Chitosan/polyvinylpyrrolidone/polyvinyl alcohol/carbon nanotubes dual layers nanofibrous membrane constructed by electrospinning-electrospray for water purification.
Carbohydr Polym
; 294: 119756, 2022 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-35868783
ABSTRACT
Nanofibrous membrane have great potential in the field of water purification due to the high porosity and large specific surface area. Herein, a dual layers nanofibrous membrane was prepared by combining an active layer containing carbon nanotubes (CNTs) with a porous chitosan (CS)/polyvinylpyrrolidone (PVP)/polyvinyl alcohol (PVA) nanofibrous support layer via electrospinning-electrospray technique for highly efficient heavy metal and organic pollutants removal. Incorporating CNTs into the active layer offered additional nanochannels which significantly enhanced pure water permeate flux (1533.26â¯L·m-2·h-1) and heavy metal ions/dyes rejection (Cu2+ 95.68â¯%, Ni2+ 93.86â¯%, Cd2+ 88.52â¯%, Pb2+ 80.41â¯%, malachite green 87.20â¯%, methylene blue 76.33â¯%, and crystal violet 63.39â¯%). The optimal membranes were formed with a thickness of 20⯵m and a roughness of 142â¯nm while still showing good perm-selectivity compared with commercial PVDF membrane. Moreover, the constructed membrane exhibited good antifouling property and long-term stability during filtration process. This work provides a new strategy to fabricate advanced separation membranes for water treatment.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Purificação da Água
/
Metais Pesados
/
Nanotubos de Carbono
/
Quitosana
/
Nanofibras
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2022
Tipo de documento:
Article