Photodegradation of aniline in aqueous suspensions of microalgae

Wang, Lei; Zhang, Changbo; Wu, Feng; Deng, Nansheng

doi:10.1016/j.jphotobiol.2006.12.006

Cited by 59 publications

(35 citation statements)

References 33 publications

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“…Although slight decrements in photocatalytic activity were observed, the algae-TiO2/Ag NF still maintained a high level of activity in successive cycles. A similar phenomenon was found in photo-transformation of aniline and benzo[a]pyrene by algae cells, and the photolysis of pollutants were still efficient in the presence of dead algae cells [26,40]. This finding confirmed that algae-TiO2/Ag NF was stable and effective for the reduction of Cr(VI) and could be easily recovered based on its good settling properties.…”

Section: Repeated Testssupporting

confidence: 77%

Algae decorated TiO2/Ag hybrid nanofiber membrane with enhanced photocatalytic activity for Cr(VI) removal under visible light

Wang

Zhang

Gao

et al. 2017

Chemical Engineering Journal

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116

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Algae as an abundant natural biomass, more attention has been paid to explore its potential application in environmental pollutants treatment. This work prepared the algae-TiO2/Ag bionano hybrid material by loading algae cells on the ultrafine TiO2/Ag chitosan hybrid nanofiber mat. For the first time, the synergistic photocatalytic effect of fresh algae and TiO2/Ag nanomaterial was investigated by removal of Cr(VI). The addition of algae significantly improved the photo-removal of Cr(VI) in the system with TiO2/Ag hybrid nanomaterial under visible light irradiation.Meanwhile, the photocatalytic mechanism was studied. The photogenerated reactive oxygen species were quantified and the addition of algae apparently decreased the

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Section: Repeated Testssupporting

confidence: 77%

Algae decorated TiO2/Ag hybrid nanofiber membrane with enhanced photocatalytic activity for Cr(VI) removal under visible light

Wang

Zhang

Gao

et al. 2017

Chemical Engineering Journal

Self Cite

116

View full text Add to dashboard Cite

show abstract

“…By the way, the algal degradation of aniline under irradiation at >350 nm was faster in the presence of dead cells than live ones for four species. 81) Aniline was most slowly degraded in the presence of the live diatom Nitzschica hantzschiana, having a hard cell wall, and its degradation with the live cyanobacterium Anabaena cylindrica was greatly suppressed under an N 2 atmosphere. Under irradiation, aniline was insignificantly taken up by any algal species, while the carboxylic acids and pigments, such as chlorophylls, characterized by absorption and IR spectra, were released from these algae.…”

Section: Contribution Of Phototrophic Microorganismsmentioning

confidence: 99%

Pesticide behavior in modified water-sediment systems

Katagi

2016

J. Pestic. Sci.

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The standardized laboratory water-sediment study in darkness is utilized as primary information on pesticide behavior to assess its ecotoxicological impacts in the edge-of-field water bodies. The half-lives of pesticide in water and sediment are key parameters to predict its environmental concentration, and its metabolic profiles help to avoid overlooking unexpected toxicological impacts from metabolites. However, no consideration of environmental factors such as sunlight and aquatic macrophytes is included, and this may lead to a conservative assessment. We review the experimental factors in the existing standardized design and then the effects of illumination and aquatic macrophytes introduced to the water-sediment system. The effects of temperature and the water-sediment ratio should be investigated in more detail and the pesticide behavior is possibly modified by illumination via photodegradation and/or metabolism in phototrophic microorganisms. Aquatic macrophytes play a major role as an additional sorption site and in further pesticide metabolism.

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“…For antibiotics, the strong impact of the drugs on microorganisms usually leads to a low treatment efficiency. 16 There are also good applications of the algae to treat antibiotics like tetracycline 17 and noroxacin. Chemical treatments, especially the advanced oxidation processes (AOPs), are inuential treatment methods for the organic contaminants that are non-easily eliminated by biological treatments.…”

Section: Introductionmentioning

confidence: 99%

Understanding the algal contribution in combined UV-algae treatment to remove antibiotic cefradine

Zhang

Guo

et al. 2015

RSC Adv.

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The aim of this study is to investigate the algal contribution in a combined UV-algae treatment to remove the commonly used antibiotic cefradine. We evaluated the removal capacity of the individual alga (Chlorella pyrenoidosa), UV activated and combined UV-algae treatments. The toxic effect of the effluents treated by the above process on the standard test organism rotifer (Brachionus calyciflorus) was also investigated. Our results showed that the individual algae treatment was inefficient at removing the antibiotic. Although the UV treatment decreased the antibiotic concentration efficiently (26.93% residue), it also increased the toxicity of the effluent (1.04 times of the parent compound). However, the relatively high removal efficiency (22.01% residue) and the reduced toxicity of the effluent (nearly half of that by the individual UV treatment) were obtained synchronously after the UV-algae combined treatment. The contribution of the algae was also confirmed by investigating the corresponding properties of the combined UV-activated sludge treatment and the combined UV-activated sludge-algae treatment. Our present study supported our hypothesis that (1) the performance of the individual algae treatment was inferior to the individual UV irradiation; (2) the algae treatment was necessary in a UV-algae combined treatment system to control the toxicity of the effluent after the UV treatment process.

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Photodegradation of aniline in aqueous suspensions of microalgae

Cited by 59 publications

References 33 publications

Algae decorated TiO2/Ag hybrid nanofiber membrane with enhanced photocatalytic activity for Cr(VI) removal under visible light

Algae decorated TiO2/Ag hybrid nanofiber membrane with enhanced photocatalytic activity for Cr(VI) removal under visible light

Pesticide behavior in modified water-sediment systems

Understanding the algal contribution in combined UV-algae treatment to remove antibiotic cefradine

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