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Modeling the rejection of antipyrine by nanofiltration membranes

Authors： Wu Fang, Feng Li, Zhang Liqiu*

Units： Beijing Forestry University Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing 100083)

KeyWords： nanofiltration; antipyrine; film theory; solution-diffusion model; prediction model

ClassificationCode：X52

year,volume(issue):pagination： 2016,36(4):97-102

Abstract：

Nanofiltration is an effective method to remove trace drug pollutants in water. In this paper, a netural drug antipyrine (ANT) was chosen to evaluate the prediction results with film theory and solution-diffusion mode by NF-X. Firstly, the permeate flux and rejection were obtained at different pressure and feed concentrations. The results indicated that the permeate flux and pressure were linearly related at a certain temperature and it was independent on the feed concentration. Then the unknown parameters k and DK/δ in the model were determined by the experimental data and the mass transfer coefficient k could be calculated by the feed concentration (k=αCoβ) through the best-fit method, while DK/δ was nearly constant. Thus the prediction model was established under different pressure and feed concentration conditions (25?C, pH=7). Finally, the rejections of ANT at other concentrations and pressures were predicted with relative error less than 10%, indicating that the prediction results were satisfactory.

Funds：

国家水体污染控制与治理科技重大专项(2013ZX07201007-003-01)、北京市自然科学基金项目（8152022）、国家自然科学基金项目（No.51178046）

AuthorIntro：

作者简介：吴芳（1989.01.12），女，河北保定人，硕士研究生，E-mail: wfbd112@163.com。研究方向为纳滤去除水中中性药物污染物影响因素及预测模型研究。

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