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当前位置: 首页 > 文章 > PAM包覆改性硅藻土吸附模拟废水中的Cd~(2+) 中南林业科技大学学报 2011,31 (7) 130-135
Position: Home > Articles > Diatomic modified by PAM and applied to adsorb Cd~(2+) in the simulated sewage Journal of Central South University of Forestry & Technology 2011,31 (7) 130-135

PAM包覆改性硅藻土吸附模拟废水中的Cd~(2+)

作  者：
杨文;王平;王韬远;罗文连;朱健
单  位：
中南林业科技大学环境科学与工程研究中心;河北大学化学与环境科学学院;中南林业科技大学环境科学与工程研究所;湖南华亿市政工程设计有限公司
关键词：
PAM;改性硅藻土;重金属;Cd2+;正交试验
摘  要：
研究用PAM包覆改性硅藻土并应用于处理含Cd2+模拟废水。探究了PAM浓度、pH值以及初始浓度的变化对改性硅藻土吸附Cd2+的影响。结论表明:与原土相比,改性硅藻土对酸性重金属废水的适应性增强,pH值为1.5时,改性硅藻土吸附(C0=200 mg/L)Cd2+的吸附容量是原土的2.75倍;改性硅藻土对高浓度的Cd2+废水去除效果比原土更好;改性后硅藻土的表面结构性能得到增强,有利于吸附带正电Cd2+;SEM结构表征表明,改性硅藻土表面光滑,杂质较少,PAM以分子层形式吸附在硅藻土的表面及其孔隙内。
译  名：
Diatomic modified by PAM and applied to adsorb Cd~(2+) in the simulated sewage
作  者：
YANG Wen1,WANG Ping1,WANG Tao-yuan3,LUO Wen-lian1,2,ZHU Jian1(1.Institute of Environmental Science and Engineering Research,Central South University of Forestry & Technology,Changsha 410004,Hunan,China;2.Hunan Jiufang Science and Technolege Co.Ltd,Zhuzhou 412007,Hunan,China;3.College of Chemistry & Environmental Science,Hebei University,Baoding 071002,Hebei,China)
关键词：
PAM;modified diatomic;heavy metals;Cd2+;orthogonal experiment
摘  要：
The study on the diatomic modified by PAM and applied to adsorpt cadmium ions(Cd2+) in the simulated sewage was made.The concentration of PAM,the pH as well as initial concentration were studied to investigate the influence of the modified diatomic on adsorpt ion of Cd2+.The conclusions indicate:compared with the raw diatomic,the adaption of modified diatomic to acid heavymetals sewage enhanced,and the modified diatomic capacity was 2.75 times of the raw diatomic when the pH=1.5(C0=200mg/L);the removal rates of the sewage with hign concentration of Cd2+ removed by modified diatomic was better;the structrue of moified diatomic enhanced and it was more advantageous in adsropting the electronegativity of Cd2+;the surface of the modified diatomic was more smooth and with little inpurites,and PAM was adsorpted on it's surface or in it's pores with a style of moleculer layers.

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