CHENFeiyu,YANGLifeng,SONGHualong,et al.Occurrence Characteristics and Migration Transformation of Perfluorinated Compounds in a Typical Dyeing and Finishing Wastewater Treatment Plant[J].China Water & Wastewater,2026,42(3):18-24.
Occurrence Characteristics and Migration Transformation of Perfluorinated Compounds in a Typical Dyeing and Finishing Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第3期
Page:
18-24
Column:
Date of publication:
2026-02-01
- Keywords:
- dyeing and finishing wastewater; perfluorinated compounds; treatment process; occurrence characteristics; migration and transformation
- Abstract:
- This study aimed to assess the occurrence and removal of perfluorinated compounds (PFCs) in a typical dyeing and finishing wastewater treatment plant. A comprehensive investigation was conducted on the concentration distribution, compositional profile, and migration transformation behavior of PFCs throughout the entire treatment process. Over a six-month sampling campaign, water samples were collected from various treatment units. Twenty target PFCs were analyzed using liquid chromatography-tandem mass spectrometry, alongside conventional water quality parameters. Results revealed the presence of 14 PFCs, with total concentrations ranging from 417 ng/L to 1 100 ng/L, dominated by perfluorocarboxylic acids (PFCAs, >93.4%). While the process achieved satisfactory removal of conventional pollutants, it demonstrated negligible removal efficiency for PFCs. Specifically, coagulation-sedimentation enabled adsorptive removal of long-chain PFCAs (e.g. PFDA and PFUdA, up to 40.9%), but increased the concentrations of short-chain PFCAs. Both aerobic and anaerobic biological units significantly increased the concentrations of various PFCAs (up to 234.0%) due to the continuous transformation of precursors (e.g. fluorotelomer alcohols). The terminal Fenton process effectively degraded long?chain PFCAs (e.g. PFUdA，up to 95.1%), but exhibited limited removal of short?chain PFCAs (C4-C6, average removal of -106.3% to 5.1%). This study confirms that conventional treatment processes serve not only as a passage for PFCs into the environment but also as a “transformer” and “secondary release source” for short?chain PFCs, posing a potential risk of secondary release.
Last Update:
2026-02-01