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逐层改性多通道超滤毛细管膜对盐分保留和抗生素抗性基因去除的性能

Performance of Layer-by-Layer-Modified Multibore Ultrafiltration Capillary Membranes for Salt Retention and Removal of Antibiotic Resistance Genes.

作者信息

Niestroj-Pahl Robert, Stelmaszyk Lara, ElSherbiny Ibrahim M A, Abuelgasim Hussein, Krug Michaela, Staaks Christian, Birkholz Greta, Horn Harald, Li Tian, Dong Bingzhi, Dähne Lars, Tiehm Andreas, Panglisch Stefan

机构信息

Surflay Nanotec GmbH, Max-Planck-Str. 3, 12489 Berlin, Germany.

Technologiezentrum Wasser, Karlsruher Straße 84, 76139 Karlsruhe, Germany.

出版信息

Membranes (Basel). 2020 Dec 6;10(12):398. doi: 10.3390/membranes10120398.

DOI:10.3390/membranes10120398
PMID:33291315
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7762176/
Abstract

Polyether sulfone Multibore ultrafiltration membranes were modified using polyelectrolyte multilayers via the layer-by-layer (LbL) technique in order to increase their rejection capabilities towards salts and antibiotic resistance genes. The modified capillary membranes were characterized to exhibit a molecular weight cut-off (at 90% rejection) of 384 Da. The zeta-potential at pH 7 was -40 mV. Laboratory tests using single-fiber modified membrane modules were performed to evaluate the removal of antibiotic resistance genes; the LbL-coated membranes were able to completely retain DNA fragments from 90 to 1500 nt in length. Furthermore, the pure water permeability and the retention of single inorganic salts, MgSO, CaCl and NaCl, were measured using a mini-plant testing unit. The modified membranes had a retention of 80% toward MgSO and CaCl salts, and 23% in case of NaCl. The modified membranes were also found to be stable against mechanical backwashing (up to 80 LMH) and chemical regeneration (in acidic conditions and basic/oxidizing conditions).

摘要

聚醚砜多通道超滤膜通过层层（LbL）技术用聚电解质多层膜进行改性，以提高其对盐类和抗生素抗性基因的截留能力。改性后的毛细管膜的截留分子量（截留率为90%时）为384 Da。pH值为7时的zeta电位为-40 mV。使用单纤维改性膜组件进行了实验室测试，以评估抗生素抗性基因的去除情况；层层包覆的膜能够完全截留长度为90至1500 nt的DNA片段。此外，使用小型装置测试单元测量了纯水渗透率以及单一无机盐MgSO₄、CaCl₂和NaCl的截留率。改性膜对MgSO₄和CaCl₂盐的截留率为80%，对NaCl的截留率为23%。还发现改性膜对机械反冲洗（高达80 LMH）和化学再生（在酸性条件以及碱性/氧化条件下）具有稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1a04/7762176/21787ad0ca5e/membranes-10-00398-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1a04/7762176/21787ad0ca5e/membranes-10-00398-g011.jpg

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