Removal of Lead and Cadmium Ions from Aqueous Solution by Polyvinyl alcohol-modified Kaolinite Clay: A Novel Nano-clay Adsorbent
文献类型：期刊论文
| 作者 | Unuabonah, E. I.1; Olu-Owolabi, B. I.2; Adebowale, K. O.2; Yang, L. Z.3 |
| 刊名 | ADSORPTION SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2008 |
| 卷号 | 26期号:6页码:383-405 |
| ISSN号 | 0263-6174 |
| 通讯作者 | Unuabonah, E. I.(iyaemma@yahoo.com) |
| 英文摘要 | Kaolinite clay was modified with polyvinyl alcohol (PVA) to obtain a PVA-nano-clay adsorbent. X-Ray diffraction Measurements Of the adsorbent showed no observable change in the d-spacing of its crystal lattice. Scanning electron microscopy of the PVA-modified nano-clay adsorbent indicated the presence of irregular crystal structures. Infrared spectroscopy suggested that the PVA-nano-clay adsorbent basically possessed Outer -OH functional groups. This adsorbent was found to have an adsorption capacity of 56.18 mg/g for Pb(2+) ions and 41.67 mg/g for Cd(2+) ions. The adsorption data obtained was well explained by the Diffuse Layer Model (DLM), which implies that the adsorption of both metal ions onto the modified adsorbent was via an inner-sphere surface complexation mechanism. The Delta H(0) values for adsorption of both metal ions onto the PVA-nano-clay were -12.48 kJ/mol for Pb(2+) ions and -13.49 kJ/mol for Cd(2+) ions, with both ions exhibiting negative adsorption entropies. data-fitting indicated that both the PVA-nano-clay and the unmodified adsorbent possessed homogeneous and heterogeneous adsorption sites. Virtually complete desorption (ca. 99%) of both metal ions occurred front PVA-nano-clay within 3 min. |
| 收录类别 | SCI |
| WOS关键词 | ADSORPTION BEHAVIOR ; ORDERED KAOLINITE ; SORPTION ; SURFACE ; THERMODYNAMICS ; TRANSITION ; BENTONITE ; ALUMINUM ; EXCHANGE ; CALCIUM |
| WOS研究方向 | Chemistry ; Engineering |
| WOS类目 | Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical |
| 语种 | 英语 |
| WOS记录号 | WOS:000264408500001 |
| 出版者 | MULTI SCIENCE PUBL CO LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558735 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Unuabonah, E. I. |
| 作者单位 | 1.Fed Univ Petr Resources, Coll Sci, Dept Pure & Ind Chem, Effurun, Nigeria 2.Univ Ibadan, Fac Sci, Dept Chem, Ibadan, Nigeria 3.Acad Sinica, Inst Soil Sci, Nanjing, Jiangsu Prov, Peoples R China |
| 推荐引用方式 GB/T 7714 | Unuabonah, E. I.,Olu-Owolabi, B. I.,Adebowale, K. O.,et al. Removal of Lead and Cadmium Ions from Aqueous Solution by Polyvinyl alcohol-modified Kaolinite Clay: A Novel Nano-clay Adsorbent[J]. ADSORPTION SCIENCE & TECHNOLOGY,2008,26(6):383-405. |
| APA | Unuabonah, E. I.,Olu-Owolabi, B. I.,Adebowale, K. O.,&Yang, L. Z..(2008).Removal of Lead and Cadmium Ions from Aqueous Solution by Polyvinyl alcohol-modified Kaolinite Clay: A Novel Nano-clay Adsorbent.ADSORPTION SCIENCE & TECHNOLOGY,26(6),383-405. |
| MLA | Unuabonah, E. I.,et al."Removal of Lead and Cadmium Ions from Aqueous Solution by Polyvinyl alcohol-modified Kaolinite Clay: A Novel Nano-clay Adsorbent".ADSORPTION SCIENCE & TECHNOLOGY 26.6(2008):383-405. |
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来源：南京土壤研究所
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