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A rapid way to synthesize magnesium whitlockite microspheres for high efficiency removing heavy metals
Lin, Chucheng; Wang, Yueyue; Zhou, Yang; Zeng, Yi
2019-09-01
Source PublicationDESALINATION AND WATER TREATMENT
ISSN1944-3994
Volume162Pages:220
SubtypeArticle
AbstractMagnesium whitlockite has been widely applied in many fields, such as protein adsorption and drug delivery. However, the application of MWH in heavy metal adsorption has not been reported yet. To obtain the adsorbents with high adsorption capacity, we developed a rapid way to synthesize magnesium whitlockite microspheres with nano-pores by microwave hydrothermal method using the adenosine 5'-triphosphate disodium salt hydrate as a phosphorus source. The effects of the reaction time and temperature on the composition and morphology of magnesium whitlockite were investigated. Heavy metal removal ability of the prepared magnesium whitlockite at different adsorption time and initial Pb2+ concentration was studied. The results showed that the reaction temperature and time did not have an obvious effect on the microstructure of the prepared MWH. They were about 300 nm in diameter with rough surfaces. Adsorption studies showed that Pb2+ ions could be adsorbed remarkably and efficiently by the prepared MWH. The adsorption equilibrium of MWH in Pb2+ solution (200 mg L-1) could be reached in 5 min. The adsorption kinetic study showed that it obeyed the pseudo-second-order kinetic model and the Langmuir isotherm model. The experimental maximum adsorption capacity of the prepared MWH was 2311 mg L-1. Furthermore, the remove percentage of Cd2+, Cu2+ and Pb2+ ions by the MWH in a mixed solution containing these metal ions were 22.3%, 21.2%, and 86.4%, respectively, indicating that the prepared MWH had an ability to electively adsorb Pb2+ ions in Cd2+, Cu2+, and Pb2+-containing solution. Therefore, the prepared magnesium whitlockite is a promising adsorbent for being used in the treatment of water pollution.
KeywordMagnesium whitlockite Heavy metals Selective adsorption Water pollution
DOI10.5004/dwt.2019.24290
Language英语
WOS Research AreaEngineering ; Water Resources
PublisherDESALINATION PUBL
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26874
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Lin, Chucheng,Wang, Yueyue,Zhou, Yang,et al. A rapid way to synthesize magnesium whitlockite microspheres for high efficiency removing heavy metals[J]. DESALINATION AND WATER TREATMENT,2019,162:220.
APA Lin, Chucheng,Wang, Yueyue,Zhou, Yang,&Zeng, Yi.(2019).A rapid way to synthesize magnesium whitlockite microspheres for high efficiency removing heavy metals.DESALINATION AND WATER TREATMENT,162,220.
MLA Lin, Chucheng,et al."A rapid way to synthesize magnesium whitlockite microspheres for high efficiency removing heavy metals".DESALINATION AND WATER TREATMENT 162(2019):220.
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