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- W3002221073 endingPage "136897" @default.
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- W3002221073 abstract "Hydrochar produced from agricultural and forestry wastes and its application into the environment are very attractive. Herein, a high-efficiency dithiocarbamate-modified hydrochar (DTHC) was prepared successfully and then applied to eliminate Pb(II) from aqueous solutions. DTHC was characterized by various techniques. It was found that dithiocarbamate and amine groups were successfully grafted onto the surface of hydrochar. The surface area of DTHC was 7.94 m2·g-1, which was four folds less than pristine hydrochar (31.60 m2·g-1), but its adsorption capacity obviously increased. Adsorption experiments showed that the Pb(II) adsorption process onto DTHC well accorded with pseudo-2nd-order kinetics and Langmuir isotherms. The highest Pb(II) uptake by DTHC at 293 K determined from the Langmuir model was 151.51 mg·g-1. Fourier transform infrared spectra and X-ray photoelectron spectroscopy verified that dithiocarbamate, carboxylate, amine and sulfonate groups all facilitated the Pb(II) adsorption. The adsorption mechanism was ascribed to the inner-sphere surface complexation of Pb(II) by these groups and to the ion exchange between Pb(II) and Na(I). Thus, DTHC is an effective adsorbent for Pb(II) removal from water." @default.
- W3002221073 created "2020-01-30" @default.
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- W3002221073 date "2020-04-01" @default.
- W3002221073 modified "2023-10-09" @default.
- W3002221073 title "Removal of aqueous-phase lead ions by dithiocarbamate-modified hydrochar" @default.
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- W3002221073 doi "https://doi.org/10.1016/j.scitotenv.2020.136897" @default.
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