改性沸石负载纳米铁／镍去除地下水中2，4-二氯苯酚的渗透反应格栅研究

摘要

The 2 ,4-dichlorophenol batch and column experiments were carried out to study the removal effect of 2 ,4-dichlorophenol by preparation of modified zeolite supported nano zero valent iron ickel and application of the material in the groundwater pollution situ-remediation .The result showed that the prepa-ration of bimetallic particles with good dispersion avoided the emergence of the phenomenon of agglomera -tion.The removal of 2,4-dichlorophenol in water is the result of the synergistic action of degradation and adsorption on the surface of the composite ,and the degradation of phenol in the whole process has a grea-ter effect.By permeable reactive barrier experiments in different pore volume of the pH ,ORP and temper-ature were found that the solution is in weak alkaline condition , and not conducive to remove chloride . However ORP system and temperature were conducive to 2,4-dichlorophenol dechlorination reaction .%为研究新制备复合材料改性沸石负载纳米零价铁／镍去除水中2，4-二氯苯酚效果以及该材料在地下水污染原位修复中的应用情况，开展了2，4-二氯苯酚的批实验和柱实验。结果表明，材料的双金属颗粒分散性良好，避免了团聚现象的出现。水中2，4-二氯苯酚的去除是在复合材料表面降解和吸附协同作用的结果，且降解在整个过程发挥更大的作用。通过渗透反应格栅实验中不同孔隙体积下 pH、ORP、温度的考察发现，溶液处于弱碱性状态，不利于脱氯反应的进行，而体系ORP和温度均有利于2，4-二氯苯酚的脱氯反应。