Application of 3D-fluorescence/PARAFAC to monitor the performance of managed aquifer recharge facilities

Journal of Water Reuse and Desalination

Regnery, Julia¹  Stahlschmidt, Maximilian²  Drewes, Jörg E.²  Campbell, Andy³ 

[1] Advanced Water Technology Center (AQWATEC), Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO, USA;Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany;Inland Empire Utilities Agency, Chino, CA, USA

关键词: dissolved organic matter;    managed aquifer recharge;    recycled water;    three dimensional (3D)-fluorescence spectroscopy;   

DOI  :  10.2166/wrd.2015.220

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

3D-fluorescence spectroscopy was used as a monitoring tool to describe the fate and transport of dissolved organic matter (DOM) during groundwater recharge using recycled water, imported water, and stormwater at a managed aquifer recharge site in California. The study was supplemented by analysis of conservative wastewater-derived trace organic chemicals using liquid chromatography coupled with tandem mass spectrometry. Parallel factor analyses (PARAFAC) yielded six different independent fluorophoric components by mathematically decomposing the excitation emission spectra. The results revealed that this approach was successful in showing the decrease of chromophoric DOM in the subsurface over time and distance during recharge and detecting anthropogenic contaminations that were introduced into the recharge basins, most likely from weed and vector control applications. PARAFAC was able to extract at least one herbicide with chromophoric features from surface and groundwater excitation-emission matrices, suggesting that this approach could also be applied as a pollution control tool for hazardous events.

【 授权许可】

CC BY-NC-ND