Comparison of sorption of Pb(2+) and Cd(2+) on Kaolinite clay and polyvinyl alcohol-modified Kaolinite clay
文献类型：期刊论文
| 作者 | Unuabonah, E. I.1; Adebowale, K. O.2; Olu-Owolabi, B. I.2; Yang, L. Z.3 |
| 刊名 | ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
 |
| 出版日期 | 2008-12-01 |
| 卷号 | 14期号:6页码:791-803 |
| 关键词 | Adsorption Desorption Kaolinite Kinetic Model Modified adsorbent |
| ISSN号 | 0929-5607 |
| DOI | 10.1007/s10450-008-9142-9 |
| 通讯作者 | Unuabonah, E. I.(iyaemma@yahoo.com) |
| 英文摘要 | Kaolinite clay obtained from Ubulu-Ukwu, Delta state in Nigeria was modified with polyvinyl alcohol (PVA) reagent to obtain PVA-modified Kaolinite clay adsorbent. Scanning Electron Microscopy (SEM) of the PVA-modified adsorbent suggests that Kaolinite clay particles were made more compact in nature with no definite structure. Modification of Kaolinite clay with PVA increased its adsorption capacity for 300 mg/L Pb(2+) and Cd(2+) by a factor of at least 6, i.e., from 4.5 mg/g to 36.23 mg/g and from 4.38 mg/g to 29.85 mg/g, respectively, at 298 K. Binary mixtures of Pb(2+) and Cd(2+) decreased the adsorption capacity of Unmodified Kaolinite clay for Pb(2+) by 26.3% and for Cd(2+) by 0.07%, respectively. In contrast, for PVA-modified Kaolinite clay, the reductions were up to 50.9% and 58.5% for Pb(2+) and Cd(2+), respectively. The adsorption data of Pb(2+) and Cd(2+) onto both Unmodified and PVA-modified Kaolinite clay adsorbents were found to fit the Pseudo-Second Order Kinetic model (PSOM), indicating that adsorption on both surfaces was mainly by chemisorption and is concentration dependent. However, kinetic adsorption data from both adsorbent generally failed the Pseudo-First order Kinetic model (PFOM) test. Extents of desorption of 91% Pb(2+) and 94% Cd(2+) were obtained, using 0.1 M HCl, for the Unmodified Kaolinite clay adsorbent. It was found that 99% Pb(2+) and 97% Cd(2+), were desorbed, for PVA-modified Kaolinite clay adsorbents within 3 min for 60 mg/L of the metal ions adsorbed by the adsorbents. |
| 收录类别 | SCI |
| WOS关键词 | ADSORPTION ; KINETICS ; REMOVAL ; PEAT ; LEAD ; EQUILIBRIUM ; EFFLUENTS ; METALS ; IONS |
| WOS研究方向 | Chemistry ; Engineering |
| WOS类目 | Chemistry, Physical ; Engineering, Chemical |
| 语种 | 英语 |
| WOS记录号 | WOS:000260549700005 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558738 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Unuabonah, E. I. |
| 作者单位 | 1.Bells Univ Technol, Dept Chem Sci, Coll Nat & Appl Sci, Ota, Nigeria 2.Univ Ibadan, Dept Chem, Fac Sci, Ibadan, Nigeria 3.CAS, Inst Soil Sci, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Unuabonah, E. I.,Adebowale, K. O.,Olu-Owolabi, B. I.,et al. Comparison of sorption of Pb(2+) and Cd(2+) on Kaolinite clay and polyvinyl alcohol-modified Kaolinite clay[J]. ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY,2008,14(6):791-803. |
| APA | Unuabonah, E. I.,Adebowale, K. O.,Olu-Owolabi, B. I.,&Yang, L. Z..(2008).Comparison of sorption of Pb(2+) and Cd(2+) on Kaolinite clay and polyvinyl alcohol-modified Kaolinite clay.ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY,14(6),791-803. |
| MLA | Unuabonah, E. I.,et al."Comparison of sorption of Pb(2+) and Cd(2+) on Kaolinite clay and polyvinyl alcohol-modified Kaolinite clay".ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY 14.6(2008):791-803. |
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来源：南京土壤研究所
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