首页|多氨基改性蔗渣对水溶液中pb2+、Zn2+、Cd2+、Cu2+吸附性能的研究

多氨基改性蔗渣对水溶液中pb2+、Zn2+、Cd2+、Cu2+吸附性能的研究

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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。
Adsorption Behavior of the Multi-amino-modified Bagasse for Pb( Ⅱ ),Zn( Ⅱ),Cd( Ⅱ ) and Cu( Ⅱ ) in Aqueous Solution
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+.

multi-amino-modified bagassecellulosePb2+Zn2+Cd2+Cu2+adsorption

伍婵翠、梁英、唐新智、莫异业

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桂林电子科技大学生命与环境科学学院,桂林541004

多氨基改性蔗渣 纤维素 Pb2+ Zn2+ Cd2+ Cu2+ 吸附

广西自然科学基金广西科学计划项目

桂科青0832080桂科攻1140002-2-4

2012

材料导报
重庆西南信息有限公司

材料导报

CSTPCDCSCD北大核心
影响因子:0.605
ISSN:1005-023X
年,卷(期):2012.26(12)
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