Development and evaluation of a ceramic diffusive layer based DGT technique for measuring organic micropollutants in seawaters

Huaijun Xie; Yingchao Dong; Jingwen Chen; Xueling Wang; Mao Fu

doi:10.1016/j.envint.2021.106653

Development and evaluation of a ceramic diffusive layer based DGT technique for measuring organic micropollutants in seawaters

Environ Int. 2021 Nov:156:106653. doi: 10.1016/j.envint.2021.106653. Epub 2021 May 24.

Authors

Huaijun Xie¹, Yingchao Dong¹, Jingwen Chen², Xueling Wang¹, Mao Fu¹

Affiliations

¹ Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
² Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China. Electronic address: jwchen@dlut.edu.cn.

PMID: 34034115
DOI: 10.1016/j.envint.2021.106653

Abstract

Diffusive gradients in thin-films (DGT) technique has been well demonstrated as a robust tool for measuring organic micropollutants (OMPs) in the aquatic environment. However, potential adsorption of the OMPs on organic polymer filters and flow rate of waters can affect the measuring results of the DGT method, hence tedious work should be conducted to reduce these interferences. In the present study, a novel DGT technique coupled with a ceramic diffusive layer was developed to measure the OMPs in seawaters. The ceramic diffusive layer exhibited adsorption inertness to the OMPs with various logK_ow values. Moreover, the ceramic diffusive layer based DGT technique was proved to be less affected by the flow rate than the traditional DGT with agarose diffusive layer. The developed DGT device exhibited kinetic accumulation for the targets during a 6-d deployment, and measurement of the OMPs by the DGT method was independent with pH and ionic strength. Finally, the developed DGT sampler was applied in coastal waters of Dalian, and eight OMPs were detected with levels ranging from 1.58 to 13.1 ng/L. The development of the ceramic diffusive membrane can lead to simplification of the DGT applications, promoting the progress of the OMPs monitoring technology.

Keywords: Ceramic diffusive layer; Diffusive gradients in thin-films; Organic micropollutants; Seawater.

Publication types

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

MeSH terms

Ceramics
Diffusion
Environmental Monitoring*
Seawater
Water Pollutants, Chemical* / analysis

Substances

Water Pollutants, Chemical