Sugarcane bagasse was modified by multi-amino group to prepare for metal adsorbent The adsorp tion of Pb2+, Zn2+ , Cd2+ and Cu2+ from aqueous single metal solutions by the modification was studied. Within the test range, the results showed that, Pb2+ , Zn2+ , Cd2+ and Cu2+ were quickly adsorbed by the modification, the adsorption equilibration time of Pb2+ is 12h, and that of Zn2+ , Cd2+ and Cu2+ is 20h. respectively. The best adsorption pH is in the range of 4-5 for Pb2+ , about 6. 2 for Zn"' , and about 5 for Cd2+ and Cu2+ . The maximal adsorptive capacity of Pb2+ , Zn2+ , Cd2+ and Cu2+ is 34. 96mg/g,2. 24mg/g, 10. 40mg/g,2. 60mg/g, respectively. Langmuir and Freundlich equations can be used to fit the adsorption isotherm of Pb2+ , Zn2+ , Cd2+ and Cu2+.%蔗渣经多氨基改性处理后,得到多氨基改性蔗渣吸附剂.考察了多氨基改性蔗渣吸附剂对模拟废水中Pb2+、Zn2+、Cd2+、Cu2+的吸附性能,主要包括吸附时间、溶液pH值和温度对吸附量的影响以及吸附等温式的研究.研究表明,在实验范围内,Pb2+的吸附平衡时间为12h,适宜吸附Pb2+的pH值范围在4～5,Pb2+的最大吸附量为34.96mg/g；Zn2+的吸附平衡时间为20h,适宜吸附Zn2+的pH值在6.2左右,Zn2+的最大吸附容量为2.24mg/g;Cd2+的吸附平衡时间为20h,适宜吸附Cd2+的pH值在5.0左右,Cd2+的最大吸附容量为10.40mg/g; Cu2+的吸附平衡时间为20h；适宜吸附Cu2+的pH值在5.0左右；Cu2+在不同温度下的最大吸附容量为2.60mg/g.多氨基改性蔗渣对Pb2+、Zn2+、Cd2+、Cu2+的吸附均可用Freundlich方程和Langmuir方程描述.
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