摘要：

采用焙烧法对水滑石(HT)进行改性处理,探讨了改性水滑石(MHT)对垃圾渗滤液生化尾水中TN、NH₄⁺-N、COD_Cr、TP的吸附性能及其再生性能.结果表明:当MHT投加质量浓度为6 g/L、振荡时间为60 min、振速为150 r/min、pH=7时,MHT对TN、NH₄⁺-N、COD_Cr、TP的吸附量分别可达70.29、31.75、171.49、5.11 mg/g,吸附过程符合准二级动力学模型.

关键词: 改性水滑石, 吸附, 渗滤液尾水, 脱氮除磷, 再生

Abstract:

Roasting method has been used for the modification of hydrotalcite (HT). The adsorption capacity and its regeneration capacity of total nitrogen(TN),ammonia nitrogen(NH₄⁺-N),chemical oxide demand(COD_Cr) and total phosphorus(TP) in biological treated landfill leachate tail water by modified hydrotalcite(MHT) are discussed. The results show that the adsorption capacities of MHT for TN,NH₄⁺-N,COD_Cr and TP are 70.29,31.75,171.49,5.11 mg/g,respectively,when the mass concentration of MHT dosage is 6 g/L,vibrating time 60 min,vibrating speed 150 r/min and pH=7. The adsorption follows the pseudo-second order type kinetic model well under the experimental conditions.

Key words: modified hydrotalcite, adsorption, landfill leachate tail water, nitrogen and phosphorus removal, regeneration

中图分类号: 

• X703