Identification of adsorption or degradation mechanism for the removal of different ionic dyes with iron-carbon micro-electrolysis process
| Autor: | Xiange Wu, Aafia Tehrim, Chen Linheng, Simin Xu, Changsheng Peng, Xixi Wei, Min Dai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Triphenylmethane
Process Chemistry and Technology Cationic polymerization 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Pollution chemistry.chemical_compound Adsorption chemistry Methyl orange Chemical Engineering (miscellaneous) Crystal violet Malachite green 0210 nano-technology Waste Management and Disposal Electrolytic process Methylene blue 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Journal of Environmental Chemical Engineering. 9:105690 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2021.105690 |
| Popis: | The Fe-C micro-electrolysis materials (Fe-C MEM) are thought to be a good candidate in dyes removal. In this work, two Fe-C MEM (M1 and M2) with different physiochemical properties were compared in the dyes removal. Three cationic dyes (Three cationic dyes (malachite green (MG), crystal violet (CV), methylene blue (MB)), as well as two anionic dyes (methyl orange (MO), sunset yellow (SY)), were chosen in the study. The results showed that the M2 exhibited a better porosity with higher ZVI content, contributing to a higher dyes removal efficiency for all five dyes. Meanwhile, the cationic dyes had a higher dyes removal efficiency than anionic dyes. When the dyes were mixed together, CV had a higher removal efficiency than MG, although MG was the highest in the single dye solution. The removal mechanism of the five dyes was different. The two cationic triphenylmethane dyes (CV and MG) could be degraded while the two anionic azo dyes (MO, SY) were not degraded but adsorbed on Fe-C MEM. MB was removed mainly based on adsorption and coagulation. |
| Databáze: | OpenAIRE |
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