Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb
文献类型：期刊论文
| 作者 | Xiong, Juan1; Weng, Liping2; Koopal, Luuk K.1,3; Wang, Mingxia1; Shi, Zhihua1; Zheng, Lirong4; Tan, Wenfeng1 |
| 刊名 | Environmental science & technology
 |
| 出版日期 | 2018-02-06 |
| 卷号 | 52期号:3页码:1348-1356 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/acs.est.7b05412 |
| 通讯作者 | Tan, wenfeng(wenfeng.tan@hotmail.com) |
| 英文摘要 | The effect of adsorbed soil fulvic (jgfa) and humic acid (jgha) on pb binding to goethite was studied with the ligand charge distribution (lcd) model and x-ray absorption fine structure (xafs) spectroscopy analysis. in the lcd model, the adsorbed small jgfa particles were evenly located in the stern layer, but the large jgha particles were distributed over the stern layer and the diffuse layer, which mainly depended on the jgha diameter and concentrations. specific interactions of humic substances (hs) with goethite were modeled by inner-sphere complexes between the -feoh20.5+ of goethite and the -coo- of hs and by pb bridges between surface sites and coo- groups of hs. at low pb levels, nearly 100% of pb was bound as pb bridges for both jgfa and jgha. at high pb levels and low hs loading, pb-goethite almost dominated over the entire studied ph range, but at high hs loading, the primary species was goethite-hs-pb at acidic ph and goethite-pb at alkaline ph. compared with jgfa, there was a constant contribution of pb bridges of about 10% for jgha. the linear combination fit of exafs, using pb-hs and pb-goethite as references, indicated that with increased hs loading more pb was bound to adsorbed hs and less to goethite, which supported the lcd calculations. |
| WOS关键词 | NATURAL ORGANIC-MATTER ; METAL-ION BINDING ; WATER INTERFACE ; SURFACE COMPLEXATION ; LEAD BINDING ; IRON-OXIDES ; GOETHITE ; ADSORPTION ; SUBSTANCES ; COPPER |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000424851700047 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178023 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Tan, Wenfeng |
| 作者单位 | 1.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China 2.Wageningen Univ, Dept Soil Qual, POB 8005, NL-6700 EC Wageningen, Netherlands 3.Wageningen Univ & Res, Phys Chem & Soft Matter, POB 8038, NL-6703 HB Wageningen, Netherlands 4.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiong, Juan,Weng, Liping,Koopal, Luuk K.,et al. Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb[J]. Environmental science & technology,2018,52(3):1348-1356. |
| APA | Xiong, Juan.,Weng, Liping.,Koopal, Luuk K..,Wang, Mingxia.,Shi, Zhihua.,...&Tan, Wenfeng.(2018).Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb.Environmental science & technology,52(3),1348-1356. |
| MLA | Xiong, Juan,et al."Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb".Environmental science & technology 52.3(2018):1348-1356. |
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