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Enhanced Dissolution and Transformation of ZnO Nanoparticles: The Role of Inositol Hexakisphosphate.
Environ Sci Technol. 2016 06 07; 50(11):5651-60.ES

Abstract

The toxicity, reactivity, and behavior of zinc oxide (ZnO) nanoparticles (NPs) released in the environment are highly dependent on environmental conditions. Myo-inositol hexakisphosphate (IHP), a common organic phosphate, may interact with NPs and generate new transformation products. In this study, the role of IHP in mediating the dissolution and transformation of ZnO NPs was investigated in the laboratory kinetic experiments using powder X-ray diffraction, attenuated total reflectance Fourier transform infrared spectroscopy, (31)P nuclear magnetic resonance spectroscopy, high-resolution transmission electronic microscopy, and synchrotron-based extended X-ray absorption fine structure spectroscopy. The results indicate that IHP shows a dissolution-precipitation effect, which is different from citrate and EDTA that only enhances Zn dissolution. The enhanced dissolution and transformation of ZnO NPs by IHP (<0.5 h) is found to be strikingly faster than that induced by inorganic phosphate (Pi, > 3.0 h) at pH 7.0, and the reaction rate increases with decreasing pH and increasing IHP concentration. Multitechnique analyses reveal that interaction of ZnO NPs with IHP induces rapid transformation of ZnO NPs into zinc phytate complexes initially and poorly crystalline zinc phytate-like (Zn-IHP) phase finally. Additionally, ZnO NPs preferentially react with IHP and transform to Zn-IHP when Pi and IHP concurrently coexist in a system. Overall, results from this study contribute to an improved understanding of the role of organic phosphates (e.g., IHP) in the speciation and structural transformation of ZnO NPs, which can be leveraged for remediation of ZnO-polluted water and soils.

Authors+Show Affiliations

Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, People's Republic of China.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, People's Republic of China.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, People's Republic of China.Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University , Nanjing 210093, People's Republic of China.Department of Plant and Soil Sciences, University of Delaware , Newark, Delaware 19716, United States.Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100039, China.Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100039, China.Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University , Wuhan 430070, People's Republic of China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

27159895

Citation

Feng, Xionghan, et al. "Enhanced Dissolution and Transformation of ZnO Nanoparticles: the Role of Inositol Hexakisphosphate." Environmental Science & Technology, vol. 50, no. 11, 2016, pp. 5651-60.
Feng X, Yan Y, Wan B, et al. Enhanced Dissolution and Transformation of ZnO Nanoparticles: The Role of Inositol Hexakisphosphate. Environ Sci Technol. 2016;50(11):5651-60.
Feng, X., Yan, Y., Wan, B., Li, W., Jaisi, D. P., Zheng, L., Zhang, J., & Liu, F. (2016). Enhanced Dissolution and Transformation of ZnO Nanoparticles: The Role of Inositol Hexakisphosphate. Environmental Science & Technology, 50(11), 5651-60. https://doi.org/10.1021/acs.est.6b00268
Feng X, et al. Enhanced Dissolution and Transformation of ZnO Nanoparticles: the Role of Inositol Hexakisphosphate. Environ Sci Technol. 2016 06 7;50(11):5651-60. PubMed PMID: 27159895.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced Dissolution and Transformation of ZnO Nanoparticles: The Role of Inositol Hexakisphosphate. AU - Feng,Xionghan, AU - Yan,Yupeng, AU - Wan,Biao, AU - Li,Wei, AU - Jaisi,Deb P, AU - Zheng,Lirong, AU - Zhang,Jing, AU - Liu,Fan, Y1 - 2016/05/17/ PY - 2016/5/10/entrez PY - 2016/5/10/pubmed PY - 2017/6/8/medline SP - 5651 EP - 60 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 50 IS - 11 N2 - The toxicity, reactivity, and behavior of zinc oxide (ZnO) nanoparticles (NPs) released in the environment are highly dependent on environmental conditions. Myo-inositol hexakisphosphate (IHP), a common organic phosphate, may interact with NPs and generate new transformation products. In this study, the role of IHP in mediating the dissolution and transformation of ZnO NPs was investigated in the laboratory kinetic experiments using powder X-ray diffraction, attenuated total reflectance Fourier transform infrared spectroscopy, (31)P nuclear magnetic resonance spectroscopy, high-resolution transmission electronic microscopy, and synchrotron-based extended X-ray absorption fine structure spectroscopy. The results indicate that IHP shows a dissolution-precipitation effect, which is different from citrate and EDTA that only enhances Zn dissolution. The enhanced dissolution and transformation of ZnO NPs by IHP (<0.5 h) is found to be strikingly faster than that induced by inorganic phosphate (Pi, > 3.0 h) at pH 7.0, and the reaction rate increases with decreasing pH and increasing IHP concentration. Multitechnique analyses reveal that interaction of ZnO NPs with IHP induces rapid transformation of ZnO NPs into zinc phytate complexes initially and poorly crystalline zinc phytate-like (Zn-IHP) phase finally. Additionally, ZnO NPs preferentially react with IHP and transform to Zn-IHP when Pi and IHP concurrently coexist in a system. Overall, results from this study contribute to an improved understanding of the role of organic phosphates (e.g., IHP) in the speciation and structural transformation of ZnO NPs, which can be leveraged for remediation of ZnO-polluted water and soils. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/27159895/Enhanced_Dissolution_and_Transformation_of_ZnO_Nanoparticles:_The_Role_of_Inositol_Hexakisphosphate_ L2 - https://dx.doi.org/10.1021/acs.est.6b00268 DB - PRIME DP - Unbound Medicine ER -