Institutional Repository of Chinese Acad Sci, Inst Solid State Phys， Hefei 230031, Anhui, Peoples R China
| Screening hydroxyapatite for cadmium and lead immobilization in aqueous solution and contaminated soil: The role of surface area | |
| Li, Hongying1; Guo, Xisheng1; Ye, Xinxin1,2 | |
| 2017-02-01 | |
| 发表期刊 | JOURNAL OF ENVIRONMENTAL SCIENCES
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| 摘要 | Hydroxyapatite (HAP) has been widely used to immobilize many cationic metals in water and soils. The specific reason why an increase in the surface area of HAP enhances cadmium (Cd) uptake, but has no effect on lead (Pb) uptake, is not clear. The aim of this study was to determine the factors causing the differences in sorption behavior between Cd and Pb by evaluating HAPs with different surface areas. We synthesized HAPs with two different surface areas, which were characterized by X-ray diffraction, N-2 adsorption, and scanning electron microscopy, and then evaluated them as sorbents for Cd and Pb removal by testing in single and binary systems. The sorption capacity of large surface area HAP (1.85 mmol/g) for Cd in the single-metal system was higher than that of small surface area HAP (0.64 mmol/g), but there were no differences between single-and binary-metal solutions containing Pb. After the Cd experiments, the HAP retained a stable structure and intact morphology, which promotes the accessibility of reactive sites for Cd. However, a newly formed precipitate covered the surface and blocked the channels in the presence of Pb, which reduced the number of potential adsorption sites on HAP for Cd and Pb. Remediation experiments using Cd-and Pb-contaminated soil produced similar results to the solution tests. These results indicate that alterations of the structure and morphology during the reaction is an important factor influencing metal sorption to HAP. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 文章类型 | Article |
| 关键词 | Hydroxyapatite Cadmium Lead Remediation Structure And Morphology |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| DOI | 10.1016/j.jes.2016.04.005 |
| 关键词[WOS] | SYNTHETIC HYDROXYAPATITE ; SEQUENTIAL EXTRACTION ; PADDY SOILS ; SORPTION ; IONS ; REMOVAL ; METAL ; ADSORPTION ; SEDIMENTS ; SINGLE |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | National Natural Science Foundation of China(41301347) ; National Natural Science Foundation of China(41301347) ; National Natural Science Foundation of China(41301347) ; National Natural Science Foundation of China(41301347) ; Anhui Provincial Natural Science Foundation(1408085MKL61) ; Anhui Provincial Natural Science Foundation(1408085MKL61) ; Anhui Provincial Natural Science Foundation(1408085MKL61) ; Anhui Provincial Natural Science Foundation(1408085MKL61) ; Scientific and Technical Key Research Program of Auhui(1501031088) ; Scientific and Technical Key Research Program of Auhui(1501031088) ; Scientific and Technical Key Research Program of Auhui(1501031088) ; Scientific and Technical Key Research Program of Auhui(1501031088) ; Natural Science Foundation of Anhui Academy of Agricultural Sciences(16A1029) ; Natural Science Foundation of Anhui Academy of Agricultural Sciences(16A1029) ; Natural Science Foundation of Anhui Academy of Agricultural Sciences(16A1029) ; Natural Science Foundation of Anhui Academy of Agricultural Sciences(16A1029) |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:000394947500016 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/31766 |
| 专题 | 中科院固体物理研究所 |
| 作者单位 | 1.Anhui Acad Agr Sci, Inst Soil & Fertilizer, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Key Lab Mat Phys,Ctr Environm & Energy Nanomat, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hongying,Guo, Xisheng,Ye, Xinxin. Screening hydroxyapatite for cadmium and lead immobilization in aqueous solution and contaminated soil: The role of surface area[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2017,52(无):141-150. |
| APA | Li, Hongying,Guo, Xisheng,&Ye, Xinxin.(2017).Screening hydroxyapatite for cadmium and lead immobilization in aqueous solution and contaminated soil: The role of surface area.JOURNAL OF ENVIRONMENTAL SCIENCES,52(无),141-150. |
| MLA | Li, Hongying,et al."Screening hydroxyapatite for cadmium and lead immobilization in aqueous solution and contaminated soil: The role of surface area".JOURNAL OF ENVIRONMENTAL SCIENCES 52.无(2017):141-150. |
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