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- W2989880420 endingPage "135252" @default.
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- W2989880420 abstract "Novel salt-based biochar was prepared by loading silicon (Si) on cornstalk biomass with one-step sintering technique. Manganese (Mn) was also used to modify biochar with the same method as a control. Surface morphology, elemental composition, crystal structure and surface area of salt-based biochars were analyzed by SEM + EDS, XRD, FTIR and BET, and the effects of the dosage of absorbent and pH of solution on the adsorption process were explored. Si and Mn could be successfully attached on the biochar surface as oxide forms. SiBC exhibited a dense and agglomerated surface, while MnBC was a kind of porous and rough materials. The optimal adsorption capability would realize when putting 2 g/L of biochar composites at pH = 5-6. Adsorption isotherms, adsorption kinetics, combine with FTIR and XPS were carried out to help to elaborate the adsorption mechanisms. The maximum adsorption capacity of Cu (II) was 152.61 mg/g on SiBC and it could reach at 97% of removal rate within 10 min when the concentration was 100 mg/L, while MnBC had to take 500 min to achieve the same adsorption effect, and reached 187.76 mg/g of maximum adsorption capacity. Langmuir model and pseudo-second-order model were more suitable for both SiBC and MnBC, which meant the monolayer and chemical adsorption were dominated. Surface complexation and precipitation was attributed to SiBC. Specialistic adsorption, ion exchange and intra-particle diffusion was put it down to MnBC." @default.
- W2989880420 created "2019-12-05" @default.
- W2989880420 creator A5015434957 @default.
- W2989880420 creator A5054911839 @default.
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- W2989880420 date "2020-02-01" @default.
- W2989880420 modified "2023-10-02" @default.
- W2989880420 title "Modification of biochar with silicon by one-step sintering and understanding of adsorption mechanism on copper ions" @default.
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- W2989880420 doi "https://doi.org/10.1016/j.scitotenv.2019.135252" @default.
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