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Lead and cadmium sorption mechanisms on magnetically modified biochars
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SYSNO ASEP 0466658 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Lead and cadmium sorption mechanisms on magnetically modified biochars Author(s) Trakal, L. (CZ)
Veselská, V. (CZ)
Šafařík, Ivo (UEK-B) RID, SAI
Vítková, M. (CZ)
Číhalová, S. (CZ)
Komárek, M. (CZ)Number of authors 6 Source Title Bioresource Technology. - : Elsevier - ISSN 0960-8524
Roč. 203, MAR (2016), s. 318-324Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords pyrolysis bio-chars ; aqueous-solutions ; heavy-metals ; removal ; adsorption ; water ; contaminants ; pb ; temperatures ; copper ; Magnetic biochar ; Fe oxide impregnation ; Metal sorption ; Cation release ; Wastewater treatment Subject RIV EI - Biotechnology ; Bionics R&D Projects LD14066 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support RVO:67179843 - RVO:67179843 UT WOS 000368016000042 EID SCOPUS 84952705226 DOI 10.1016/j.biortech.2015.12.056 Annotation This paper discusses Cd(II) and Pb(II) sorption efficiency of biochars modified by impregnation with magnetic particles. All selected biochar characteristics were significantly affected after the modification. More specifically, the cation exchange capacity increased after the modification, except for grape stalk biochar. However, the changes in the pH value, PZC, and BET surface after modification process were less pronounced. The metal loading rate was also significantly improved, especially for Cd(II) sorption on/in nut shield and plum stone biochars (10- and 16-times increase, respectively). The results indicated that cation exchange (as a metal sorption mechanism) was strengthened after Fe oxide impregnation, which limited the desorbed amount of tested metals. In contrast, the magnetization of grape stalk biochar reduced Pb(II) sorption in comparison with that of pristine biochar. Magnetic modification is, therefore, more efficient for biochars with well-developed structure and for more mobile metals, such as Cd(II). (C) 2015 Elsevier Ltd. All rights reserved. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2017
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