1
|
Zhao H, Yang L, Chen X, Wang J, Bai L, Cao G, Cai L, Tang CY. Reactivity of various brominating agents toward polyamide nanofiltration membranes. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
2
|
Cheng W, Wang P, Zhang Y, Wang H, Ma J, Zhang T. Oxidation resistances of polyamide nanofiltration membranes to hydroxyl and sulfate radicals. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
3
|
Xie Y, Yang L, Chen X, Zhao H, Cao G, Li X, Bai L, Meng S, Wang R. The role of iron present in water environment in degradation of polyamide membranes by free chlorine. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
4
|
Solvent remelted nylon polyamide nanofibrous substrate that enhances thin-film composite membranes for organic solvent nanofiltration. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120322] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
5
|
Wang J, Li SL, Guan Y, Zhu C, Gong G, Hu Y. Novel RO membranes fabricated by grafting sulfonamide group: Improving water permeability, fouling resistance and chlorine resistant performance. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.119919] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
6
|
Mohona TM, Dai N, Nalam PC. Comparative Degradation Kinetics Study of Polyamide Thin Films in Aqueous Solutions of Chlorine and Peracetic Acid Using Quartz Crystal Microbalance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14214-14227. [PMID: 34793175 DOI: 10.1021/acs.langmuir.1c02835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Polyamide thin film composite membranes are widely used in water reclamation. Peracetic acid (PAA) is an emerging wastewater disinfectant with a potential for membrane cleaning and disinfection; however, its interaction with polyamide remains poorly understood. This study employs quartz crystal microbalance with dissipation (QCM-D) to determine the PAA-induced degradation kinetics of polyamide thin films, in comparison with the conventional disinfectant-free chlorine (HOCl). Polyamide films showed a sorption phase followed by a degradation phase when exposed to PAA (1000 mg L-1) and HOCl (100 mg L-1) solutions. While the sorption phase in HOCl experiments was short (1.4-3.5 min) and followed a Boltzmann-sigmoidal model, it spanned over 3-33 h in PAA experiments and displayed a two-stage behavior. The latter kinetics are attributed to sequential processes of the physical sorption of PAA in polyamide films followed by PAA-induced polyamide oxidation. In the degradation phase, the HOCl-exposed films followed a rapid, two-step exponential decay reaching an equilibrium mass of ∼50% of the initial (wet) mass after ∼5 h of exposure. In contrast, the PAA-exposed films followed a Boltzmann-sigmoidal decay, with ∼80% of the initial (wet) mass remaining intact after >10 h of exposure. Fast force maps generated using atomic force microscopy showed a progressive increase in the morphological heterogeneity of the polyamide films in HOCl solution due to pitting, cracking, bulging, and eventual delamination under both flow and no-flow conditions. In contrast, PAA only formed small pits on the polyamide film under flow; in a stagnant PAA solution, the film had no visible changes even after ∼148 h of exposure. This is the first comparative study on the chemical and morphological changes in polyamide films induced by PAA and HOCl. The much higher compatibility of polyamide with PAA than with chlorine supports the potential of PAA being used as a halogen-free membrane cleaning/disinfecting agent.
