Phototransformation of tetrabromobisphenol A in saline water under simulated sunlight irradiation

Xue, Feng; Wei, Jinsheng; Hu, Xuefeng; Liu, Baiyu; Yang, Chen; Yang, Junhan

doi:10.1016/j.chemosphere.2021.132697

Cited by 8 publications

(2 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the absence of external photosensitizers, both direct photolysis and self-sensitized photolysis contribute to the photodegradation of GRNX. The contribution of direct photolysis was determined by using TMP to scavenge the triplet excited states of GRNX and 1 O 2 in the photochemical systems. , Figure b shows that direct photolysis and self-sensitized photolysis had comparable contributions to the photodegradation of GRNX in cationic and zwitterionic forms, while direct photolysis dominated the photodegradation of anionic GRNX species. These results indicate that the ionization state of GRNX has a profound impact on the rate of its phototransformation in the aquatic environment.…”

Section: Resultsmentioning

confidence: 99%

Solar Photodegradation of a Novel des-F(6)-Fluoroquinolone, Garenoxacin, and Ecotoxicity of Its Phototransformation Products

Huang,

Zhang,

Lin

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

Garenoxacin (GRNX) is a novel des-F(6)-fluoroquinolone on the horizon; thus, its fate and risk in the aquatic environment deserve attention. This study systematically investigated, for the first time, the phototransformation of GRNX under simulated and natural sunlight and assessed the ecotoxicity of its photodegradation products. Phototransformation of GRNX was observed to depend strongly on its ionization state, with direct photolysis and self-sensitized photolysis having comparable contributions for the cationic and zwitterionic species, while the latter dominated for the anionic species. Singlet oxygen generated via the self-sensitized photolysis of GRNX was the major reactive oxygen species in its photodegradation. Phototransformation of GRNX in different ionization states followed distinct pathways, with defluorination of the difluoromethyl group occurring only for the zwitterionic and anionic species. GRNX photodegradation in natural water could be described by a simple kinetic model based on the measured steady-state concentrations of 1 O 2 and •OH. Toxicity tests with Vibrio fischeri and Chlorella vulgaris consistently indicate that the generation of hydroxylation and decarboxylation products during photodegradation of GRNX increased the acute toxicity. These findings not only provide insights into the fate of GRNX in sunlit surface water but also reveal the potentially significant risk of its photodegradation products to the aquatic ecosystem.

show abstract

Section: Resultsmentioning

confidence: 99%

Solar Photodegradation of a Novel des-F(6)-Fluoroquinolone, Garenoxacin, and Ecotoxicity of Its Phototransformation Products

Huang,

Zhang,

Lin

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Among these endocrine disruptors, one can cite Bisphenol A, phthalates, cadmium, plomb and tetrabromobisphenol A (TBBPA) which was the target in this study. Known as a flame retardant and widely used in several fields, this molecule finds its usefulness in textile products, plastics and also in electronics [4,5]. As a resistant pollutant, TBBPA is the most used flame retardant, it is insoluble in water which could be the main reason for its accumulation in the body and thereby interfering with the functioning of the endocrine system and inducing harmful effects on the body [6,7].…”

Section: Introductionmentioning

confidence: 99%

Exploring of the sorption mechanism of endocrine disruptors on a newly developed cost-effective microporous material derived from puck (Afroxtyrax lepidophyllus) shell

Kouahou,

Djioko,

Atemkeng

et al. 2023

Preprint

View full text Add to dashboard Cite

Tetrabromobisphenol A (TBBPA), due to its recognized dangerous effects such as interfering in the hormonal system, requires special attention for scientists. This work opens with the aim of depolluting TBBPA in the environment by adsorption in batch mode using activated carbon prepared from puck shell. Absorbent prepared from the puck shells (CRP) bio-based material have been characterized by advanced techniques such as iodine number, EDX mapping, FT-IR, FE-SEM, XRD, N2 adsorption/desorption. Analysis show a high carbon rate in the activated carbons obtained with a surface essentially made up of acid functions. In addition, the Activated carbon derived from puck shell (CRP) exhibited an amorphous phase consisting of mesopores and micropores. The specific surface area obtained from the BET was 502 m²/g. Optimum conditions of TBBPA adsorption obtained from response surface methodology using Box-Behnken model were 200 mg for activated carbon, 15mg/L for TBBPA concentration at pH 7.6, a stirring time of 89 minutes, with a retention percentage of 87.9%. The mechanism explained from the adsorption isotherms and kinetics showed a multilayer and favorable adsorption involving π-π interactions, possibility of ion exchange, Van der Waals and hydrogen bonds. Computational modeling was carried out through functional density theory and Monte Carlo molecular modeling to elucidate the underlying mechanism. These confirmed the experimental results indicating a strong affinity between CRP and TBBPA in a slightly basic medium with adsorption energy of -135.25 Kcal/mol. The results of desorption process using sodium hydroxide, water and ethanol as desorbing agents obtained show that the CRP are indeed reusable.

show abstract

Exploring the Sorption Mechanism of Endocrine Disruptors on a Newly Developed Cost-Effective Microporous Material Derived from Puck (Afroxtyrax lepidophyllus) Shell: Experimental and Theoretical Approaches

Kouahou,

Atemkeng,

Djioko

et al. 2024

Water Air Soil Pollut

View full text Add to dashboard Cite

Phototransformation of tetrabromobisphenol A in saline water under simulated sunlight irradiation

Cited by 8 publications

References 71 publications

Solar Photodegradation of a Novel des-F(6)-Fluoroquinolone, Garenoxacin, and Ecotoxicity of Its Phototransformation Products

Solar Photodegradation of a Novel des-F(6)-Fluoroquinolone, Garenoxacin, and Ecotoxicity of Its Phototransformation Products

Exploring of the sorption mechanism of endocrine disruptors on a newly developed cost-effective microporous material derived from puck (Afroxtyrax lepidophyllus) shell

Exploring the Sorption Mechanism of Endocrine Disruptors on a Newly Developed Cost-Effective Microporous Material Derived from Puck (Afroxtyrax lepidophyllus) Shell: Experimental and Theoretical Approaches

Contact Info

Product

Resources

About