COMPARATIVE STUDY OF THE ADSORPTION CAPACITY OF PEAT HUMIC ACID (PHA) AND SOIL HUMIC ACID ON NANO-SiO2 AND NANO-KAOLIN
文献类型：期刊论文
| 作者 | Lu, Jiajuan ; Yan, Xiaomin ; Zhou, Yanmei ; Shi, Baoyou ; Ge, Xiaopeng ; Tang, Hongxiao |
| 刊名 | FRESENIUS ENVIRONMENTAL BULLETIN
 |
| 出版日期 | 2009 |
| 卷号 | 18期号:3页码:346-352 |
| 关键词 | Adsorption humic acids Nano-SiO2 Nano-kaolin |
| 中文摘要 | Adsorption of Peat humic acid (PHA) and soil humic acid by nano-SiO2 and nano-kaolin was comparatively studied. Two typical HAs were systematically characterized by using atomic force microscopy (AFM), elemental analysis and liquid-state (HNMR)-H-1 respectively. Adsorption experiments were performed in various concentrations of NaNO3 and at pH between 4 +/- 0.5 and 10 +/- 0.5. AFM images show the existence of small nanometer scale ring-shaped aggregates and sheet-like aggregates in soil HA and PHA, respectively. Elemental analysis indicates that soil HA presents higher aliphaticity, while PHA exhibits higher aromaticity. NMR spectra analysis shows that the soil HA has higher hydrophobic index (HB/HI). Adsorption data under various conditions are fit well by Freundlich models and the adsorption of HAs increases with increasing concentration of HAs. Adsorption of HAs on the two nanoparticles decreases with the increase of pH and decrease of ionic strength. Relative change of the adsorption with pH is more significant at low pH. It can be partly explained by the configuration changes of HA molecules with pH and ionic strength. Adsorption process of HA on nano-SiO2 and nano-kaolin can be explained via ligand exchange mechanism. Adsorption capacity is determined by the concentration of hydroxyl on nano-particles and the physiochemical properties of HAs. |
| WOS记录号 | WOS:000264461800015 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21649]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Lu, Jiajuan,Yan, Xiaomin,Zhou, Yanmei,et al. COMPARATIVE STUDY OF THE ADSORPTION CAPACITY OF PEAT HUMIC ACID (PHA) AND SOIL HUMIC ACID ON NANO-SiO2 AND NANO-KAOLIN[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2009,18(3):346-352. |
| APA | Lu, Jiajuan,Yan, Xiaomin,Zhou, Yanmei,Shi, Baoyou,Ge, Xiaopeng,&Tang, Hongxiao.(2009).COMPARATIVE STUDY OF THE ADSORPTION CAPACITY OF PEAT HUMIC ACID (PHA) AND SOIL HUMIC ACID ON NANO-SiO2 AND NANO-KAOLIN.FRESENIUS ENVIRONMENTAL BULLETIN,18(3),346-352. |
| MLA | Lu, Jiajuan,et al."COMPARATIVE STUDY OF THE ADSORPTION CAPACITY OF PEAT HUMIC ACID (PHA) AND SOIL HUMIC ACID ON NANO-SiO2 AND NANO-KAOLIN".FRESENIUS ENVIRONMENTAL BULLETIN 18.3(2009):346-352. |
入库方式： OAI收割
来源：生态环境研究中心
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