An integrated membrane distillation, photocatalysis and polyelectrolyte-enhanced ultrafiltration process for arsenic remediation at point-of-use
(2021) In Desalination 520.- Abstract
Arsenic contamination of drinking water is a result of natural and/or anthropogenic activities, causing undesirable detrimental effects on the environment and the human health. Herein, an integrated process based on Membrane Distillation (MD), photocatalysis and Polymer-enhanced Ultrafiltration (PEUF) was developed for an effective remediation of arsenic (As). This approach, whose effectiveness was demonstrated by experimental tests on artificial solution mimicking As-contaminated water in the area of Sila Massif (Italy), ensured a near total water recovery and a rational management of residual contaminants. MD allowed to produce high-quality freshwater from contaminated feedwater containing As in the range of 0.059-5 mg·L-1,... (More)
Arsenic contamination of drinking water is a result of natural and/or anthropogenic activities, causing undesirable detrimental effects on the environment and the human health. Herein, an integrated process based on Membrane Distillation (MD), photocatalysis and Polymer-enhanced Ultrafiltration (PEUF) was developed for an effective remediation of arsenic (As). This approach, whose effectiveness was demonstrated by experimental tests on artificial solution mimicking As-contaminated water in the area of Sila Massif (Italy), ensured a near total water recovery and a rational management of residual contaminants. MD allowed to produce high-quality freshwater from contaminated feedwater containing As in the range of 0.059-5 mg·L-1, without deterioration of the transmembrane flux up to a recovery factor of 98.8%. Furthermore, a photocatalytic step was applied on MD retentate to convert arsenite As (III) into arsenate As(V), the latter subsequently removed by PEUF with efficiency of 98.2%. Speciation analysis demonstrated the necessity to reduce the feed pH to 5.6 in order to avoid the risk of scaling in MD stage, whereas Na2CO3 softening at pH 9 before the photocatalytic stage ensured both the reactive precipitation of Ca and Mg ions and the depletion of bicarbonate ions.
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- author
- Santoro, Sergio ; Timpano, Paola ; Avci, Ahmet Halil LU ; Argurio, Pietro ; Chidichimo, Francesco ; De Biase, Michele ; Straface, Salvatore and Curcio, Efrem
- publishing date
- 2021-12-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Arsenic remediation, Membrane distillation, Photocatalysis, Polymer-enhanced ultrafiltration, Zero liquid discharge
- in
- Desalination
- volume
- 520
- article number
- 115378
- pages
- 10 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85116092416
- ISSN
- 0011-9164
- DOI
- 10.1016/j.desal.2021.115378
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2021 Elsevier B.V.
- id
- 40c0c0f5-3c3f-4027-8dbf-f2d581ed84ba
- date added to LUP
- 2022-05-13 10:45:04
- date last changed
- 2022-05-13 11:21:28
@article{40c0c0f5-3c3f-4027-8dbf-f2d581ed84ba, abstract = {{<p>Arsenic contamination of drinking water is a result of natural and/or anthropogenic activities, causing undesirable detrimental effects on the environment and the human health. Herein, an integrated process based on Membrane Distillation (MD), photocatalysis and Polymer-enhanced Ultrafiltration (PEUF) was developed for an effective remediation of arsenic (As). This approach, whose effectiveness was demonstrated by experimental tests on artificial solution mimicking As-contaminated water in the area of Sila Massif (Italy), ensured a near total water recovery and a rational management of residual contaminants. MD allowed to produce high-quality freshwater from contaminated feedwater containing As in the range of 0.059-5 mg·L<sup>-1</sup>, without deterioration of the transmembrane flux up to a recovery factor of 98.8%. Furthermore, a photocatalytic step was applied on MD retentate to convert arsenite As (III) into arsenate As(V), the latter subsequently removed by PEUF with efficiency of 98.2%. Speciation analysis demonstrated the necessity to reduce the feed pH to 5.6 in order to avoid the risk of scaling in MD stage, whereas Na<sub>2</sub>CO<sub>3</sub> softening at pH 9 before the photocatalytic stage ensured both the reactive precipitation of Ca and Mg ions and the depletion of bicarbonate ions.</p>}}, author = {{Santoro, Sergio and Timpano, Paola and Avci, Ahmet Halil and Argurio, Pietro and Chidichimo, Francesco and De Biase, Michele and Straface, Salvatore and Curcio, Efrem}}, issn = {{0011-9164}}, keywords = {{Arsenic remediation; Membrane distillation; Photocatalysis; Polymer-enhanced ultrafiltration; Zero liquid discharge}}, language = {{eng}}, month = {{12}}, publisher = {{Elsevier}}, series = {{Desalination}}, title = {{An integrated membrane distillation, photocatalysis and polyelectrolyte-enhanced ultrafiltration process for arsenic remediation at point-of-use}}, url = {{http://dx.doi.org/10.1016/j.desal.2021.115378}}, doi = {{10.1016/j.desal.2021.115378}}, volume = {{520}}, year = {{2021}}, }