草甘膦母液的沉淀处理研究

Precipitation Treatment of Glyphosate Mother Liquor

[目的]探究有效去除草甘膦母液中亚磷酸根的方法。[方法]采用化学沉淀法研究了沉淀剂种类、pH、投加量、静置时间等因素对草甘膦母液中亚磷酸根去除率的影响。[结果]加入AlCl3.6H2O,当pH为9、投加量0.24 mol/L、快搅30 s、强度300 r/min、慢搅2.5min、强度100 r/min、静置时间为30 min时对草甘膦母液中亚磷酸根的去除效果达到60%以上。[结论]为膜技术在草甘膦母液资源化处理中的工业化推广与应用提供了理论依据。

[Objective] The aim was to study a removal method of HPO32-from glyphosate mother liquor.[Method] Effects of precipitant quantity and type,pH and standing time on the removal rate of HPO32-from glyphosate mother liquor were studied by chemical precipitation method.[Result] When the initial pH was 9,the following pretreatment procedure resulted in the removal rate of more than 60% of the HPO32-from glyphosate mother liquor：the addition of 0.24 mol/L AlCl3·6H2O,stirring at 300 r/min for 30 s and 100 r/min for 2.5 min,followed by standing for 30 min.[Conclusion] The research result provides theoretical basis for the industrial popularization and application of membrane technology in resourceful treatment of glyphosate mother liquor.