UV photolysis for relieved inhibition of sulfadiazine (SD) to biomass growth

Pan, Shihui; Yan, Ning; Zhang, Yongming; Rittmann, Bruce E.

doi:10.1007/s00449-014-1335-x

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…We used 0.1 mol/L sodium hydroxide (NaOH) as solvent to maintain pH 10 to fully dissolve SAs. Then, we added 0.1 mol/L hydrochloric acid (HCl) to adjust the initial pH 7 of the test medium 54 .…”

Section: Methodsmentioning

confidence: 99%

Sulfonamides-induced oxidative stress in freshwater microalga Chlorella vulgaris: Evaluation of growth, photosynthesis, antioxidants, ultrastructure, and nucleic acids

Chen

Wang

Feng

et al. 2020

Sci Rep

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Sulfadiazine (SD), sulfamerazine (SM1), and sulfamethazine (SM2) are widely used and disorderly discharged into surface water, causing contamination of lakes and rivers. However, microalgae are regard as a potential resource to alleviate and degrade antibiotic pollution. the physiological changes of Chlorella vulgaris in the presence of three sulfonamides (SAs) with varying numbers of-cH 3 groups and its SA-removal efficiency were investigated following a 7-day exposure experiment. Our results showed that the growth inhibitory effect of SD (7.9-22.6%), SM1 (7.2-45.9%), and SM2 (10.3-44%) resulted in increased proteins and decreased soluble sugars. oxidative stress caused an increase in superoxide dismutase and glutathione reductase levels but decreased catalase level. the antioxidant responses were insufficient to cope-up with reactive oxygen species (hydrogen peroxide and superoxide anion) levels and prevent oxidative damage (malondialdehyde level). the ultrastructure and DnA of SAtreated algal cells were affected, as evident from the considerable changes in the cell wall, chloroplast, and mitochondrion, and DnA migration. C. vulgaris-mediated was able to remove up to 29% of SD, 16% of SM1, and 15% of SM2. Our results suggest that certain concentrations of specific antibiotics may induce algal growth, and algal-mediated biodegradation process can accelerate the removal of antibiotic contamination. The increase in the use of antibiotics in human and veterinary medicine has raised concerns about their environmental accumulation 1. The accumulation of sulfonamides (SAs), the antibacterial agents that inhibit dihydrofolic acid synthesis, is of particular interest 2. Although the recorded environmental levels of SAs are usually within the microgram per litre range, this concentration may increase bacterial resistance and magnify toxicity via bioaccumulation in food chains 3. Considering the non-degradability of SAs, modern sewage treatment plants may be insufficient to completely remove these agents 4 , resulting in their continuous presence in aquatic environment 5. Thus, there is an urgent need to develop effective methods for SA-removal. Freshwater algae form the most abundant biomass source in aquatic environments and are known to survive under extremely hostile environments 6,7. Several studies have reported the ability of algae to effectively remove persistent organic pollutants such as pesticides 8 , phenols 9,10 , and estrogen 11,12 , and algae can uptake organic pollutants as carbon sources for their growth 7. Thus, algae are considered as a potential resource to alleviate and

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Section: Methodsmentioning

confidence: 99%