UV and solar TiO(2) photocatalysis of brevetoxins (PbTxs).

Toxicon : Official Journal of the International Society on Toxinology
Urooj KhanKevin E O'Shea

Abstract

Karenia brevis, the harmful alga associated with red tide, produces brevetoxins (PbTxs). Exposure to these toxins can have a negative impact on marine wildlife and serious human health consequences. The elimination of PbTxs is critical to protect the marine environment and human health. TiO(2) photocatalysis under 350 nm and solar irradiation leads to significant degradation of PbTxs via first order kinetics. ELISA results demonstrate TiO(2) photocatalysis leads to a significant decrease in the bioactivity of PbTxs as a function of treatment time. Experiments conducted in the presence of synthetic seawater, humic material and a hydroxyl scavenger showed decreased degradation. PbTxs are highly hydrophobic and partition to organic microlayer on the ocean surface. Acetonitrile was employed to probe the influence of an organic media on the TiO(2) photocatalysis of PbTxs. Our results indicate TiO(2) photocatalysis may be applicable for the degradation of PbTxs.

References

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Aug 10, 2004·Environmental Science & Technology·Stephen P MezykDaniel J Weidman
May 4, 2005·Environmental Health Perspectives·Lora E FlemingDaniel G Baden
Jul 21, 2006·The Journal of Physical Chemistry. B·A V EmelineN Serpone
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Jun 1, 2006·Oceanography : the Official Magazine of the Oceanography Society·William M Abraham, Daniel G Baden

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Citations

Aug 31, 2012·Radiology and Oncology·Matej SkocajSasa Novak
Sep 3, 2013·Journal of Hazardous Materials·Soo-Wohn LeeV Rodríguez-González
Apr 28, 2011·Applied Microbiology and Biotechnology·Howard A FosterAlex Steele
Dec 20, 2011·Journal of Hazardous Materials·Peter K J RobertsonDetlef W Bahnemann
Jul 22, 2020·Environmental Science and Pollution Research International·Yifei HuangKaige Wang
Apr 28, 2012·Nanoscale Research Letters·Malgorzata WojtoniszakEwa Mijowska
Jan 21, 2022·Environmental Science & Technology·Karen SemZechen Yu

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