Molecular binding mechanisms of manganese to the root cell wall of Phytolacca americana L. using multiple spectroscopic techniques
文献类型：期刊论文
| 作者 | Xu, Xianghua1,2; Yang, Jianjun3; Zhao, Xiaoyan1; Zhang, Xuesong1; Li, Renying1 |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2015-10-15 |
| 卷号 | 296页码:185-191 |
| 关键词 | Mn Phytolacca americana L. Root cell wall XANES EXAFS FTIR |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2015.04.054 |
| 通讯作者 | Yang, Jianjun(yangjianjun@zju.edu.cn) |
| 英文摘要 | The root cell wall (ROW) of Mn hyperaccumulator Phytolacca americana L. (P. americana) plays an important role in immobilizing and detoxifying excessive Mn, but the molecular binding mechanism of Mn to RCW has been little studied. This study investigated the effect of varied pH on Mn adsorption by the isolated RCW from P. americana in batch experiments, and explored the binding mechanisms of Mn to RCW using Fourier transform infrared spectroscopy (FTIR), synchrotron-based X-ray absorption near-edge structure (XANES), and extended X-ray fine structure spectroscopy (EXAFS). Results showed that Mn binding capacity depends on solution pH, with an optimal pH of 5.0-6.0. Experimental isotherm data could be successfully modeled by the Langmuir and Freundlich equations; the estimated maximum Mn adsorption capacity was 5.446 mg g(-1) according to the established Langmuir isotherm. FTIR spectroscopy demonstrated hydroxyl and carboxyl groups were probably involved in the Mn binding process. XANES results showed that Mn remained as Mn(II) after adsorption on RCW, without any change of oxidation state; EXAFS analysis further revealed that Mn was complexed to RCW via bidentate inner-sphere coordination with carboxyl, which provides new structure information of Mn adsorbed on biomaterials and accounted for high Mn accumulation on ROW of P. americana. (C) 2015 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | RAY-ABSORPTION SPECTROSCOPY ; ACINOSA ROXB. PHYTOLACCACEAE ; AQUEOUS-SOLUTIONS ; REMOVAL ; WASTE ; ADSORPTION ; COPPER ; PLANT ; MN ; ACCUMULATION |
| 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:000356995500022 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558372 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Yang, Jianjun |
| 作者单位 | 1.Nanjing Univ Informat Sci &Technol, Jiangsu Key Lab Agr Meteorol, Nanjing 210044, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 3.Zhejiang Univ, Dept Environm Engn, Coll Environm & Resource Sci, Hangzhou 310058, Zhejiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Xianghua,Yang, Jianjun,Zhao, Xiaoyan,et al. Molecular binding mechanisms of manganese to the root cell wall of Phytolacca americana L. using multiple spectroscopic techniques[J]. JOURNAL OF HAZARDOUS MATERIALS,2015,296:185-191. |
| APA | Xu, Xianghua,Yang, Jianjun,Zhao, Xiaoyan,Zhang, Xuesong,&Li, Renying.(2015).Molecular binding mechanisms of manganese to the root cell wall of Phytolacca americana L. using multiple spectroscopic techniques.JOURNAL OF HAZARDOUS MATERIALS,296,185-191. |
| MLA | Xu, Xianghua,et al."Molecular binding mechanisms of manganese to the root cell wall of Phytolacca americana L. using multiple spectroscopic techniques".JOURNAL OF HAZARDOUS MATERIALS 296(2015):185-191. |
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来源：南京土壤研究所
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