Abstract
Triiodide, a larger charged molecule compared to iodide, is thermodynamically favored with the presence of both iodide and iodine, and is easier to be retained by membrane processes. For the first time, iodide was recovered in the form of triiodide by forward osmosis (FO) for thin-film transistor liquid crystal display industries by preoxidation of iodide to triiodide. Partial oxidation by NaOCl was used to convert the iodide to iodine and then to form triiodide. Ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), a commonly used chelating agent in the industry, was used as the draw solute because of its low reverse salt flux. The results revealed that the ideal efficiency of iodide recovery was at pH 3 with a preoxidation (adding 0.0150 M NaClO) for the 0.048 M iodide wastewater with a recovery of 98.5%. Additionally, the Pourbaix diagram and starch indicator were used to verify the formation of triiodide. Membrane distillation was demonstrated to recover the EDTA-2Na draw solute, and more than 99% of recoveries for the draw solutes with initial water flux of 12.0 L/m2 h were achieved, indicating that simultaneous recovery of the EDTA-2Na draw solute and water is feasible.
Original language | English |
---|---|
Article number | 123637 |
Journal | Journal of Hazardous Materials |
Volume | 403 |
DOIs | |
State | Published - 5 Feb 2021 |
Bibliographical note
Funding Information:
All the authors of this research are thankful for the financial supply from the Ministry of Science and Technology (MOST), Republic of China (Taiwan) under grant number 107-2221-E-027-001-MY3.
Funding Information:
All the authors of this research are thankful for the financial supply from the Ministry of Science and Technology (MOST), Republic of China (Taiwan) under grant number 107-2221-E-027-001-MY3 .
Publisher Copyright:
© 2020 Elsevier B.V.
Keywords
- Draw solution
- Forward osmosis
- Iodide recovery
- Membrane distillation
- Triiodide
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Chang, H. M., Chen, S. S., Chen, Y. T., Chang, W. S., Li, C. W., Nguyen, N. C., Ray, S. S., & Cao, D. T. N. (2021). Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis. Journal of Hazardous Materials, 403, [123637]. https://doi.org/10.1016/j.jhazmat.2020.123637
Chang, Hau Ming ; Chen, Shiao Shing ; Chen, Yu Ting et al. / Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis. In: Journal of Hazardous Materials. 2021 ; Vol. 403.
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title = "Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis",
abstract = "Triiodide, a larger charged molecule compared to iodide, is thermodynamically favored with the presence of both iodide and iodine, and is easier to be retained by membrane processes. For the first time, iodide was recovered in the form of triiodide by forward osmosis (FO) for thin-film transistor liquid crystal display industries by preoxidation of iodide to triiodide. Partial oxidation by NaOCl was used to convert the iodide to iodine and then to form triiodide. Ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), a commonly used chelating agent in the industry, was used as the draw solute because of its low reverse salt flux. The results revealed that the ideal efficiency of iodide recovery was at pH 3 with a preoxidation (adding 0.0150 M NaClO) for the 0.048 M iodide wastewater with a recovery of 98.5%. Additionally, the Pourbaix diagram and starch indicator were used to verify the formation of triiodide. Membrane distillation was demonstrated to recover the EDTA-2Na draw solute, and more than 99% of recoveries for the draw solutes with initial water flux of 12.0 L/m2 h were achieved, indicating that simultaneous recovery of the EDTA-2Na draw solute and water is feasible.",
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Chang, HM, Chen, SS, Chen, YT, Chang, WS, Li, CW, Nguyen, NC, Ray, SS & Cao, DTN 2021, 'Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis', Journal of Hazardous Materials, vol. 403, 123637. https://doi.org/10.1016/j.jhazmat.2020.123637
Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis. / Chang, Hau Ming; Chen, Shiao Shing; Chen, Yu Ting et al.
In: Journal of Hazardous Materials, Vol. 403, 123637, 05.02.2021.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis
AU - Chang, Hau Ming
AU - Chen, Shiao Shing
AU - Chen, Yu Ting
AU - Chang, Wen Shing
AU - Li, Chi Wang
AU - Nguyen, Nguyen Cong
AU - Ray, Saikat Sinha
AU - Cao, Dan Thanh Ngoc
N1 - Publisher Copyright:© 2020 Elsevier B.V.
PY - 2021/2/5
Y1 - 2021/2/5
N2 - Triiodide, a larger charged molecule compared to iodide, is thermodynamically favored with the presence of both iodide and iodine, and is easier to be retained by membrane processes. For the first time, iodide was recovered in the form of triiodide by forward osmosis (FO) for thin-film transistor liquid crystal display industries by preoxidation of iodide to triiodide. Partial oxidation by NaOCl was used to convert the iodide to iodine and then to form triiodide. Ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), a commonly used chelating agent in the industry, was used as the draw solute because of its low reverse salt flux. The results revealed that the ideal efficiency of iodide recovery was at pH 3 with a preoxidation (adding 0.0150 M NaClO) for the 0.048 M iodide wastewater with a recovery of 98.5%. Additionally, the Pourbaix diagram and starch indicator were used to verify the formation of triiodide. Membrane distillation was demonstrated to recover the EDTA-2Na draw solute, and more than 99% of recoveries for the draw solutes with initial water flux of 12.0 L/m2 h were achieved, indicating that simultaneous recovery of the EDTA-2Na draw solute and water is feasible.
AB - Triiodide, a larger charged molecule compared to iodide, is thermodynamically favored with the presence of both iodide and iodine, and is easier to be retained by membrane processes. For the first time, iodide was recovered in the form of triiodide by forward osmosis (FO) for thin-film transistor liquid crystal display industries by preoxidation of iodide to triiodide. Partial oxidation by NaOCl was used to convert the iodide to iodine and then to form triiodide. Ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), a commonly used chelating agent in the industry, was used as the draw solute because of its low reverse salt flux. The results revealed that the ideal efficiency of iodide recovery was at pH 3 with a preoxidation (adding 0.0150 M NaClO) for the 0.048 M iodide wastewater with a recovery of 98.5%. Additionally, the Pourbaix diagram and starch indicator were used to verify the formation of triiodide. Membrane distillation was demonstrated to recover the EDTA-2Na draw solute, and more than 99% of recoveries for the draw solutes with initial water flux of 12.0 L/m2 h were achieved, indicating that simultaneous recovery of the EDTA-2Na draw solute and water is feasible.
KW - Draw solution
KW - Forward osmosis
KW - Iodide recovery
KW - Membrane distillation
KW - Triiodide
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AN - SCOPUS:85089429180
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JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
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ER -
Chang HM, Chen SS, Chen YT, Chang WS, Li CW, Nguyen NC et al. Recovery of iodide as triiodide from thin-film transistor liquid crystal display wastewater by forward osmosis. Journal of Hazardous Materials. 2021 Feb 5;403:123637. doi: 10.1016/j.jhazmat.2020.123637