Valuable polar moieties on cereal-derived biochars

Magda Caban , Agnieszka Folentarska , Hanna Lis , Paulina Kobylis , Jolanta Kumirska , Piotr Stepnowski , Wojciech Ciesielski

Abstract

The application of biochar (BC) in various fields of engineering, agriculture and environmental protection demands the task-specific adjustment of the surface characteristics of the carbon material. Polar moieties are those elements which distinguish BC from regular carbon black. The knowledge of polar moieties on the surface of the BC is crucial for its application for polar pollutants removal and resistance of nutrients. In this paper several techniques were applied for the verification of polar moieties of crop-derived biochars (both straw and grain) by several techniques (SBET, FTIR, SEM, EDS, pHPZC, elemental analysis). The characterization was also made for washed BCs. It was found that this carbon material is rich in polar moieties, mostly hydroxyl groups and oxides, the latter being washed away together with salts. The high oxygen content decreased after washing (>15%). The values of pHZPC do not differ between the tested BCs, were in the range of 2.2 to 2.0, and were not changed after the washing of BCs. Thanks to the SBET isotherm analysis, irreversible changes in the material structure by water adsorption were proven. The oxygen content in the surface of BCs can be changed after a very brief time of exposition to natural water or soil with no change in the surface charge. Still, the biochar derived from cereals is a useful material for application in environmental protection purposes.
Author Magda Caban (FCh / DEA / PAiMŚ)
Magda Caban,,
- Pracownia Analityki i Monitoringu Środowiska
, Agnieszka Folentarska - [Akademia im. Jana Dlugosza w Czestochowie]
Agnieszka Folentarska,,
-
- Akademia im. Jana Dlugosza w Czestochowie
, Hanna Lis (FCh / DEA / PAiMŚ)
Hanna Lis,,
- Pracownia Analityki i Monitoringu Środowiska
, Paulina Kobylis (FCh / DEA / LChER)
Paulina Kobylis,,
- Laboratory of Chemical Environmental Risks
, Jolanta Kumirska (FCh / DEA / LChAD)
Jolanta Kumirska,,
- Laboratory of Chemical Analytics and Diagnostics
, Piotr Stepnowski (FCh / DEA / LChER)
Piotr Stepnowski,,
- Laboratory of Chemical Environmental Risks
, Wojciech Ciesielski - [Akademia im. Jana Dlugosza w Czestochowie]
Wojciech Ciesielski,,
-
- Akademia im. Jana Dlugosza w Czestochowie
Journal seriesColloids and Surfaces A-Physicochemical and Engineering Aspects, ISSN 0927-7757, (A 30 pkt)
Issue year2019
Vol561
Pages275-282
Publication size in sheets0.5
Keywords in Englishbiochar, biochar characteristics, washed biochar, polar moieties
DOIDOI:10.1016/j.colsurfa.2018.11.008
URL https://doi.org/10.1016/j.colsurfa.2018.11.008
Languageen angielski
Score (nominal)30
ScoreMinisterial score = 30.0, 11-12-2018, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 11-12-2018, ArticleFromJournal
Publication indicators Scopus Citations = 0; WoS Citations = 0; WoS Impact Factor: 2016 = 2.714 (2) - 2016=2.838 (5)
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