. Box-Behnken response surface methodology revealed that interactions between temperature and salinity, and between temperature and urea influenced sEPS production. The highest total sEPS (140 mg L −1) concentration was recorded at 25°C, 2.6% salinity, and 100 mg L −1 urea addition. Our study shows that POME wastewater, supplemented with urea at relatively high temperatures, can be considered as a potential medium for P. tricornutum to replace commercial nutrients while producing high amounts of sEPS and removing almost 90% of phosphorous from the wastewater.

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Section: Discussionmentioning

confidence: 80%

Sulfated exopolysaccharide production and nutrient removal by the marine diatom Phaeodactylum tricornutum growing on palm oil mill effluent

et al. 2019

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“…High ammonia concentrations in the wastewater are considered inhibitory for P. tricornutum (Ayre et al 2017). Furthermore, the presence of potentially toxic phenolic compounds in digested POME could also lower the growth rate of P. tricornutum (Limkhuansuwan and Chaiprasert 2010;Duan et al 2017). Overall, a 30% POME fraction was found to be the most suitable medium to optimize fucoxanthin productivity in P. tricornutum.…”

Section: Discussionmentioning

confidence: 99%

Environmental and nutrient conditions influence fucoxanthin productivity of the marine diatom Phaeodactylum tricornutum grown on palm oil mill effluent

et al. 2018

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Palm oil mill effluent (POME) is a type of wastewater posing large problems when discharged in the environment. Yet, due to its high nutrient content, POME may offer opportunities for algal growth and subsequent harvesting of high-value products. The marine diatom Phaeodactylum tricornutum is a potential feedstock diatom for bioactive compounds such as the carotenoid fucoxanthin, which has been shown to have pharmaceutical applications. The aim of this paper was to evaluate the growth and fucoxanthin productivity of P. tricornutum grown on POME, as a function of light intensity, temperature, salinity, and nutrient enrichment. High-saturating irradiance (300 μmol photons m −2 s −1) levels at 25°C showed highest growth rates but decreased the fucoxanthin productivity of P. tricornutum. Box-Behnken response surface methodology revealed that the optimum fucoxanthin productivity was influenced by temperature, salinity, and the addition of urea. Nutrient enrichment by phosphorus did not enhance cell density and fucoxanthin productivity, while urea addition was found to stimulate both. We conclude that POME wastewater, supplemented with urea, can be considered as the potential medium for P. tricornutum to replace commercial nutrients while producing high amounts of fucoxanthin.

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“…To elucidate the effects of phenol concentration on germling growth of S. horneri (Run1), phenol was added to the appropriately enriched culture medium at specific concentrations of 0, 20, 40, 80, and 160 mg L −1 . These dosing levels followed a two-fold geometric progression (Duan et al, 2017). The maximum phenol concentration was the concentration at which growth of brown macroalgae was substantially suppressed in previous studies (Eklund, 1998;Myers et al, 2006).…”

Section: Preparation Of Test Solutionsmentioning

confidence: 88%

Toxicological study for phenol using germling growth of the brown macroalga Sargassum horneri

et al. 2018

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Marine macroalgae are important for maintaining ecosystems in coastal areas. However, to our knowledge, only a few studies of marine macroalgae have developed protocols for assessing the toxic effects of growth inhibitors typically found in industrial wastewaters. Sargassum horneri, a large brown macroalga commonly found in seaweed beds in coastal Japan, can be easily collected, and its fertilized eggs can be preserved for approximately 170 days. Therefore, the present study evaluated the possibility of developing a seaweed bioassay using the germling growth of S. horneri to obtain toxicological data for phenol. The addition of phenol to culture media clearly inhibited the germling growth of S. horneri. The 14-day EC 50 value on the basis of the specific growth rate was 58 mg phenol L −1 , while the 21-day EC 50 value on the basis of the thallus area was 36 mg phenol L −1. Furthermore, the no-observed-effect concentration was estimated to be 20 mg phenol L −1. Renewal of culture medium did not significantly affect germling growth of S. horneri during our 21 days of culturing. S. horneri appeared to be as sensitive to phenol as other marine macroalgae reported in the previous studies. Therefore, we consider that S. horneri is one of the appropriate candidates of macroalgae for toxicity testing.

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Toxicological effects of phenol on four marine microalgae

Cited by 90 publications

References 34 publications

Sulfated exopolysaccharide production and nutrient removal by the marine diatom Phaeodactylum tricornutum growing on palm oil mill effluent

Sulfated exopolysaccharide production and nutrient removal by the marine diatom Phaeodactylum tricornutum growing on palm oil mill effluent

Environmental and nutrient conditions influence fucoxanthin productivity of the marine diatom Phaeodactylum tricornutum grown on palm oil mill effluent

Toxicological study for phenol using germling growth of the brown macroalga Sargassum horneri

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