Characterizing fluorescence fingerprints of different types of metal plating wastewater by fluorescence excitation-emission matrix
| Autor: | Bo Liu, Jing Wu, Jian Shen, Chuanyang Liu, Yidi Chai, Cheng Cheng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
010501 environmental sciences Wastewater 01 natural sciences Biochemistry Metal 03 medical and health sciences 0302 clinical medicine Plating 030212 general & internal medicine Electroplating Effluent Humic Substances 0105 earth and related environmental sciences General Environmental Science Excitation emission matrix Pulp and paper industry Fluorescence Spectrometry Fluorescence visual_art visual_art.visual_art_medium Sewage treatment Factor Analysis Statistical Water Pollutants Chemical |
| Zdroj: | Environmental research. 194 |
| ISSN: | 1096-0953 |
| Popis: | To prevent the illegal discharge of metal plating wastewater (MPW), it is necessary to explore a monitoring method that could achieve the identification of MPW in natural water bodies. Fluorescence excitation-emission matrix-parallel factor (EEM-PARAFAC) analysis might be a promising tool for the detection of MPW. However, before conducting the practical monitoring, the apparent fluorescence features of different kinds of MPW must be first understood. In this study, six types of MPW (576 samples) from ten metal plating plants were collected and their fluorescence fingerprints (FFs) were characterized by EEM-PARAFAC analysis. Results showed that pretreatment wastewater (PTW), copper-contained electroplating wastewater (Cu-EPW), nickel-contained electroplating wastewater (Ni-EPW), copper-contained electroless wastewater (Cu-ELW), nickel-contained electroless wastewater (Ni-ELW), and metal plating effluent (MPE) presented one, three, one, one, two, and three types of FFs, respectively. Among them, three individual fluorescent components were identified in Ni-EPW and two were decomposed in other kinds of MPW. Owing to the discrepancies of production processes, electroplating additives, wastewater treatment techniques, and management levels, different metal plating plants owned different FFs. By spectral comparison, the tyrosine-like components in PTW and Ni-ELW might derived from some phenolic and benzenesulfonic acidic compounds. Fluorescent component similarity analysis indicated that EEM-PARAFAC technique could distinguish the raw and treated MPW. This study not only constructed the first FF database for MPW, but also provided valuable guidance for their practical monitoring in aquatic environment. |
| Databáze: | OpenAIRE |
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