地下水中氯化钠对某新型释氧材料性能的影响

The Effect of NaCl on the Properties of a New Oxygen Releasing Material

释氧化合物应用于地下水有机污染原位修复技术具有广阔的应用前景,然而地下水中各离子组分对释氧化合物性能的影响却鲜有文献提及。本研究建立了一套地下水流模拟装置,以含有热解改性含油污泥残渣的新型释氧材料(Modified Oxygen Releasing Compound,简称MORC)作为研究对象,采用Na Cl溶液和去离子水作为对照组,探讨Na Cl对MORC释氧性能的影响,并采用扫描电镜对MORC表面矿物结构进行表征。研究结果表明:Na Cl对MORC释氧具有显著的促进作用,当Na Cl溶液浓度为1 000 mg/L、3 000 mg/L时,其促进释氧率分别为12.91%和14.13%。MORC释氧过程中产生的矿物沉淀逐渐在MORC表面沉积,导致材料表面释氧孔道堵塞是影响MORC释氧的重要限制因素。

The Oxygen releasing compound used in in- situ remediation technology of groundwater organic pollution has a broad application prospect. However,documents are rarely mentioned the effect of the compositions in groundwater on the properties of oxygen releasing compound. This study developed a groundwater flow simulation apparatus to discuss the influence of Na Cl towards the oxygen releasing process of the Modified Oxygen Releasing Compound（ MORC）,and adopting deionized water and Na Cl solution as the control group. furthermore,the scanning electron microscope are used to characterize？ the mineral component on the surface of MORC. The research results indicate that Na Cl can significantly improve the oxygen releasing rate of MORC. When the Na Cl solution concentrations are 1 000 mg / L and 3 000 mg / L,the average percentage of promoting oxygen releasing are 12. 91 % and 14. 14 % respectively. According to the results of scanning electron microscope analysis,the mineral generated during the oxygen releasing process will deposit on the surface of MORC gradually,and the oxygen releasing aisle congestion problem caused by the deposition is an important limiting factor that affects the oxygen releasing of MORC.