Competitive and synergistic effects of phosphate and cadmium coadsorbed on goethite
文献类型：期刊论文
| 作者 | Tao, Liang3,4; Chen, Wenjie4; Liu, Yuxin4; Yang, Feng4; Liu, Dong2 ; Liang, Junfen3; Liu, Saihong1; Li, Hui5
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| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2023 |
| 卷号 | 324页码:138171 |
| 关键词 | ADSORPTION SURFACE COADSORPTION LEAD CD CONTAMINATION EXPOSURE CD(II) FE(II) COPPER |
| ISSN号 | 0045-6535 |
| DOI | 10.1016/j.chemosphere.2023.138171 |
| 英文摘要 | Soil acidification in southern China increases the environmental risk posed by heavy metals, especially cadmium (Cd), and has been accelerated by anthropic activities. Long-term fertilizer use increases the quantity of phosphate (P) in soils, which affects the biogeochemistry of heavy metals in soil environments. In this study, various analytical methods were used to investigate the critical mechanisms controlling P(V)–Cd(II) interactions with goethite (α-FeOOH, a typical iron oxide widely distributed in red soil areas) with added P(V)/Cd(II) in different molar ratios (to simulate the annual P fertilizer surplus). After excluding pH interference by using organic buffers, Cd(II) adsorption processes on α-FeOOH were found to be enhanced by the presence of P(V), whereas the Cd(II) adsorption type changed from single inner-sphere complexation to both inner- and outer-sphere complexation. The results of a zeta potential analysis, X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) showed different dominant mechanisms underlying the promotion of Cd(II) adsorption by P(V) at different P(V)/Cd(II) molar ratios. Electrostatic adsorption and the formation of ternary complexes were proven to be the critical mechanisms controlling the reactivity of Cd(II), where coprecipitation occurs at high P(V)/Cd(II) molar ratios and considerably enhances the fixation of Cd(II) and P(V). The mechanism for Cd(II) and P(V) coadsorption onto α-FeOOH under stable pH conditions was found to include both competitive and synergistic effects, and the results in this study show that more attention should be given to the impact of anthropic activities on the reactivity of heavy metals in the soil environment, especially farmland. ? 2023 Elsevier Ltd |
| WOS研究方向 | Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000961917500001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80255]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 作者单位 | 1.Huangpu Technology Center of Guangzhou Municipal Ecological Environment Bureau, Guangzhou; 510530, China 2.Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences/ CAS Center for Excellence in Deep Earth Science, Guangzhou; 510640, China 3.Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Economics and Information, Guangdong Academy of Agricultural Sciences, Guangzhou; 510640, China 4.National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou; 510650, China 5.School of Computer Science, South China Normal University, Guangzhou; 510631, China |
| 推荐引用方式 GB/T 7714 | Tao, Liang,Chen, Wenjie,Liu, Yuxin,et al. Competitive and synergistic effects of phosphate and cadmium coadsorbed on goethite[J]. CHEMOSPHERE,2023,324:138171. |
| APA | Tao, Liang.,Chen, Wenjie.,Liu, Yuxin.,Yang, Feng.,Liu, Dong.,...&Li, Hui.(2023).Competitive and synergistic effects of phosphate and cadmium coadsorbed on goethite.CHEMOSPHERE,324,138171. |
| MLA | Tao, Liang,et al."Competitive and synergistic effects of phosphate and cadmium coadsorbed on goethite".CHEMOSPHERE 324(2023):138171. |
入库方式： OAI收割
来源：广州地球化学研究所
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