TiO_2/漂珠对垃圾渗滤液吸附性能研究

Study on adsorption property of TiO_2/float pearls on landfill leachate

为了研究TiO_2/漂珠对垃圾渗滤液吸附性能,通过SEM、XRD、FT-IR、BET对其结构进行表征,并探究了溶液起始浓度、起始pH、催化剂投加量对垃圾渗滤液吸附的影响。结果表明,当COD浓度为540mg/L,TiO_2/漂珠投加量为3g/L,pH=10时,垃圾渗滤液的TOC吸附量为5.03mg/g。研究还发现TiO_2/漂珠吸附动力学符合伪二级动力学方程,吸附过程大致分为3个阶段:在0~3h内,总有机碳(TOC)含量减少;在3~10h内,TOC含量增加;在10~24h内,吸附达到平衡。

The adsorption properties of TiO2/float pearls on landfill leachate was discussed.The structure of TiO2/float pearls was characterized with SEM,XRD,FT-IR and BET,and the effects of the initial concentration,the dosage of TiO2/float pearls and the pH on the adsorption of landfill leachate were investigated.The results showed that the highest TOC capacity of landfill leachate was 5.03mg/g,when its pH was 10,the concentration of COD was 540mg/L and the dosage of catalyst was 3g/L.The research also found that the adsorption dynamics of TiO2/float pearls followed the pseudo second order kinetics,the adsorption process divided into three stages：the concentration of total organic carbon（TOC）was reduced within 0-3hours;the concentration of TOC was increased within 3-10hours;the adsorption reached balance within 10-24hours.