Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate
The formation of As(V) substituted hydroxylapatite (HAP) has a vital influence on the fate of As(V) in the environment. However, despite growing evidence showing that HAP crystallizes in vivo and in vitro with amorphous calcium phosphate (ACP) as a precursor, a knowledge gap exists concerning the tr...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/170043 |
| _version_ | 1826121506679160832 |
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| author | Yan, Yao Fang, Yanan Verma, Vivek Li, Jun Wang, Yong Yang, Yongqiang Chen, Fanrong Zhu, Runliang Wu, Shijun Hooper, Thomas J. N. White, Timothy John |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Yan, Yao Fang, Yanan Verma, Vivek Li, Jun Wang, Yong Yang, Yongqiang Chen, Fanrong Zhu, Runliang Wu, Shijun Hooper, Thomas J. N. White, Timothy John |
| author_sort | Yan, Yao |
| collection | NTU |
| description | The formation of As(V) substituted hydroxylapatite (HAP) has a vital influence on the fate of As(V) in the environment. However, despite growing evidence showing that HAP crystallizes in vivo and in vitro with amorphous calcium phosphate (ACP) as a precursor, a knowledge gap exists concerning the transformation from arsenate-bearing ACP (AsACP) to arsenate-bearing HAP (AsHAP). Here we synthesized AsACP nano-particles with varied As contents and investigated the arsenic incorporation during their phase evolution. The phase evolution results showed that the transformation process of AsACP to AsHAP could be divided into three Stages. A higher As(V) loading significantly delayed the transformation of AsACP, increased the distortion degree, and decreased the crystallinity of AsHAP. NMR result showed that the PO43- tetrahedral is geometrically preserved when PO43- is substituted by AsO43-. From AsACP to AsHAP, the As-substitution led to the transformation inhibition and As(V) immobilization. |
| first_indexed | 2024-10-01T05:33:41Z |
| format | Journal Article |
| id | ntu-10356/170043 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:33:41Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1700432023-08-22T06:43:26Z Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate Yan, Yao Fang, Yanan Verma, Vivek Li, Jun Wang, Yong Yang, Yongqiang Chen, Fanrong Zhu, Runliang Wu, Shijun Hooper, Thomas J. N. White, Timothy John School of Materials Science and Engineering Engineering::Materials Hydroxylapatite Phase Evolution The formation of As(V) substituted hydroxylapatite (HAP) has a vital influence on the fate of As(V) in the environment. However, despite growing evidence showing that HAP crystallizes in vivo and in vitro with amorphous calcium phosphate (ACP) as a precursor, a knowledge gap exists concerning the transformation from arsenate-bearing ACP (AsACP) to arsenate-bearing HAP (AsHAP). Here we synthesized AsACP nano-particles with varied As contents and investigated the arsenic incorporation during their phase evolution. The phase evolution results showed that the transformation process of AsACP to AsHAP could be divided into three Stages. A higher As(V) loading significantly delayed the transformation of AsACP, increased the distortion degree, and decreased the crystallinity of AsHAP. NMR result showed that the PO43- tetrahedral is geometrically preserved when PO43- is substituted by AsO43-. From AsACP to AsHAP, the As-substitution led to the transformation inhibition and As(V) immobilization. We are grateful for the funding from the Fundamental and Applied Fundamental Research Major Program of Guangdong Province (Grant No. 2019B030302013), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021A1515011531), the National Natural Science Foundation of China (Grant No. 41877135), the Science and Technology Planning Project of Guangdong Province, China (Grant No. 2020B1212060055), and the Monetary Academic Resources for Research Grant (Grant No. 001561-00001) to Prof Tim White at NTU. Yan Yao appreciates the financial support from China Scholarship Council for her year-long study at Nanyang Technological University, Singapore (CSC, 202104910449). 2023-08-22T06:43:26Z 2023-08-22T06:43:26Z 2023 Journal Article Yan, Y., Fang, Y., Verma, V., Li, J., Wang, Y., Yang, Y., Chen, F., Zhu, R., Wu, S., Hooper, T. J. N. & White, T. J. (2023). Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate. Journal of Hazardous Materials, 448, 130973-. https://dx.doi.org/10.1016/j.jhazmat.2023.130973 0304-3894 https://hdl.handle.net/10356/170043 10.1016/j.jhazmat.2023.130973 36860081 2-s2.0-85147879359 448 130973 en Journal of Hazardous Materials © 2023 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Hydroxylapatite Phase Evolution Yan, Yao Fang, Yanan Verma, Vivek Li, Jun Wang, Yong Yang, Yongqiang Chen, Fanrong Zhu, Runliang Wu, Shijun Hooper, Thomas J. N. White, Timothy John Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate |
| title | Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate |
| title_full | Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate |
| title_fullStr | Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate |
| title_full_unstemmed | Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate |
| title_short | Phase evolution and arsenic immobilization of arsenate-bearing amorphous calcium phosphate |
| title_sort | phase evolution and arsenic immobilization of arsenate bearing amorphous calcium phosphate |
| topic | Engineering::Materials Hydroxylapatite Phase Evolution |
| url | https://hdl.handle.net/10356/170043 |
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