改性水滑石处理垃圾渗滤液生化尾水的试验研究

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、CODCr、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、CODCr、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。%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 (CODCr) 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,CODCrand 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.