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- W3005031840 endingPage "5008" @default.
- W3005031840 startingPage "4994" @default.
- W3005031840 abstract "Three low-cost adsorbents (purified raw attapulgite (A-ATP), high-temperature-calcined attapulgite (T-ATP), and hydrothermal loading of MgO (MgO-ATP)) were prepared as adsorbents for the removal of Cd(II) and Pb(II). By evaluating the effect of the initial solution pH, contact time, initial solution concentration, temperature and coexistence of metal ions on Cd(II) and Pb(II) adsorption, the experimental results showed that MgO-ATP was successfully prepared by hydrothermal reaction and calcination as well as appearing to be a promising excellent adsorbent. At an initial pH of 5.0, A-ATP, T-ATP and MgO-ATP reached maximum adsorption amounts of 43.5, 53.9 and 127.6 mg/g for Pb(II) and 10.9, 11.2, and 25.3 mg/g for Cd(II) at 298 K, respectively. The Cd(II) adsorption on A-ATP was fitted by the Freundlich model, while the adsorption of Pb(II) and Cd(II) on T-ATP and MgO-ATP as well as Pb(II) adsorption on A-ATP agreed with the Langmuir model. All kinetic experimental data favored pseudo second-order model. The calculated thermodynamic parameters suggested that Pb(II) adsorption onto MgO-ATP was spontaneous and exothermic. When considering foreign metal ions, the three adsorbents all presented preferential adsorption for Pb (II). Chemical adsorption had a high contribution to the removal of Cd(II) and Pb(II) by modified attapulgite. In summary, the adsorption was greatly enhanced by the hydrothermal loading of MgO. It aimed to provide insights into the MgO-ATP, which could be able to efficiently remove Cd(II) and Pb(II) and serve as an economic and promising adsorbent for heavy metal-contaminated environmental remediation." @default.
- W3005031840 created "2020-02-14" @default.
- W3005031840 creator A5024329311 @default.
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- W3005031840 creator A5061498511 @default.
- W3005031840 creator A5067240626 @default.
- W3005031840 creator A5072614838 @default.
- W3005031840 date "2020-04-01" @default.
- W3005031840 modified "2023-10-16" @default.
- W3005031840 title "Removal of Cd(II) and Pb(II) from aqueous solution by modified attapulgite clay" @default.
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- W3005031840 doi "https://doi.org/10.1016/j.arabjc.2020.01.022" @default.
- W3005031840 hasPublicationYear "2020" @default.