Effect of colloids on the occurrence, distribution and photolysis of emerging organic contaminants in wastewaters

Caixia Yan; Minghua Nie; Yi Yang; Junliang Zhou; Min Liu; Mohammed Baalousha; Jamie R Lead

doi:10.1016/j.jhazmat.2015.06.022

Effect of colloids on the occurrence, distribution and photolysis of emerging organic contaminants in wastewaters

J Hazard Mater. 2015 Dec 15:299:241-8. doi: 10.1016/j.jhazmat.2015.06.022. Epub 2015 Jun 18.

Authors

Caixia Yan¹, Minghua Nie², Yi Yang³, Junliang Zhou⁴, Min Liu⁵, Mohammed Baalousha⁶, Jamie R Lead⁶

Affiliations

¹ School of Geography and Environment, Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, No. 99, Ziyang Road, Nanchang 330022, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China; (SmartState) Center for Environmental Nanoscience and Risk, Arnold School of Public Health, University of South Carolina, 921 Assembly Street, Columbia 29208,USA.
² School of Geography and Environment, Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, No. 99, Ziyang Road, Nanchang 330022, China; Department of Environmental Science and Engineering, Fudan University, 220Handan Road, Shanghai 200433, China.
³ State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China; Key Laboratory of Geographic Information Science of the Ministry of Education, Department of Geosciences, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China. Electronic address: yyang@geo.ecnu.edu.cn.
⁴ State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China.
⁵ Key Laboratory of Geographic Information Science of the Ministry of Education, Department of Geosciences, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China.
⁶ (SmartState) Center for Environmental Nanoscience and Risk, Arnold School of Public Health, University of South Carolina, 921 Assembly Street, Columbia 29208,USA.

PMID: 26135483
DOI: 10.1016/j.jhazmat.2015.06.022

Abstract

The effect of colloids on the occurrence, phase distribution and photolysis of twenty-seven emerging organic contaminants (EOCs) was studied in domestic and livestock wastewaters (DW and LW), respectively. Filtered water (<1 μm) was separated into permeate (<1 kDa) and retentate (1 kDa-1 μm) by cross flow ultrafiltration. Results indicated that total concentration of EOCs ranged from 1220 ng L(-1) in permeate of DW to 5065 ng L(-1) in retentate of LW. The average EOC fraction associated with colloids was 13.5% and 14.4% in DW and LW. Most of the EOCs exhibited pseudo-first-order degradation kinetics in all water samples. Control experiments using glass and quartz reactors showed that UV light was more effective on the photolysis of most EOCs. The EOCs photolysis in the three fractions of DW and LW could be accelerated or inhibited compared to ultrapure water with the enhancement factor ranging from -0.94 to 7.33. The impact of colloids on the photolysis of EOCs depended on the compound and the source of water. The photolysis of most EOCs in permeates and filtrates was generally accelerated, while inhibited in the retentates, which could be attributed to the relatively high dissolved organic carbon contents in retentates.

Keywords: Colloids; Emerging organic contaminants (EOCs); Photolysis; Ultraviolet (UV).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Colloids / chemistry*
Organic Chemicals / analysis*
Organic Chemicals / chemistry
Wastewater / chemistry*
Water Pollutants, Chemical / analysis*
Water Pollutants, Chemical / chemistry

Substances

Colloids
Organic Chemicals
Waste Water
Water Pollutants, Chemical