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Geochemical and Spectroscopic Investigations of Cd and Pb Sorption Mechanisms on Contrasting Biochars: Engineering Implications
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SYSNO ASEP 0432684 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Geochemical and Spectroscopic Investigations of Cd and Pb Sorption Mechanisms on Contrasting Biochars: Engineering Implications Author(s) Trakal, L. (CZ)
Bingöl, D. (TR)
Pohořelý, Michael (UCHP-M) RID, ORCID, SAI
Hruška, M. (CZ)
Komárek, M. (CZ)Source Title Bioresource Technology. - : Elsevier - ISSN 0960-8524
Roč. 171, NOV 2014 (2014), s. 442-451Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords biochar ; metals ; sorption mechanisms Subject RIV DK - Soil Contamination ; De-contamination incl. Pesticides R&D Projects GA14-02219S GA ČR - Czech Science Foundation (CSF) Institutional support UCHP-M - RVO:67985858 UT WOS 000343091700062 DOI 10.1016/j.biortech.2014.08.108 Annotation Biochars prepared from nut shells, plum stones, wheat straws, grape stalks and grape husks were tested as potential sorbents for Cd and Pb. Mechanisms responsible for metal retention were investigated and optimal sorption conditions were evaluated using the RSM approach. Results indicated that all tested biochars can effectively remove Cd and Pb from aqueous solution (efficiency varied between 43.8% and 100%). The removal rate of both metals is the least affected by the biochar morphology and specific surface but this removal efficiency is strongly pH-dependent. Results of variable metal removal combined with different optimized conditions explain the different metal sorption mechanisms, where the predominant mechanism is ion exchange. In addition, this mechanism showed very strong binding of sorbed metals as confirmed by the post-desorption of the fully metal-loaded biochars. Finally, these biochars could thus also be applicable for metal contaminated soils to reduce mobility and bioavailability of Cd and Pb. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2015
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