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  Effect of water leaching on biochar properties and its impact on organic contaminant sorption

Schreiter, I. J., Schmidt, W., Kumar, A., Graber, E. R., & Schüth, C. (2020). Effect of water leaching on biochar properties and its impact on organic contaminant sorption. Environmental Science and Pollution Research, 27(1), 691-703. doi:10.1007/s11356-019-06904-2.

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 Creators:
Schreiter, Inga J.1, Author
Schmidt, Wolfgang2, Author              
Kumar, Abhay3, Author
Graber, Ellen R.3, Author
Schüth, Christoph1, Author
Affiliations:
1Institute of Applied Geosciences, Technische Universität Darmstadt, Schnittspahnstraße 9, 64287, Darmstadt, Germany, ou_persistent22              
2Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445618              
3Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, P.O. Box 15159, 7505101, Rishon LeZion, Israel, ou_persistent22              

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Free keywords: Biochar; Accelerated leaching; Leachable organic carbon; Pore clogging; Trichloroethylene; Tetrachloroethylene
 Abstract: When biochar (BC) is applied to soil, one process that can alter its properties and contaminant sorption is the leaching of minerals and dissolved organic carbon (DOC). This study investigated changes in properties of three BCs (cattle manure, grain husk, and wood chips), due to leaching, and the subsequent impact on sorption of trichloroethylene (TCE) and tetrachloroethylene (PCE). The manure-derived BC released 27.4 mg g−1 DOC, which is over ten times more than that measured for the two plant-based BCs (2.5 and 1.5 mg g−1 DOC for grain husk and wood chips, respectively). In all leachates, potassium is the dominant cation, whereas chloride, sulfate, and phosphate are the main anions. In total, the manure-derived biochar released the highest sum of total ions (73.1 mg g−1), followed by BC produced from grain husk (15.5 mg g−1) and wood chips (1.2 mg g−1). Leaching increased external surface area, mesopore volume, and hydrophobicity of the manure-derived BC and decreased its polarity. This enhanced sorption via partitioning. In plant-based BCs, micropore volume and size distribution were altered, most likely through the un-blocking of pores, causing increased sorption via pore-filling for both TCE and PCE. The results indicate that, depending on feedstock material, BC leaching can alter the environmental fate of organic compounds.

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Language(s): eng - English
 Dates: 2019-06-142019-10-282019-12-052020-01-01
 Publication Status: Published in print
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1007/s11356-019-06904-2
 Degree: -

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Title: Environmental Science and Pollution Research
  Other : Environ. Sci. Pollut. Res.
Source Genre: Journal
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Publ. Info: Berlin : Springer
Pages: - Volume / Issue: 27 (1) Sequence Number: - Start / End Page: 691 - 703 Identifier: ISSN: 0944-1344
CoNE: https://pure.mpg.de/cone/journals/resource/954925572909