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- W3113767899 abstract "A 2,5-dimercapto-1,3,4-thiadiazole (DMTD)-immobilized and persimmon tannin (PT)-based biosorbent, DMTD-PT, was synthesized via a one-pot method and used for selective enrichment of Ag(I) from electronic waste (e-waste) leachate. Batch adsorption revealed that both PT and DMTD-PT had a weaker affinity for co-existing metal cations. However, DMTD-PT and PT adsorbed 98.7% and 20.7% of Ag(I), respectively, with a dose of 5.0 g L−1 each at pH 3.0 from e-waste leachate that contained 117.3 mg L−1 of Ag(I) at room temperature. These observations indicate that the selectivity of DMTD-PT is superior to that of PT. The column adsorption further proved that DMTD-PT can be used to separate Ag(I) from e-waste leachate. The adsorption of Ag(I) on DMTD-PT fit the Langmuir isotherm well with a maximum adsorptive capacity of 50.7 mg g−1. A thermodynamics study further indicated that the adsorption was spontaneous and was dominated by chemisorption. The two mass transfer models of homogeneous solid diffusion model (HSDM) and a Linear Driving Force (LDF) model were used to study the kinetics and generally well fitted the experimental data. Analyses of Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) of fresh and Ag(I)-adsorbed DMTD-PT further revealed that the plausible adsorption mechanism was principally attributable to the complexation of N and S on the diazole ring. Also, DMTD-PT exhibited better reusability and qualified durability without a distinct decrease in Ag(I) adsorption even after 5 repeated cycles." @default.
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- W3113767899 date "2021-02-01" @default.
- W3113767899 modified "2023-09-27" @default.
- W3113767899 title "Selective enrichment and separation of Ag(I) from electronic waste leachate by chemically modified persimmon tannin" @default.
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- W3113767899 doi "https://doi.org/10.1016/j.jece.2020.104994" @default.
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