本研究的目的是研究使用气体的纳滤（NF）膜的孔径分布（PSD） 吸附和原子力显微镜（AFM）的方法，并阐明的机制负责 不同溶质（罗丹明、亚砷酸和氯化钠）的通过 通过纳滤（NF）膜。罗丹明WT（R-WT），一种具有 分子量480道尔顿，批准用作饮用水中的示踪剂 水被用作有机溶质的替代物。 测定了两种药物的WT-R浓度 使用鲍曼系列2发光光谱仪。 激发波长为550nm，发射波长为570-700nm。 最低定量水平为50 ng/L。还研究了两种无机溶质， 氯化钠和亚砷酸钠。用离子色谱法分析氯离子 标准方法4110B使用型号为DX-300的Dionex离子色谱仪，亚砷酸的浓度通过热分析仪测定 Elemental ExCell电感耦合等离子体/质谱（ICP）- MS）使用钇作为内标。 实验室规模的实验是用一个由两个串联的扁平叶细胞组成的闭环系统进行的。每个平叶细胞由两个不锈钢组成 316个板，由底部放置的两个o形圈密封的膜试片隔开 盘子给水进入每个细胞，并通过底部的给水通道循环 平行于膜表面的板。实验是用从一张纸上切下的小试样进行的 ESNA或TFCS NF膜。 包括2个参考文献、表格和图表。

The objective of this study was to investigate the pore size distribution (PSD) of nanofiltration (NF) membranes using gas adsorption and Atomic Force Microscopy (AFM) methods and to elucidate the mechanisms responsible for the passage of different solutes (Rhodamine-WT, arsenious acid and sodium chloride) through nanofiltration (NF) membranes. Rhodamine-WT (R-WT), a fluorescent chemical with molecular weight of 480 Daltons and approved for use as a tracer chemical in drinking water, was used as a surrogate for organic solutes. R-WT concentrations were measured using a Bowman Series 2 Luminescence Spectrometer. An excitation wavelength of 550 nm and emission wavelength of 570-700 nm were used. The minimum quantification level was 50 ng/L. Two inorganic solutes were also studied, sodium chloride and sodium arsenite. Chloride ion was analyzed by ion chromatography Standard Method 4110B using a Dionex Ion Chromatograph Model DX-300, and the concentration of arsenious acid was determined by a Thermo Elemental ExCell Inductively Coupled Plasma/Mass Spectrometry (ICP-MS) using Yttrium as an internal standard. Lab-scale experiments were performed with a closed-loop system consisting of two flat-leaf cells connected in series. Each flat-leaf cell consisted of two stainless steel 316 plates, separated by a membrane coupon sealed by two o-rings placed in the bottom plate. Feed water went into each cell and circulated through a feed channel in the bottom plate parallel to the membrane surface. Experiments were performed with small coupons cut from a sheet of ESNA or TFCS NF membranes. Includes 2 references, table, figures.