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- W2763495267 abstract "BackgroundBiorefinery processes utilize carbohydrates from biomass in order to produce biochemical and biomaterials. Lignin as the byproduct after biorefinery needs to be studied for applications. This study evaluated how hot water pretreatment, a typical biorefinery process, will impact on the heavy metal adsorption capacity of lignin.ResultsPaulownia elongate acid insoluble lignin was tested for its heavy metal adsorption capacities with Pb(II), Cu(II) and Cd(II). Hot water pretreatment was conducted on the lignin with both water and dilute acetic acid solution. Samples with both increased and decreased adsorption capacity were observed after the pretreatment, while samples with long duration of pretreatment encountered a substantial loss in the adsorption ability. Depolymerization and condensation lignin reaction schemes under acidic environment were summarized and applied to explain the capacity changes. NMR analysis was performed to quantify the functional groups in the lignin samples. Changes in the amount of functional groups were found in the samples after pretreatment.ConclusionHot water pretreatment can either increase or decrease the adsorption capacity of lignin depending on the treatment duration. Lignin byproducts after treated under acidic and high temperature environment with long duration is no longer suggested to be used as a heavy metal adsorbent." @default.
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- W2763495267 date "2017-11-30" @default.
- W2763495267 modified "2023-10-04" @default.
- W2763495267 title "The effect of hot water pretreatment on the heavy metal adsorption capacity of acid insoluble lignin from Paulownia elongata" @default.
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- W2763495267 doi "https://doi.org/10.1002/jctb.5469" @default.
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