Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination
This paper selected microplastic polyethylene terephthalate (PET), commonly found in water/wastewater plant effluent, to investigate the changes of PET oxidized under ozonation (designated as ozonized PET), followed by sodium hypochlorite oxidation (designated as ozonized-chlorinated PET) and studie...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/1/259 |
| _version_ | 1797406613213020160 |
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| author | Ximiao Zhu Chenhui Hao Mengze Zhang Bingyan Lan |
| author_facet | Ximiao Zhu Chenhui Hao Mengze Zhang Bingyan Lan |
| author_sort | Ximiao Zhu |
| collection | DOAJ |
| description | This paper selected microplastic polyethylene terephthalate (PET), commonly found in water/wastewater plant effluent, to investigate the changes of PET oxidized under ozonation (designated as ozonized PET), followed by sodium hypochlorite oxidation (designated as ozonized-chlorinated PET) and studied their influence on the adsorption of the disinfection by-product bromoform (TBM). Fragmentation and cracks appeared on the oxidized PET surface. As the oxidation degree increased, the contact angle decreased from 137° to 128.90° and 128.50°, suggesting hydrophilicity was enhanced. FTIR and XPS analyses suggested that carbonyl groups increased on the surface of ozonized PET and ozonized-chlorinated PET, while the formation of intermolecular halogen bonds was possible when PET experienced dual oxidation. These physiochemical changes enhanced the adsorption of TBM. The adsorption capacity of TBM followed the order of ozonized-chlorinated PET (2.64 × 10<sup>−6</sup> μg/μg) > ozonized PET (2.58 × 10<sup>−6</sup> μg/μg) > pristine PET (2.43 × 10<sup>−6</sup> μg/μg). The impact of raw water characteristics on the adsorption of TBM onto PETs, such as the pH, and the coexistence of inorganic ions and macromolecules (humic acid, surfactant, and bovine serum albumin) were studied. A different predominant adsorption mechanism between TBM and pristine PET or oxidized PETs was proposed. |
| first_indexed | 2024-03-09T03:29:04Z |
| format | Article |
| id | doaj.art-05a294b9fc794a59b49cc99ccaeb9837 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T03:29:04Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-05a294b9fc794a59b49cc99ccaeb98372023-12-03T14:57:22ZengMDPI AGMolecules1420-30492022-12-0128125910.3390/molecules28010259Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and ChlorinationXimiao Zhu0Chenhui Hao1Mengze Zhang2Bingyan Lan3School of Environment, South China Normal University, Guangzhou 510006, ChinaSchool of Environment, South China Normal University, Guangzhou 510006, ChinaSchool of Environment, South China Normal University, Guangzhou 510006, ChinaSchool of Environment, South China Normal University, Guangzhou 510006, ChinaThis paper selected microplastic polyethylene terephthalate (PET), commonly found in water/wastewater plant effluent, to investigate the changes of PET oxidized under ozonation (designated as ozonized PET), followed by sodium hypochlorite oxidation (designated as ozonized-chlorinated PET) and studied their influence on the adsorption of the disinfection by-product bromoform (TBM). Fragmentation and cracks appeared on the oxidized PET surface. As the oxidation degree increased, the contact angle decreased from 137° to 128.90° and 128.50°, suggesting hydrophilicity was enhanced. FTIR and XPS analyses suggested that carbonyl groups increased on the surface of ozonized PET and ozonized-chlorinated PET, while the formation of intermolecular halogen bonds was possible when PET experienced dual oxidation. These physiochemical changes enhanced the adsorption of TBM. The adsorption capacity of TBM followed the order of ozonized-chlorinated PET (2.64 × 10<sup>−6</sup> μg/μg) > ozonized PET (2.58 × 10<sup>−6</sup> μg/μg) > pristine PET (2.43 × 10<sup>−6</sup> μg/μg). The impact of raw water characteristics on the adsorption of TBM onto PETs, such as the pH, and the coexistence of inorganic ions and macromolecules (humic acid, surfactant, and bovine serum albumin) were studied. A different predominant adsorption mechanism between TBM and pristine PET or oxidized PETs was proposed.https://www.mdpi.com/1420-3049/28/1/259polyethylene terephthalateoxidation processwater/wastewater treatment plantdisinfection by-productsbromoform |
| spellingShingle | Ximiao Zhu Chenhui Hao Mengze Zhang Bingyan Lan Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination Molecules polyethylene terephthalate oxidation process water/wastewater treatment plant disinfection by-products bromoform |
| title | Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination |
| title_full | Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination |
| title_fullStr | Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination |
| title_full_unstemmed | Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination |
| title_short | Enhanced Adsorption of Bromoform onto Microplastic Polyethylene Terephthalate Exposed to Ozonation and Chlorination |
| title_sort | enhanced adsorption of bromoform onto microplastic polyethylene terephthalate exposed to ozonation and chlorination |
| topic | polyethylene terephthalate oxidation process water/wastewater treatment plant disinfection by-products bromoform |
| url | https://www.mdpi.com/1420-3049/28/1/259 |
| work_keys_str_mv | AT ximiaozhu enhancedadsorptionofbromoformontomicroplasticpolyethyleneterephthalateexposedtoozonationandchlorination AT chenhuihao enhancedadsorptionofbromoformontomicroplasticpolyethyleneterephthalateexposedtoozonationandchlorination AT mengzezhang enhancedadsorptionofbromoformontomicroplasticpolyethyleneterephthalateexposedtoozonationandchlorination AT bingyanlan enhancedadsorptionofbromoformontomicroplasticpolyethyleneterephthalateexposedtoozonationandchlorination |