[Introduction]Electroplating industry is one of the major sources of pollution by perfluorinated and polyfluoroalkyl substances (PFASs). However,research on the new pollutants discharged from the whole chain of typical electroplating production and corresponding wastewater treatment stations is relatively lacking currently.[Method]An electroplating park in Pearl River Delta (PRD) was selected as the study object. 30 kinds of typical PFASs i.e. perfluoroalkyl carboxylic acids (PFCAs),perfluoroalkyl sulfonic acids (PFSAs),and common substitutes for perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) were detected,and their contamination characteristics were analyzed.[Result]PFASs are present in various electroplating processes. Not only the largest number and highest concentration of PFASs were detected in chromium plating process,but also some prohibited compounds such as PFOS,PFOA,and PFHxS (perfluorohexanesulfonic acid) were detected. The influent from the centralized wastewater treatment facilities had the highest concentrations and detection rates for PFOS and 6:2 FTS (sodium perfluorooctanesulfonate),indicating a severe pollution of them. Although the centralized wastewater treatment facilities had some synergistic treatment effect on PFASs,HFPO-DA[perfluoro(2-methyl-3-oxahexanoic) acid],which was not present in the influent,was detected in the effluent,suggesting that the transformation of PFASs in wastewater treatment system needs to be further studied.[Conclusion]In response to the pollution of PFASs in electroplating parks,the government can establish a new pollutant screening and monitoring and environmental risk assessment system. Electroplating parks should establish a registration system for chemicals used in enterprises. Enterprises must implement the requirements of the key control list for new pollutants.
electroplating parkwastewaterperfluorinated and polyfluoroalkyl substancespollution characteristiccontrol countermeasure
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