D301树脂吸附废水中草甘膦的研究

Study on Adsorption of Glyphosate Wastewater by D301 Resin

通过静态实验探究了吸附剂用量、氯离子浓度、磷酸盐浓度对D301树脂吸附废水中草甘膦的效果影响,同时研究了该吸附过程的动力学、等温线。结果表明,废水中草甘膦氯离子和磷酸盐浓度越高,D301树脂吸附效果越差,草甘膦去除率越低。该吸附过程符合Langmuir方程,为单层吸附,最大吸附量约为181.8mg/g,符合二级动力学模型。动态实验结果表明,当D301树脂吸附草甘膦达到穿透体积时,草甘膦去除率为79.3%。

Through static experiments, the effects of adsorbent dosage, chloride ion concentration and phosphate concentration on glyphosate wastewater treatment effect were investigated, and the kinetics and isotherms of the adsorption process were studied. The results showed that the higher the concentration of chloride and phosphate, the lower the removal rate of glyphosate, and the worse the adsorption effect. The adsorption process conformed to Langmuir equation, which was single-layer adsorption, the maximum adsorption amount was about 181.8 mg/g, and conformed to the second-order kinetic model. The dynamic experiments results showed that the removal rate of glyphosate was 79.3% when the penetration volume of glyphosate was reached by D301 resin.