Mechanisms and factors affecting the adsorption of sodium alginate onto modified clays
文献类型：CNKI期刊论文
| 作者 | Lin YX(林勇新); Cao XH(曹西华) ; Song XX(宋秀贤); Wang N(王楠); Yu ZM(俞志明)
|
| 发表日期 | 2013-07-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | modified clays sodium alginate adsorption kinetics adsorption isotherms pH 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Science Foundation of China for Young Scholars(No.40906055) ; the National Natural Science Foundation of China for Creative Research Groups(No.41121064) ; the National Basic Research Programof China (973 Program) (No.2010CB428706) |
| 卷 | v.31期:04页:171-179 |
| 语种 | 英文; |
| 分类号 | X703 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190796]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.KeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | Lin YX,Cao XH,Song XX,et al. Mechanisms and factors affecting the adsorption of sodium alginate onto modified clays. 2013. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。