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Monodisperse carbon nanospheres (CNs-APAM) with different APAM incorporation amounts were prepared by an assisted hydrothermal method using glucose, anionic polyacrylamide (APAM) as raw material. The samples were characterized and tested using SEM, FTTR, XRD, TG, and ultraviolet-visible spectrophotometer (UV-vis). The effects of APAM addition on the dispersion and yield of carbon nano spheres (CNs) and the adsorption performance of CNs on methylene blue (MB) with different APAM additions were investigated. Tt was shown that the best dispersion and highest yield of CNs were achieved at the addition of APAM at 1 20 mg, with the yield up to 21.5 %• The adsorption results showed that CNs-APAM had the best adsorption effect on MB with the maximum adsorption amount of 124.26 mg • g-1 when the addition amount of APAM was 1 20 mg, the adsorption time was about 2 h, the concentration of MB solution was 30 mg/L, and the initial pH of the solution was 100. The fitting results of the adsorption model showed that the process of MB adsorption by CNs-APAM was consistent with Langmuir model with quasi-secondary kinetic model. [ABSTRACT FROM AUTHOR]

A comprehensive experiment of sodium dodecyl benzene sulfonate (SDBS) intercalated nickel-titanium layered double hydroxide (NiTi-LDH-SDBS) synthesis and application in dye adsorption is designed. The NiTi-LDH-SDBS with SDBS guest molecule in the interlayer were successfully synthesized, and characterized by X-ray diffraction and infrared spectroscopy. The dye adsorption performance of the intercalation complex and the dye removal rate were quantitatively analyzed by ultraviolet-visible absorption spectroscopy. The results show that the adsorption of methylene blue (MB) on NiTi-LDH-SDBS is better than that of methyl orange (MO), owing to the stronger guest-guest interaction between MB and SDBS. The adsorption behavior of MB on NiTi-LDH-SDBS accords with Langmuir adsorption isotherm and pseudo-second-order equation, the calculated saturated adsorption amount was 181.2 mg/g, which was basically consistent with the experimental measurement of 176.4 mg/g. [ABSTRACT FROM AUTHOR]