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| 摘要: |
| 试验研究了pH值、吸附时间和吸附剂用量对膨润土吸附重金属离子Pb2 ,Zn2 ,Cr(VI)和Cd2 的影响.结果表明,在本试验的pH值、吸附时间及吸附剂用量条件下,膨润土对Pb2 ,Zn2 ,Cd2 的吸附效果均优于其对Cr(VI)的吸附效果;pH值是影响上述吸附的重要因素,离子交换和表面络合是上述吸附的主要形式. |
| 关键词: 膨润土,重金属,Pb2 ,Zn2 ,Cr(VI),Cd2 ,吸附作用 |
| DOI： |
| 分类号:O647.31 |
| 基金项目:国家自然科学基金资助项目(20277027) |
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| Adsorption Characteristics of Bentonite to Pb~(2+),Zn~(2+),Cr(VI),Cd~(2+) |
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SHI Hui-sheng
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| Abstract: |
| The actors of influence in using bentonite to adsorb Pb~(2 ),Zn~(2 ),Cr(VI),Cd~(2 ) were discussed.The adsorption was tested under laboratory conditions as a functions of pH,adsorption time and quantity of bentonite.The results of this research show that the adsorption capacity of bentonite to Pb~(2 ),Zn~(2 ),Cd~(2 ) is better than to Cr(VI) and the adsorption capacity strongly depends on pH.The research also indicates that the adsorption form may be mainly surface complex and ions exchange. |
| Key words: bentonite,heavy metal,Pb~(2 ),Zn~(2 ),Cr(VI),Cd~(2 ),adsorption |
