化工学报2019，Vol.70Issue(7)：2574-2583,10.DOI:10.11949/0438-1157.20190014
高浓度含盐草甘膦溶液的纳滤分离实验研究
Experimental study on nanofiltration separation of high concentrated saline glyphosate solution
摘要
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.关键词
纳滤/分离/氯化钠/草甘膦/废水Key words
nanofiltration/separation/sodium chloride/glyphosate/waste water分类
化学化工引用本文复制引用
TANG Yuanhui,HU Yang,YAN Zhiqin,LI Chunyu..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):2574-2583,10.基金项目
国家自然科学基金项目(20141300604) （20141300604）
中国矿业大学(北京)2016年中央高校基本科研业务费青年教师科研专项(8000151R) （北京）
