Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents
Composite adsorbents, Ca(ALG) 2 –Cu 2 O, Ca(ALG) 2 –AgCl and Ca(ALG) 2 –Ag, were prepared using Cu 2 O, AgCl and Ag as the adsorption-active components and calcium alginate as the matrix material. The adsorption of iodide from aqueous solutions onto these adsorbents was investigated as a function of...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2012-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.5.449 |
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| author | Huifang Zhang Tan Guo Quan Li Haining Liu Xiushen Ye Zhijian Wu |
| author_facet | Huifang Zhang Tan Guo Quan Li Haining Liu Xiushen Ye Zhijian Wu |
| author_sort | Huifang Zhang |
| collection | DOAJ |
| description | Composite adsorbents, Ca(ALG) 2 –Cu 2 O, Ca(ALG) 2 –AgCl and Ca(ALG) 2 –Ag, were prepared using Cu 2 O, AgCl and Ag as the adsorption-active components and calcium alginate as the matrix material. The adsorption of iodide from aqueous solutions onto these adsorbents was investigated as a function of initial solution pH, temperature and co-existing NaCl. The loading of the adsorption-active components in the composite adsorbents is much higher than that in the reported composite adsorbents. In neutral solutions, the equilibrium adsorption amount follows the order of Ca(ALG) 2 –AgCl <> Ca(ALG) 2 –Ag >> Ca(ALG) 2 –Cu 2 O. The adsorption by Ca(ALG) 2 –AgCl is insensitive to pH, while the adsorption by Ca(ALG) 2 –Cu 2 O and Ca(ALG) 2 –Ag is pH dependent. The effect of temperature on the adsorption is more pronounced for Ca(ALG) 2 –Cu 2 O than for Ca(ALG) 2 –AgCl and Ca(ALG) 2 –Ag. The co-existing NaCl does not affect the adsorption by Ca(ALG) 2 –AgCl very much; however, it suppresses the adsorption by Ca(ALG) 2 –Ag, and especially, Ca(ALG) 2 –Cu 2 O. Chemical adsorption is the main mechanism for all the three adsorbents. Ca(ALG) 2 –AgCl was found to be the best adsorbent owing to its highest adsorption capacity, suitable adsorption rate and insensitivity to solution pH, temperature and co-existing NaCl. |
| format | Article |
| id | doaj-art-2d4abd0f61404fd8930dc3da4c4c1467 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2012-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-2d4abd0f61404fd8930dc3da4c4c14672025-01-03T00:11:56ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382012-05-013010.1260/0263-6174.30.5.449Iodide Adsorption onto Three Organic–Inorganic Composite AdsorbentsHuifang Zhang0Tan Guo1Quan Li2Haining Liu3Xiushen Ye4Zhijian Wu5 The Graduate University of Chinese Academy of Sciences, Beijing 100049, China The Graduate University of Chinese Academy of Sciences, Beijing 100049, China Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, ChinaComposite adsorbents, Ca(ALG) 2 –Cu 2 O, Ca(ALG) 2 –AgCl and Ca(ALG) 2 –Ag, were prepared using Cu 2 O, AgCl and Ag as the adsorption-active components and calcium alginate as the matrix material. The adsorption of iodide from aqueous solutions onto these adsorbents was investigated as a function of initial solution pH, temperature and co-existing NaCl. The loading of the adsorption-active components in the composite adsorbents is much higher than that in the reported composite adsorbents. In neutral solutions, the equilibrium adsorption amount follows the order of Ca(ALG) 2 –AgCl <> Ca(ALG) 2 –Ag >> Ca(ALG) 2 –Cu 2 O. The adsorption by Ca(ALG) 2 –AgCl is insensitive to pH, while the adsorption by Ca(ALG) 2 –Cu 2 O and Ca(ALG) 2 –Ag is pH dependent. The effect of temperature on the adsorption is more pronounced for Ca(ALG) 2 –Cu 2 O than for Ca(ALG) 2 –AgCl and Ca(ALG) 2 –Ag. The co-existing NaCl does not affect the adsorption by Ca(ALG) 2 –AgCl very much; however, it suppresses the adsorption by Ca(ALG) 2 –Ag, and especially, Ca(ALG) 2 –Cu 2 O. Chemical adsorption is the main mechanism for all the three adsorbents. Ca(ALG) 2 –AgCl was found to be the best adsorbent owing to its highest adsorption capacity, suitable adsorption rate and insensitivity to solution pH, temperature and co-existing NaCl.https://doi.org/10.1260/0263-6174.30.5.449 |
| spellingShingle | Huifang Zhang Tan Guo Quan Li Haining Liu Xiushen Ye Zhijian Wu Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents Adsorption Science & Technology |
| title | Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents |
| title_full | Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents |
| title_fullStr | Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents |
| title_full_unstemmed | Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents |
| title_short | Iodide Adsorption onto Three Organic–Inorganic Composite Adsorbents |
| title_sort | iodide adsorption onto three organic inorganic composite adsorbents |
| url | https://doi.org/10.1260/0263-6174.30.5.449 |
| work_keys_str_mv | AT huifangzhang iodideadsorptionontothreeorganicinorganiccompositeadsorbents AT tanguo iodideadsorptionontothreeorganicinorganiccompositeadsorbents AT quanli iodideadsorptionontothreeorganicinorganiccompositeadsorbents AT hainingliu iodideadsorptionontothreeorganicinorganiccompositeadsorbents AT xiushenye iodideadsorptionontothreeorganicinorganiccompositeadsorbents AT zhijianwu iodideadsorptionontothreeorganicinorganiccompositeadsorbents |