Experimental study on nanofiltration separation of high concentrated saline glyphosate solution

TANG Yuanhui; HU Yang; YAN Zhiqin; LI Chunyu

doi:10.11949/0438-1157.20190014

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Experimental study on nanofiltration separation of high concentrated saline glyphosate solution

Separation engineering | 更新时间：2026-07-24

- Experimental study on nanofiltration separation of high concentrated saline glyphosate solution
- CIESC Journal Vol. 70, Issue 7, Pages: 2574-2583(2019)
- 作者机构：
  
  1.中国矿业大学（北京）化学与环境工程学院，北京 100083
  2.中国科协学会服务中心，北京 100081
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190014
  CLC： TQ 028
- Received：07 January 2019，
  
  Revised：2019-04-15，
  
  Online First：24 July 2026，
  
  Published：05 July 2019
- 稿件说明：
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唐元晖, 扈阳, 燕至琴, 李春玉. 高浓度含盐草甘膦溶液的纳滤分离实验研究[J]. 化工学报, 2019, 70(7): 2574-2583

TANG Yuanhui, HU Yang, YAN Zhiqin, LI Chunyu. Experimental study on nanofiltration separation of high concentrated saline glyphosate solution[J]. CIESC Journal, 2019, 70(7): 2574-2583
唐元晖, 扈阳, 燕至琴, 李春玉. 高浓度含盐草甘膦溶液的纳滤分离实验研究[J]. 化工学报, 2019, 70(7): 2574-2583 DOI： 10.11949/0438-1157.20190014.

TANG Yuanhui, HU Yang, YAN Zhiqin, LI Chunyu. Experimental study on nanofiltration separation of high concentrated saline glyphosate solution[J]. CIESC Journal, 2019, 70(7): 2574-2583 DOI： 10.11949/0438-1157.20190014.

摘要

为了考察纳滤技术分离含高浓度单价盐的草甘膦溶液的可行性，采用商业化Desal-DK纳滤膜对含有高浓度NaCl的草甘膦溶液开展了分离实验研究和模拟计算。首先研究了物料浓度、跨膜压差等因素对NaCl和草甘膦的单组分溶液的体积通量及截留率的影响，并通过拟合SK（Spiegler-Kedem）方程计算得到了膜的特征参数；其次探究了Desal-DK纳滤膜对高浓度NaCl和不同浓度草甘膦混合溶液的分离效果，实验结果说明Desal-DK纳滤膜对NaCl呈现较高的透过性，而对草甘膦则呈现较高的截留性，从而能够有效实现草甘膦和NaCl的分离；最后通过对含有100 g/L NaCl和1 g/L草甘膦的混合溶液进行预浓缩-连续恒容渗滤过程的模拟计算，得到了较高浓度的草甘膦溶液和相对较纯的NaCl溶液，证明通过纳滤渗滤过程实现含草甘膦浓盐水的资源化利用是可行的。

Abstract

To investigate the feasibility of nanofiltration technology to separate glyphosate solution containing high concentration of monovalent salt

a commercial Desal-DK nanofiltration membrane was used to carry out separation experiments and simulation calculations of glyphosate solution containing high concentration of NaCl. Firstly

effects of feed compositions and transmembrane pressures on the flux and the solute retention for single solutions were investigated by the NF filtration experiments. Membrane parameters were obtained by fitting the experimental results to the SK (Spiegler-Kedem) equations. The results showed that the Desal-DK NF membrane had a low rejection to NaCl and a high rejection to glyphosate for the single solutions. For the high-concentrated binary component solutions

volumetric fluxes of the mixed solution is significantly reduced compared to the single solutions

while the NF membrane presented higher retention rate (more than 90%) to glyphosate and a lower rejection (less than 10%) to NaCl. Finally the selective separation of NaCl and glyphosate by NF diafiltration was simulated for the binary solution containing 1 g/L glyphosate and 100 g/L NaCl. After pre-concentration and diafiltration

a highly concentrated solution of glyphosate (7.43 g/L) and a relatively pure solution of NaCl (89.02 g/L) were obtained. This work demonstrated that DK NF membrane is a practical way for the separation of glyphosate and NaCl in the industry.

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Keywords

references

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