Mechanisms and factors affecting the adsorption of sodium alginate onto modified clays
文献类型：期刊论文
| 作者 | Lin Yongxin1,2; Cao Xihua1 ; Song Xiuxian1; Wang Nan1,2; Yu Zhiming1; Cao, XH
|
| 刊名 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| 出版日期 | 2013-07-01 |
| 卷号 | 31期号:4页码:867-875 |
| 关键词 | modified clays sodium alginate adsorption kinetics adsorption isotherms pH ionic strength |
| ISSN号 | 0254-4059 |
| 通讯作者 | Cao, XH |
| 中文摘要 | Algal organic materials (AOMs) are one critical factor affecting the efficiency of modified clays used for the mitigation of harmful algal blooms (HABs). This study was conducted to develop a deeper understanding of the mechanisms and factors affecting the adsorption of AOMs onto modified clays. Sodium alginate (polysaccharide) and kaolinite modified with polyaluminium chloride (PACl) were used as AOMs and modified clay model substances, respectively, and the effects of modifier dosage, contact time, solution pH and ionic strength were investigated through batch adsorption experiments. Kinetics revealed that the alginate adsorption rate was described well by a pseudo-second order model. PACl effectively enhanced the adsorption capacity of kaolinite and increased the adsorption rate, and the optimum additive amount of PACl was 5%. The experimental data fitted both the Freundlich and Langmuir adsorption equations well. The adsorption thermodynamics for alginate onto modified clays suggests that alginate adsorption is a spontaneous process. The adsorption of alginate onto modified clays was highly dependent on pH, with a decrease in adsorption observed with increased pH to 9.48, but the opposite was true above pH 9.48. Finally, adsorption increased with increasing ionic strength. |
| 英文摘要 | Algal organic materials (AOMs) are one critical factor affecting the efficiency of modified clays used for the mitigation of harmful algal blooms (HABs). This study was conducted to develop a deeper understanding of the mechanisms and factors affecting the adsorption of AOMs onto modified clays. Sodium alginate (polysaccharide) and kaolinite modified with polyaluminium chloride (PACl) were used as AOMs and modified clay model substances, respectively, and the effects of modifier dosage, contact time, solution pH and ionic strength were investigated through batch adsorption experiments. Kinetics revealed that the alginate adsorption rate was described well by a pseudo-second order model. PACl effectively enhanced the adsorption capacity of kaolinite and increased the adsorption rate, and the optimum additive amount of PACl was 5%. The experimental data fitted both the Freundlich and Langmuir adsorption equations well. The adsorption thermodynamics for alginate onto modified clays suggests that alginate adsorption is a spontaneous process. The adsorption of alginate onto modified clays was highly dependent on pH, with a decrease in adsorption observed with increased pH to 9.48, but the opposite was true above pH 9.48. Finally, adsorption increased with increasing ionic strength. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 学科主题 | Marine & Freshwater Biology ; Oceanography |
| 类目[WOS] | Limnology ; Oceanography |
| 研究领域[WOS] | Marine & Freshwater Biology ; Oceanography |
| 关键词[WOS] | NATURAL ORGANIC-MATTER ; POLYALUMINUM CHLORIDES ; ELECTROSTATIC PATCH ; ACTIVATED ALUMINA ; AQUEOUS-SOLUTION ; AQUATIC SYSTEMS ; EXOPOLYMERS EPS ; COAGULATION ; KAOLINITE ; KINETICS |
| 收录类别 | SCI |
| 原文出处 | 10.1007/s00343-013-2226-8 |
| 语种 | 英语 |
| WOS记录号 | WOS:000321629400019 |
| 公开日期 | 2014-07-17 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/16481]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 通讯作者 | Cao, XH |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin Yongxin,Cao Xihua,Song Xiuxian,et al. Mechanisms and factors affecting the adsorption of sodium alginate onto modified clays[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2013,31(4):867-875. |
| APA | Lin Yongxin,Cao Xihua,Song Xiuxian,Wang Nan,Yu Zhiming,&Cao, XH.(2013).Mechanisms and factors affecting the adsorption of sodium alginate onto modified clays.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,31(4),867-875. |
| MLA | Lin Yongxin,et al."Mechanisms and factors affecting the adsorption of sodium alginate onto modified clays".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 31.4(2013):867-875. |
入库方式： OAI收割
来源：海洋研究所
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