Collapse
Affiliation(s)
- Tashfia M Mohona
- Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, New York 14260, United States
| | - Ning Dai
- Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, New York 14260, United States
| | - Prathima C Nalam
- Department of Materials Design and Innovation, University at Buffalo, Buffalo, New York 14260, United States
| |
Collapse
|
7
|
Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse osmosis membranes. Front Chem Sci Eng 2021. [DOI: 10.1007/s11705-021-2109-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
8
|
Hashiba K, Nakai S, Nishijima W, Ohno M, Gotoh T. Degradation of secondary polyamide reverse osmosis membrane by hypochlorite in the presence of calcium ions. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
9
|
Wang T, Wen J, Guo S, Mu L. Hypochlorite and visible-light irradiation affect the transformation and toxicity of graphene oxide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:138010. [PMID: 32213413 DOI: 10.1016/j.scitotenv.2020.138010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 03/12/2020] [Accepted: 03/16/2020] [Indexed: 05/27/2023]
Abstract
Graphene oxide (GO) that has many advanced properties, has been applied in various fields, such as water treatments and removal of contaminations. Hypochlorite is widely used in water treatments. However, the effects of hypochlorite on the transformations and risks of GO, and the toxicological responses remain largely unknown, especially under visible-light irradiation. The present work found that visible-light irradiation promoted the breakdown of sp2 structures of GO by hypochlorite, producing alkanes and arenes with short carbon skeletons. Compared to oxygen-containing radicals, chlorine-related radicals contributed to the breakdown of carbon atomic rings of GO. Compared to pristine GO, the transformed GO inhibited algal reproduction, reduced photosynthesis, and promoted oxidative stress and membrane permeability. Substantial plasmolysis and increased numbers of starch grains were observed in the exposure groups. Metabolomics analysis found that oxidative stress and increased membrane permeability linked to downregulated proline. The downregulated pathways of alanine, aspartate and glutamate metabolism were associated with the inhibition of algal reproduction. The downregulated pathways related to protein synthesis and the secondary metabolism explained the strong toxicity induced by GO with hypochlorite and visible-light irradiation. The above results provide insight into the safety assessment of GO.
Collapse
Affiliation(s)
- Tong Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Jingyu Wen
- Tianjin Key Laboratory of Agro-environment and Safe-product, Key Laboratory for environmental factors control of Agro-product quality safety (Ministry of Agriculture and Rural Affairs), Institute of Agro-environmental Protection, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Shuqing Guo
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Li Mu
- Tianjin Key Laboratory of Agro-environment and Safe-product, Key Laboratory for environmental factors control of Agro-product quality safety (Ministry of Agriculture and Rural Affairs), Institute of Agro-environmental Protection, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
| |
Collapse
|
10
|
Wan H, Islam MS, Briot NJ, Schnobrich M, Pacholik L, Ormsbee L, Bhattacharyya D. Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater. J Memb Sci 2020; 594:117454. [PMID: 31929677 PMCID: PMC6953629 DOI: 10.1016/j.memsci.2019.117454] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The poly(methacrylic acid) (PMAA) was synthesized in the pores of commercial microfiltration PVDF membranes to allow incorporation of catalytic palladium/iron (Pd/Fe) nanoparticles for groundwater remediation. Particles of 17.1 ± 4.9 nm size were observed throughout the pores of membranes using a focused ion beam. To understand the role of Pd fractions and particle compositions, 2-chlorobiphenyl was used as a model compound in solution phase studies. Results show H2 production (Fe0 corrosion in water) is a function of Pd coverage on the Fe. Insufficient H2 production caused by higher coverage (> 10.4% for 5.5 wt%) hindered dechlorination rate. With 0.5 wt% Pd, palladized-Fe reaction rate (surface area normalized reaction rate, ksa = 0.12 L/(m2-h) was considerably higher than isolated Pd and Fe particles. For groundwater, in a single pass of Pd/Fe-PMAA-PVDF membranes (0.5 wt% Pd), chlorinated organics, such as trichloroethylene (177 ppb) and carbon tetrachloride (35 ppb), were degraded to 16 and 0.3 ppb, respectively, at 2.2 seconds of residence time. The degradation rate (observed ksa) followed the order of carbon tetrachloride > trichloroethylene > tetrachloroethylene > chloroform. A 36 h continuous flow study with organic mixture and the regeneration process show the potential for on-site remediation.
Collapse
Affiliation(s)
- Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Md Saiful Islam
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Nicolas J Briot
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| | | | - Lucy Pacholik
- Department of Civil Engineering University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Lindell Ormsbee
- Department of Civil Engineering University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| |
Collapse
|
11
|
Yu L, Ling R, Chen JP, Reinhard M. Quantitative assessment of the iron-catalyzed degradation of a polyamide nanofiltration membrane by hydrogen peroxide. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.05.078] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|