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Development of hazardous micro-pollutants with nanofiltaration membranes

利用纳滤膜开发有害微污染物

基本信息

批准号：
15360285
负责人：
KISO Yoshiaki
金额：
$ 8.83万
依托单位：
Toyohashi University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360285/
关键词：
Nanofiltration membranes Hazardous organic micro-pollutants Molecular shape Molecular width pore radius adsorption property log P Inverse HPLC 農薬阻止特性吸着分子

项目摘要

(1) Experimental research on rejection properties of NF membrane for hazardous organic micro-pollutants : The apparent solute permeabities of aromatic pesticides showed high correlation with molecular weight of the pesticides. In the case of alkylphenols, the apparent solute permeabities were correlated linearly with log P, and n-nonylphenol was rejected at more than 95%. In addition, it was suggested that the solutes were adsorbed on the membranes. The results indicated the effects of the adsorption on solute removal performance.(2) Adsorption property of solute on NF membrane : Batch type adsorption experiments were conducted with NF membranes and polysulfon membrane, which is used as a support membrane of NF membranes. It was revealed that hydrophobic interaction is a major factor of the adsorption. The adsorption properties were examined by inverse HPLC technology: the particles of polyamide, which is similar polymer to that of skin layer of NF membrane, were used as a stationary phase. The experimental conditions were examined, and it was found that hydrophobic solutes were adsorbed on the polyamide.(3) Molecular sieving effects on the solute separation with NF membrane : A pore model incorporated molecular shape parameters (molecular width and molecular length) were developed, and pore sizes were evaluated. The rejection degrees calculated by the model corresponded very well to the experimental results.(4) Measurement of log P : It was revealed that HPLC-direct injection method was of use for log P measurement. The values of log P at ca. 5.7 were measured accurately.(5) Extraction performance of aromatic compounds with fibrous solid phase adsorbent : The extraction method using PBO fibers was developed in order to simplify the extraction procedure for hazardous organic micro-pollutants. The method was of use for the extraction of aromatic compounds.

(1)纳滤膜对有害有机微污染物截留性能的实验研究：芳香族农药的溶质表观渗透率与农药的分子量具有高度相关性。对于烷基酚，表观溶质渗透率与 log P 呈线性相关，正壬基酚的截留率超过 95%。此外，有人认为溶质被吸附在膜上。结果表明吸附对溶质去除性能的影响。(2)纳滤膜对溶质的吸附性能:以纳滤膜和作为纳滤膜支撑膜的聚砜膜进行间歇式吸附实验。结果表明，疏水相互作用是吸附的主要因素。采用反相高效液相色谱技术检测吸附性能：采用与纳滤膜皮层相似的聚合物聚酰胺颗粒作为固定相。对实验条件进行了考察，发现疏水性溶质被吸附在聚酰胺上。(3)分子筛对纳滤膜分离溶质的影响：建立了包含分子形状参数(分子宽度和分子长度)的孔模型，并评估了孔径。模型计算出的截留度与实验结果吻合得很好。(4)log P的测量：结果表明，HPLC-直接进样法可用于log P的测量。 ca 处的 log P 值。 5.7测量准确。(5)纤维状固相吸附剂对芳香族化合物的萃取性能：为了简化有害有机微污染物的萃取流程，开发了PBO纤维萃取方法。该方法可用于芳香族化合物的提取。