Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 297, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2022.121443
Keywords
Loose nanofiltration membrane; Streptomycin; Permselectivity; Anti-fouling; Dye/salt separation
Categories
Funding
- National Natural Science Foundation of China [U2006220, 52070035]
- Jilin Province Scientifc and the Technological Planning Project of China [20200403001SF]
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A antibacterial nanofiltration membrane with high permselectivity and anti-fouling performance was prepared using streptomycin and trimesoyl chloride via interfacial polymerization. The as-prepared membrane exhibited excellent rejection of dyes and low rejection of salts, and showed good operational stability.
Nanofiltration (NF) membrane with excellent dye/salt permselectivity and anti-fouling performance is highly desired for the separation of dye/salt mixture in dye wastewater treatment. In this work, the antibacterial NF membrane with high permselectivity and anti-fouling performance was prepared by using a hydrophilic anti-biotic, streptomycin (SM) with abundant amino and hydroxyl groups, as the aqueous monomer via interfacial polymerization (IP) with trimesoyl chloride (TMC). The as-prepared antibiotic membrane had a hydrophilic and highly smooth surface, which was beneficial to the membrane anti-fouling performance. The membrane per-formance was optimized by tuning the concentration of SM, and the optimized membrane with desirable water permeance of 23.5 L.m(-2).h(-1).bar(-1 )had excellent dyes rejections (the rejections of Direct red 23 (DR 23), Congo red (CR), Acid red 66 (AR 66), Victoria blue B (VB), and Chrome black T (CBT) were 99.7%, 99.6%, 99.0%, 99.5%, 99.7%, respectively) and low salts rejection (the rejections of NaCl and Na2SO4 were 1.9% and 4.5%, respectively). The optimized membrane also showed excellent separation performance to salt/dye mixed solu-tions and operational stability. This newly streptomycin-based NF membrane showed excellent application po-tential in the dye wastewater treatment.
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