Removal of cu(ii) from aqueous solution by adsorption onto acid-activated palygorskite
文献类型：期刊论文
| 作者 | Chen, Hao; Zhao, Yaogang; Wang, Aiqin |
| 刊名 | Journal of hazardous materials
 |
| 出版日期 | 2007-10-22 |
| 卷号 | 149期号:2页码:346-354 |
| 关键词 | Palygorskite clay Acid-activation Adsorption Copper Kinetic Isotherm |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2007.03.085 |
| 通讯作者 | Wang, aiqin(aqwang@lzb.ac.cn) |
| 英文摘要 | A series of activated palygorskite clay by hcl with different concentrations was prepared and applied as adsorbents for removal of cu(ii) from aqueous solutions. the effects of contact time, adsorbent dosages and phs of suspension on the adsorption capacities for cu(ii) were investigated. the results showed that adsorption capacity of activated palygorskites increased with increasing the hcl concentration and the maximum adsorption capacity with 32.24 mg/g for cu(ii) is obtained at 12 mol/l of hcl concentration. the variations in ir spectra and ph of solution after adsorption cu(ii) confirmed that the numerous amount of silanol groups (si-oh) originated by acid treatment were mainly responsible for cu(ii) adsorption onto acid-activated palygorskite. kinetic studies indicated that the adsorption mechanisms in the cu(ii)/acid-activated palygorskite system followed the pseudo-second-order kinetic model with a relatively small contribution of film diffusion. equilibrium data fitted well with freundlich isotherm model compared to langmuir isotherm model, indicating that adsorption takes place on heterogeneous surfaces of the acid-activated palygorskite. adsorption-desorption studies presented that activated palygorskite has lower adsorption and desorption efficiencies using cu(ch3coo)(2) than that of other inorganic copper salts, such as cuso4, cu(no3)(2), and cucl2. (c) 2007 elsevier b.v. all rights reserved. |
| WOS关键词 | HEAVY-METALS ; COPPER ; SEPIOLITE ; SORPTION ; MONTMORILLONITE ; KINETICS ; CLAY ; ATTAPULGITE ; RETENTION ; EXCHANGE |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000250640600013 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2381070 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, Aiqin |
| 作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Ctr Ecomat & Green Chem, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Hao,Zhao, Yaogang,Wang, Aiqin. Removal of cu(ii) from aqueous solution by adsorption onto acid-activated palygorskite[J]. Journal of hazardous materials,2007,149(2):346-354. |
| APA | Chen, Hao,Zhao, Yaogang,&Wang, Aiqin.(2007).Removal of cu(ii) from aqueous solution by adsorption onto acid-activated palygorskite.Journal of hazardous materials,149(2),346-354. |
| MLA | Chen, Hao,et al."Removal of cu(ii) from aqueous solution by adsorption onto acid-activated palygorskite".Journal of hazardous materials 149.2(2007):346-354. |
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来源：中国科学院大学
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