1181b699c53568f3fa7de689916cf9b0 pmc_35057128.pdf 8327c7c5c2283fd53106f1e36be6e24d3cae517b pmc_35057128.pdf 9b80c25e05ac70296096ccbac635b4bac449ccc1acb0bb4a962b9b2aba8cc4cc pmc_35057128.pdf Title: Physicochemical Characterization of Cherry Pits-Derived Biochar Subject: Although the suitability of some biochars for contaminants’ sorption separation has been established, not all potential feedstocks have been explored and characterized. Here, we physicochemically characterized cherry pit biochar (CPB) pyrolyzed from cherry pit biomass (CP) at 500 C, and we assessed their As and Hg sorption efficiencies in aqueous solutions in comparison to activated carbon (AC). The basic physicochemical and material characterization of the studied adsorbents was carried out using pH, electrical conductivity (EC), cation exchange capacity (CEC), concentration of surface functional groups (Boehm titration), and surface area (SA) analysis; elemental C, H, N analysis; and Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM–EDX). AsO43- anions and Hg2+ cations were selected as model contaminants used to test the sorption properties of the sorption materials. Characterization analyses confirmed a ninefold increase in SA in the case of CPB. The total C concentration increased by 26%, while decreases in the total H and N concentrations were observed. The values of carbonate and ash contents decreased by about half due to pyrolysis processes. The concentrations of surface functional groups of the analyzed biochar obtained by Boehm titration confirmed a decrease in carboxyl and lactone groups, while an increase in phenolic functional groups was observed. Changes in the morphology and surface functionality of the pyrolyzed material were confirmed by SEM–EDX and FTIR analyses. In sorption experiments, we found that the CPB showed better results in the sorption separation of Hg2+ than in the sorption separation of AsO43-. The sorption efficiency for the model cation increased in the order CP < CPB < AC and, for the model anion, it increased in the order CPB < CP < AC. Keywords: biochar; pyrolysis; sorption separation; Hg; As Author: Vladimír Frišták, Diana Bošanská, Martin Pipíška, Libor Ďuriška, Stephen M. Bell and Gerhard Soja Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Thu Jan 6 11:01:58 2022 CET ModDate: Thu Jan 6 11:26:13 2022 CET Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 14 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2334733 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- RSHXZV+VnURWPalladioL Type 1 Custom yes yes no 10 0 VWAJRH+URWPalladioL-Bold Type 1 Custom yes yes no 15 0 ZYWMNQ+URWPalladioL-Roma Type 1 Custom yes yes no 20 0 UCQLUD+URWPalladioL-Ital Type 1 Custom yes yes no 24 0 SSHFLM+CMSY10 Type 1 Builtin yes yes no 28 0 SSNIUI+VnURWPalladioL-Bold Type 1 Custom yes yes no 32 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 40 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 44 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 48 0 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yes yes no 289 0 BCDIEE+PalatinoLinotype-Roman CID TrueType Identity-H yes yes yes 293 0 SymbolMT CID TrueType Identity-H yes no yes 301 0 ArialMT TrueType WinAnsi no no no 308 0 Jhove (Rel. 1.22.1, 2019-04-17) Date: 2022-04-23 02:26:23 CEST RepresentationInformation: pmc_35057128.pdf ReportingModule: PDF-hul, Rel. 1.12.1 (2019-04-17) LastModified: 2022-01-31 03:35:01 CET Size: 2334733 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 464 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@7b69c6ba Item: Title: Materials and Methods Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@46daef40 Children: Item: Title: Feedstock Origin and Biochar Pyrolysis Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@12f41634 Item: Title: Physicochemical Characterization Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@13c27452 Item: Title: Batch Sorption Test Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@262b2c86 Item: Title: Electrochemical Analysis of Hg and As Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@371a67ec Item: Title: Results and Discussion Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@5ed828d Children: Item: Title: Material Characterization Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@50d0686 Item: Title: Model Sorption Test Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@7a3d45bd Item: Title: Conclusions Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@1e7c7811 Item: Title: References Destination: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject@77ec78b9 Info: Title: Physicochemical Characterization of Cherry Pits-Derived Biochar Author: ざぬちつどねロひ〠うひどㅡぴメに〬〠いどちのち〠あはㅡちのびにメ〬〠きちひぴどの〠ぐどばロㅡにち〬〠がどぢはひ〠ㅜ〱㙜〰ふひどㅡにち〬〠こぴづばとづの〠き〮〠あづぬぬ〠ちのつ〠ぇづひとちひつ〠こはなち Subject: Although the suitability of some biochars for contaminants’ sorption separation has been established, not all potential feedstocks have been explored and characterized. Here, we physicochemically characterized cherry pit biochar (CPB) pyrolyzed from cherry pit biomass (CP) at 500 C, and we assessed their As and Hg sorption efficiencies in aqueous solutions in comparison to activated carbon (AC). The basic physicochemical and material characterization of the studied adsorbents was carried out using pH, electrical conductivity (EC), cation exchange capacity (CEC), concentration of surface functional groups (Boehm titration), and surface area (SA) analysis; elemental C, H, N analysis; and Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM EDX). AsO43- anions and Hg2+ cations were selected as model contaminants used to test the sorption properties of the sorption materials. Characterization analyses confirmed a ninefold increase in SA in the case of CPB. The total C concentration increased by 26%, while decreases in the total H and N concentrations were observed. The values of carbonate and ash contents decreased by about half due to pyrolysis processes. The concentrations of surface functional groups of the analyzed biochar obtained by Boehm titration confirmed a decrease in carboxyl and lactone groups, while an increase in phenolic functional groups was observed. Changes in the morphology and surface functionality of the pyrolyzed material were confirmed by SEM EDX and FTIR analyses. In sorption experiments, we found that the CPB showed better results in the sorption separation of Hg2+ than in the sorption separation of AsO43-. The sorption efficiency for the model cation increased in the order CP < CPB < AC and, for the model anion, it increased in the order CPB < CP < AC. 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