Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes
Herein, a method for detecting microplastics in water using single-entity electrochemistry is presented, with a focus on the interaction between microplastics in aqueous solution and the surface of an ultramicroelectrode (UME). Polystyrene and polypropylene, two commonly used plastics that were grou...
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MDPI AG
2024-12-01
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| Online Access: | https://www.mdpi.com/2227-9040/12/12/278 |
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| author | Changhui Lee Sangwon Han Jun Hui Park |
| author_facet | Changhui Lee Sangwon Han Jun Hui Park |
| author_sort | Changhui Lee |
| collection | DOAJ |
| description | Herein, a method for detecting microplastics in water using single-entity electrochemistry is presented, with a focus on the interaction between microplastics in aqueous solution and the surface of an ultramicroelectrode (UME). Polystyrene and polypropylene, two commonly used plastics that were ground and dispersed in aqueous solution, served as the detection target materials. The collisional contact of microplastics with the UME was transduced into a discernible signal. To detect microplastics in solution using an UME, redox species (e.g., ferrocyanide) were continuously oxidized at the electrode, and the resulting steady-state current was monitored. Collisional contact followed by adsorption of microplastics on the UME disturbed the diffusional flux of redox species, resulting in an immediate change in the steady-state current. Detection sensitivity was further enhanced by optimizing the electrolyte composition to induce a migration effect. COMSOL Multiphysics simulations were employed to analyze the magnitude of the current changes as a function of microplastic size. The size distribution obtained from the simulations closely matched measurements from dynamic light scattering (DLS). |
| format | Article |
| id | doaj-art-ac1f48b0ef1c4b6e8b54bc220f45182c |
| institution | Kabale University |
| issn | 2227-9040 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj-art-ac1f48b0ef1c4b6e8b54bc220f45182c2024-12-27T14:17:08ZengMDPI AGChemosensors2227-90402024-12-01121227810.3390/chemosensors12120278Electrochemical Detection of Microplastics in Water Using UltramicroelectrodesChanghui Lee0Sangwon Han1Jun Hui Park2Department of Chemistry, Chungbuk National University, Cheongju 28644, Republic of KoreaDepartment of Chemistry, Chungbuk National University, Cheongju 28644, Republic of KoreaDepartment of Chemistry, Chungbuk National University, Cheongju 28644, Republic of KoreaHerein, a method for detecting microplastics in water using single-entity electrochemistry is presented, with a focus on the interaction between microplastics in aqueous solution and the surface of an ultramicroelectrode (UME). Polystyrene and polypropylene, two commonly used plastics that were ground and dispersed in aqueous solution, served as the detection target materials. The collisional contact of microplastics with the UME was transduced into a discernible signal. To detect microplastics in solution using an UME, redox species (e.g., ferrocyanide) were continuously oxidized at the electrode, and the resulting steady-state current was monitored. Collisional contact followed by adsorption of microplastics on the UME disturbed the diffusional flux of redox species, resulting in an immediate change in the steady-state current. Detection sensitivity was further enhanced by optimizing the electrolyte composition to induce a migration effect. COMSOL Multiphysics simulations were employed to analyze the magnitude of the current changes as a function of microplastic size. The size distribution obtained from the simulations closely matched measurements from dynamic light scattering (DLS).https://www.mdpi.com/2227-9040/12/12/278microplasticelectrochemistrycollisionsimulationultramicroelectrode |
| spellingShingle | Changhui Lee Sangwon Han Jun Hui Park Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes Chemosensors microplastic electrochemistry collision simulation ultramicroelectrode |
| title | Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes |
| title_full | Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes |
| title_fullStr | Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes |
| title_full_unstemmed | Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes |
| title_short | Electrochemical Detection of Microplastics in Water Using Ultramicroelectrodes |
| title_sort | electrochemical detection of microplastics in water using ultramicroelectrodes |
| topic | microplastic electrochemistry collision simulation ultramicroelectrode |
| url | https://www.mdpi.com/2227-9040/12/12/278 |
| work_keys_str_mv | AT changhuilee electrochemicaldetectionofmicroplasticsinwaterusingultramicroelectrodes AT sangwonhan electrochemicaldetectionofmicroplasticsinwaterusingultramicroelectrodes AT junhuipark electrochemicaldetectionofmicroplasticsinwaterusingultramicroelectrodes |