生物质炭负载材料激活过硫酸盐降解水中2,4-二氯酚试验研究

Degradation of 2,4-dichlorophenol in Water by Biochar Supported Materials Activating Persulfate

设计可渗透反应柱模型,制备生物质炭负载硫化纳米零价铁(BC@S-nZVI)材料激活过硫酸盐(PS),研究污染物初始浓度、流速等因素对降解效果的影响,监测降解过程中相关参数变化分析其对水环境的影响。结果表明,过硫酸钠和污染物的质量比100可作为降解有机物的最佳质量配比,在一定范围内增加有机物浓度,减小流速和增加材料填充量,能提高污染物去除率。在材料使用期间,水环境中铁离子、氯离子、硫酸根离子经历先增加后减小的过程,当修复的水体为地下水时,修复完成后可以达到III类地下水质量标准。

A permeable reaction column model was designed to prepare biochar supported sulfide nano zero-valent iron(BC@S-nZVI)material to activate persulfate(PS).The influences of pollutants initial concentration,flow rate and other factors on the degradation effect were studied,and the changes of related parameters in the degradation process were monitored to analyze its influence on the water environment.The results showed that the mass ratio of sodium persulfate to pollutant equaled to 100 could be used as the best mass ratio of organic matter degradation.Increasing the concentration of organic matter in a certain range,reducing the flow rate and increasing the material filling amount could improve the pollutant removal rate.During the use of the material,iron ion,chloride ion and sulfate ion in the water environment experienced a process from increase to decrease.When the restored water environment was groundwater,the quality standard of class III groundwater could be reached after the restoration.