Phosphorus-modified metakaolin as a soil amendment for immobilizing REEs and reducing their bioaccumulation
文献类型：期刊论文
| 作者 | Long, Shiqin1,2,3; Xiang, Jiangxin1,2,3; Li, Hongbo1,2; Wei, Shoushu1,2,3; Chen, Qingze1,2,3; Zhu, Runliang1,2,3
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| 刊名 | APPLIED CLAY SCIENCE
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 251页码:10 |
| 关键词 | Soil amendment Clay mineral Phosphorous modification Immobilization Rare earth elements |
| ISSN号 | 0169-1317 |
| DOI | 10.1016/j.clay.2024.107304 |
| 英文摘要 | Rare earth elements (REEs) as emerging soil contaminants have attracted increasing concerns. Efficient, economical, and eco-friendly soil amendments for REEs-contaminated farmland in-situ remediation are exigently needed. Herein, phosphorus-modified metakaolin (MK-P) was synthesized as a soil amendment to immobilize REEs in soil and reduce their bioaccumulation in water spinach (Ipomoea aquatica Forssk.). MK-P was developed by the combination of mechanochemical and thermal treatments using metakaolin and KH2PO4 as raw materials. Our results indicated that the aluminum potassium phosphate and active Al-O-P sites were generated within MK-P, facilitating the immobilization of REEs and the controlled release of phosphorus. The application of 3% MK-P significantly reduced the content of available REEs in soil by 76.7%-99.2% and reduced the REE contents in the shoots (edible parts) of water spinach by 43.0%-57.3%. Correlation analysis suggested that the enhancement for REE immobilization using MK-P could be ascribed to the increase of soil pH and available P. Furthermore, the application of MK-P led to the amelioration of soil fertility, which subsequently increased plant yield by 14.8%-20.1% under MK-P treatment. These findings suggest that MK-P can be used as a promising soil amendment to minimize REE bioavailability in REEs-contaminated soil and improve soil quality. |
| WOS研究方向 | Chemistry ; Materials Science ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001202361200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77084]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Chen, Qingze |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Long, Shiqin,Xiang, Jiangxin,Li, Hongbo,et al. Phosphorus-modified metakaolin as a soil amendment for immobilizing REEs and reducing their bioaccumulation[J]. APPLIED CLAY SCIENCE,2024,251:10. |
| APA | Long, Shiqin,Xiang, Jiangxin,Li, Hongbo,Wei, Shoushu,Chen, Qingze,&Zhu, Runliang.(2024).Phosphorus-modified metakaolin as a soil amendment for immobilizing REEs and reducing their bioaccumulation.APPLIED CLAY SCIENCE,251,10. |
| MLA | Long, Shiqin,et al."Phosphorus-modified metakaolin as a soil amendment for immobilizing REEs and reducing their bioaccumulation".APPLIED CLAY SCIENCE 251(2024):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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