PMID- 37513052
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230801
IS  - 2079-4991 (Print)
IS  - 2079-4991 (Electronic)
IS  - 2079-4991 (Linking)
VI  - 13
IP  - 14
DP  - 2023 Jul 10
TI  - Enhanced Degradation of Methyl Orange and Trichloroethylene with 
      PNIPAm-PMMA-Fe/Pd-Functionalized Hollow Fiber Membranes.
LID - 10.3390/nano13142041 [doi]
LID - 2041
AB  - Trichloroethylene (TCE) is a prominent groundwater pollutant due to its 
      stability, widespread contamination, and negative health effects upon human 
      exposure; thus, an immense need exists for enhanced environmental remediation 
      techniques. Temperature-responsive domains and catalyst incorporation in membrane 
      domains bring significant advantages for toxic organic decontamination. In this 
      study, hollow fiber membranes (HFMs) were functionalized with stimuli-responsive 
      poly-N-isopropylacrylamide (PNIPAm), poly-methyl methacrylate (PMMA), and 
      catalytic zero-valent iron/palladium (Fe/Pd) for heightened reductive degradation 
      of such pollutants, utilizing methyl orange (MO) as a model compound. By 
      utilizing PNIPAm's transition from hydrophilic to hydrophobic expression above 
      the LCST of 32  degrees C, increased pollutant diffusion and adsorption to the catalyst 
      active sites were achieved. PNIPAm-PMMA hydrogels exhibited 11.5x and 10.8x 
      higher equilibrium adsorption values for MO and TCE, respectively, when 
      transitioning from 23  degrees C to 40  degrees C. With dip-coated PNIPAm-PMMA-functionalized 
      HFMs (weight gain: ~15%) containing Fe/Pd nanoparticles (d(p)~34.8 nm), surface 
      area-normalized rate constants for batch degradation were determined, resulting 
      in a 30% and 420% increase in degradation efficiency above 32  degrees C for MO and TCE, 
      respectively, due to enhanced sorption on the hydrophobic PNIPAm domain. Overall, 
      with functionalized membranes containing superior surface area-to-volume ratios 
      and enhanced sorption sites, efficient treatment of high-volume contaminated 
      water can be achieved.
FAU - Mills, Rollie
AU  - Mills R
AUID- ORCID: 0000-0003-1816-2510
AD  - Department of Chemical and Materials Engineering, University of Kentucky, 
      Lexington, KY 40508, USA.
FAU - Tvrdik, Cameron
AU  - Tvrdik C
AD  - Department of Chemical and Materials Engineering, University of Kentucky, 
      Lexington, KY 40508, USA.
FAU - Lin, Andrew
AU  - Lin A
AD  - Department of Chemical and Materials Engineering, University of Kentucky, 
      Lexington, KY 40508, USA.
FAU - Bhattacharyya, Dibakar
AU  - Bhattacharyya D
AUID- ORCID: 0000-0001-9948-9085
AD  - Department of Chemical and Materials Engineering, University of Kentucky, 
      Lexington, KY 40508, USA.
LA  - eng
GR  - P42 ES007380/ES/NIEHS NIH HHS/United States
GR  - P42ES007380/ES/NIEHS NIH HHS/United States
PT  - Journal Article
DEP - 20230710
PL  - Switzerland
TA  - Nanomaterials (Basel)
JT  - Nanomaterials (Basel, Switzerland)
JID - 101610216
PMC - PMC10386459
OTO - NOTNLM
OT  - PNIPAm
OT  - bimetallic catalysts
OT  - hollow fiber membrane
OT  - methyl orange
OT  - thermoresponsive
OT  - trichloroethylene
OT  - water detoxification
OT  - zero-valent iron
COIS- The authors declare no conflict of interest.
EDAT- 2023/07/29 11:44
MHDA- 2023/07/29 11:45
PMCR- 2023/07/10
CRDT- 2023/07/29 01:33
PHST- 2023/06/06 00:00 [received]
PHST- 2023/07/05 00:00 [revised]
PHST- 2023/07/07 00:00 [accepted]
PHST- 2023/07/29 11:45 [medline]
PHST- 2023/07/29 11:44 [pubmed]
PHST- 2023/07/29 01:33 [entrez]
PHST- 2023/07/10 00:00 [pmc-release]
AID - nano13142041 [pii]
AID - nanomaterials-13-02041 [pii]
AID - 10.3390/nano13142041 [doi]
PST - epublish
SO  - Nanomaterials (Basel). 2023 Jul 10;13(14):2041. doi: 10.3390/nano13142041.