Photostability of the UV filter benzophenone-3 and its effect on the photodegradation of benzotriazole in water

2011 ◽  
Vol 8 (6) ◽  
pp. 581 ◽  
Author(s):  
You-Sheng Liu ◽  
Guang-Guo Ying ◽  
Ali Shareef ◽  
Rai S. Kookana

Environmental contextThe environmental fate of a particular contaminant can be influenced by the presence of other chemicals. It is shown that the photodegradation in water of benzotriazole, a common household and industrial chemical, is reduced in the presence of a sunscreen compound. Thus, contaminants such as benzotriazole may persist longer in the environment in the presence of chemicals designed to filter ultraviolet rays, such as those used in sunscreens. AbstractThe presence of co-solutes (e.g. UV filters) can potentially influence the environmental fate of micropollutants. The photolysis of benzotriazole (BT, an anticorrosion agent) and benzophenone-3 (BP-3, a UV filter), as well as their interactions in aqueous solutions under UV and artificial solar light with or without added humic acid (HA) and metal ions (Cu2+ and Fe3+), has been investigated. BT was found to be photosensitive under UV irradiation, but photostable under solar light. The half-lives for the photolysis of BT were 2.8 h in pure aqueous solution and increasing to 4.5 h in the presence of BP-3 (1.0 mg L–1). BP-3 was photostable under both UV and artificial solar light. Solar radiation exposure of 50 days resulted in a small loss of BP-3 (8 %) in pure aqueous solution, and resulted in a greater loss of BP-3 (up to 31 %) at 50 mg L–1 of HA. UV irradiation of the BT solutions containing BP-3 led to formation of five photoproducts, formed mainly by N–N and N–NH bond scission, polymerisation and hydroxylation. In the case of BP-3, one major photoproduct was isolated and tentatively identified as 2,4-dimethylanisole, formed by the loss of hydroxy and benzoyl groups.

RSC Advances ◽  
2014 ◽  
Vol 4 (87) ◽  
pp. 47000-47004 ◽  
Author(s):  
Yaping Yang ◽  
Xin-Long Ni ◽  
Tao Sun ◽  
Hang Cong ◽  
Gang Wei

A sensitive and selective method for the determination of Hg2+ cations by fluorescence enhancement in pure aqueous solution was developed and obtained by simple organic synthesis.


2016 ◽  
Vol 40 (5) ◽  
pp. 4513-4518 ◽  
Author(s):  
Guang Li ◽  
Farong Tao ◽  
Qian Liu ◽  
Liping Wang ◽  
Zhuang Wei ◽  
...  

A novel reversible colorimetric chemosensor based on polyethylene glycol has been developed to detect Cu2+ ions in pure aqueous solution.


2020 ◽  
Vol 94 (13) ◽  
pp. 2723-2732
Author(s):  
Tapan Kumar Saha ◽  
Subarna Karmaker ◽  
Sanjay Debnath ◽  
Md. Imran Ali Biswas

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 404-410
Author(s):  
Ahed H. Zyoud ◽  
Hala Salah ◽  
Shaher H. Zyoud ◽  
Samer H. Zyoud ◽  
Muath H. Helal ◽  
...  

2016 ◽  
Vol 18 (45) ◽  
pp. 31211-31216 ◽  
Author(s):  
Xiaolong Lu ◽  
Rongguo Wang ◽  
Lifeng Hao ◽  
Fan Yang ◽  
Weicheng Jiao ◽  
...  

˙OH radicals produced under UV irradiation in aqueous solution induce the oxidative etching of MoS2/WS2 nanosheets to QDs.


2017 ◽  
Vol 326 ◽  
pp. 1197-1209 ◽  
Author(s):  
Xiaoxue Pan ◽  
Liqing Yan ◽  
Chenguang Li ◽  
Ruijuan Qu ◽  
Zunyao Wang

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Mingjie Ma ◽  
Guanyu Wang ◽  
Zhengpeng Yang ◽  
Shanxiu Huang ◽  
Weijie Guo ◽  
...  

Solid waste red mud was modified by HCl leaching. The structure property and composition of modified red mud were investigated by X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET). Under UV irradiation, methyl orange (MO) aqueous solution was photodegraded by modified red mud. The obtained results showed that the specific surface area of modified red mud was 317.14 m2/g, which was about 40 times higher than that of the normal red mud. After UV irradiation for 50 min, the removal percentage of MO reached 94.2%. The study provided a novel way for the application of red mud to the photocatalytic degradation of organic wastes.


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