Volume 14, Number 6 (3-2016)                   TB 2016, 14(6): 227-235 | Back to browse issues page

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Ghaneian M, Salmani M, Ehrampoush M, Dehghani A, NafisI M. Application of the Photocatalytic Process of Ag-ZnO / UV-C for the Degradation of 2,4-Dichlorophenoxyacetic acid In Aqueous Aolutions. TB. 2016; 14 (6) :227-235
URL: http://tbj.ssu.ac.ir/article-1-2021-en.html

MSc Shahid Sadoughi University of Medical Science, yazd, Iran , mreza.nafisi@yahoo.com
Abstract:   (893 Views)

Introduction: A variety of pesticides is used to combat weeds. Check-resistant residues of contaminants in drinking water resources have detrimental effects on human health and on environment. In recent years, advanced oxidation methods o remove toxins from the environment, particularly the aquatic environment is further considered.

Methods: In this study, samples adding different concentrations (mg/L10, 20, 30) of pesticides were prepared in deionized water. Specimens of the individual phases in a batch reactor with the catalyst (g / L 1 ,2, 3 and, 4), pH (3,5, 7, 9, 11) and contact time (60, 120, 180, 240 min) exposure contacts coupled Ag / ZnO and UV-c was performed.

Results: The results showed a reduction in pesticide concentrations (2, 4-D) and increasing the reaction time, the degradation efficiency increases. The highest degradation efficiency was for 240 minutes and the initial concentration of toxin was (2, 4-D) 10 mg/L  to 96 percent. The kinetics of the elimination of toxins (2, 4-D) by the process of photocatalytic Ag / ZnO in the presence of UV-C light corresponded to the pseudo first.

CONCLUSION: The most effective degradation of toxins (2, 4-D) by the process of photocatalytic Ag / ZnO under conditions of neutral pH and with increasing reaction time and reduce toxin concentrations (2, 4-D) is the result.

Full-Text [PDF 309 kb]   (211 Downloads)    
Type of Study: Research | Subject: General
Received: 2014/08/17 | Accepted: 2014/09/27 | Published: 2016/03/12

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