Pilot-scale treatment of atrazine production wastewater by UV/O3/ultrasound: Factor effects and system optimization

Pilot-scale treatment of atrazine production wastewater by UV/O3/ultrasound: Factor effects and... This study shed light on removing atrazine from pesticide production wastewater using a pilot-scale UV/O3/ultrasound flow-through system. A significant quadratic polynomial prediction model with an adjusted R2 of 0.90 was obtained from central composite design with response surface methodology. The optimal atrazine removal rate (97.68%) was obtained at the conditions of 75 W UV power, 10.75 g h−1 O3 flow rate and 142.5 W ultrasound power. A Monte Carlo simulation aided artificial neural networks model was further developed to quantify the importance of O3 flow rate (40%), UV power (30%) and ultrasound power (30%). Their individual and interaction effects were also discussed in terms of reaction kinetics. UV and ultrasound could both enhance the decomposition of O3 and promote hydroxyl radical (OH·) formation. Nonetheless, the dose of O3 was the dominant factor and must be optimized because excess O3 can react with OH·, thereby reducing the rate of atrazine degradation. The presence of other organic compounds in the background matrix appreciably inhibited the degradation of atrazine, while the effects of Cl−, CO32− and HCO3− were comparatively negligible. It was concluded that the optimization of system performance using response surface methodology and neural networks would be beneficial for scaling up the treatment by UV/O3/ultrasound at industrial level. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Environmental Management Elsevier

Pilot-scale treatment of atrazine production wastewater by UV/O3/ultrasound: Factor effects and system optimization

Loading next page...
 
/lp/elsevier/pilot-scale-treatment-of-atrazine-production-wastewater-by-uv-o3-8AiHkFLmPi
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0301-4797
D.O.I.
10.1016/j.jenvman.2017.07.027
Publisher site
See Article on Publisher Site

Abstract

This study shed light on removing atrazine from pesticide production wastewater using a pilot-scale UV/O3/ultrasound flow-through system. A significant quadratic polynomial prediction model with an adjusted R2 of 0.90 was obtained from central composite design with response surface methodology. The optimal atrazine removal rate (97.68%) was obtained at the conditions of 75 W UV power, 10.75 g h−1 O3 flow rate and 142.5 W ultrasound power. A Monte Carlo simulation aided artificial neural networks model was further developed to quantify the importance of O3 flow rate (40%), UV power (30%) and ultrasound power (30%). Their individual and interaction effects were also discussed in terms of reaction kinetics. UV and ultrasound could both enhance the decomposition of O3 and promote hydroxyl radical (OH·) formation. Nonetheless, the dose of O3 was the dominant factor and must be optimized because excess O3 can react with OH·, thereby reducing the rate of atrazine degradation. The presence of other organic compounds in the background matrix appreciably inhibited the degradation of atrazine, while the effects of Cl−, CO32− and HCO3− were comparatively negligible. It was concluded that the optimization of system performance using response surface methodology and neural networks would be beneficial for scaling up the treatment by UV/O3/ultrasound at industrial level.

Journal

Journal of Environmental ManagementElsevier

Published: Dec 1, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off