کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5750473 1619698 2017 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short CommunicationUV-induced effects on toxicity of model disinfection byproducts
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Short CommunicationUV-induced effects on toxicity of model disinfection byproducts
چکیده انگلیسی


- Investigation of UV-induced effects on chemistry and toxicology
- Cytotoxicity evaluation of UV-treated samples by in-vitro human cell model
- Photodegradation products could carry similar cytotoxicity as parent compounds.
- Reduction in cytotoxicity along with photodegradation of N-chlorinated organics
- Reduction in cytotoxicity by UV treatment

UV (Ultraviolet)-based treatment has been demonstrated to be effective for removal of some disinfection byproducts (DBPs) and to be beneficial for reduction of genotoxicity and cytotoxicity in chlorinated water. However, to a large extent, UV-induced effects on chemistry and toxicology have been treated as a black box, in the sense that little or no UV dose-dependent behavior has been reported. To address this issue, the effects of UV254 irradiation on 1,4-dibenzoquinone (BQ), 2,6-dichloro-1,4-benzoquinone (DCBQ), and chlorocreatinine (Cl-Cre) as model DBPs were examined, both in terms of photodegradation and cytotoxicity. These compounds have been identified as DBPs that are relevant in swimming pool settings; however, these compounds will be relevant in other water treatment settings, including drinking water production and wastewater reuse. UV254 irradiation was shown to promote photodecay of all three compounds. However, for BQ and DCBQ, the corresponding cytotoxicity of the UV-irradiated samples remained essentially unchanged, even when the compound was completely photodegraded. These results indicate that the photodegradation products of BQ and DCBQ carry similar cytotoxicity as their respective parent compounds. On the other hand, UV254-irradiation of Cl-Cre yielded a decrease in cytotoxicity that correlated with photodechlorination of Cl-Cre. These experiments also demonstrated a reduction in cytotoxicity in connection with photodechlorination of an N-chlorinated organic compound. Overall, the results of these experiments indicate the importance of defining products of UV photodecay processes, both in terms of chemistry and toxicity; these attributes are expected to be important in many UV-based applications, including potable water production, water reuse, and recreational water settings.

Illustration of toxicity reduction by UV irradiation57

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 599–600, 1 December 2017, Pages 94-97
نویسندگان
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