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240108s2024 xx |||||o 00| ||eng c |
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|a 10.1016/j.wasman.2023.12.036
|2 doi
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|a pubmed25n1221.xml
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|a (PII)S0956-053X(23)00773-0
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|a eng
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|a Schlederer, Felizitas
|e verfasserin
|4 aut
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|a Micropollutants in biochar produced from sewage sludge
|b A systematic review on the impact of pyrolysis operating conditions
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 16.01.2024
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|a Date Revised 16.01.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2023 Elsevier Ltd. All rights reserved.
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|a Biochar obtained from sewage sludge serves as a valuable soil amendment in agriculture, enhancing soil properties by increasing the nutrient content, cation exchange capacity, water retention, and oxygen transmission. However, its utilisation is hampered by the presence of micropollutants such as polycyclic aromatic hydrocarbons (PAHs), polychlorinated dibenzodioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), and volatile organic compounds (VOCs). Previous studies indicate that the type and amount of micropollutants can be significantly adjusted by selecting the right process parameters. This literature review provides an overview of how (1) pyrolysis temperature, (2) carrier gas flow and type, (3) heating rate, and (4) residence time affect the concentration of micropollutants in biochar produced from sewage sludge. The micropollutants targeted are those listed by the European Biochar Certificate (EBC) and by the International Biochar Institution (IBI), including PAHs, PCDD/Fs, PCBs and VOCs. In addition, per- and poly-fluoroalkyl substances (PFAS) are also considered due to their presence in sewage sludge. The findings suggest that higher pyrolysis temperatures reduce micropollutant levels. Moreover, the injection of a carrier gas (N2 or CO2) during the pyrolysis and cooling processes effectively lowers PAHs and PCDD/Fs, by reducing the contact of biochar with oxygen, which is crucial in mitigating micropollutants. Nevertheless, limited available data impedes an assessment of the impact of these parameters on PFAS in biochar. In addition, further research is essential to understand the effects of carrier gas type, heating rate, and residence time in order to determine the optimal pyrolysis process parameters for generating clean biochar
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|a Systematic Review
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|a Journal Article
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|a Biochar
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|a PAHs
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|a PCBs
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|a PCDD/Fs
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|a PFAS
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|a Sewage sludge
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|a VOCs
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|a Sewage
|2 NLM
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|a Polychlorinated Dibenzodioxins
|2 NLM
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|a Polychlorinated Biphenyls
|2 NLM
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|a DFC2HB4I0K
|2 NLM
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|a biochar
|2 NLM
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|a Dibenzofurans
|2 NLM
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|a Charcoal
|2 NLM
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|a 16291-96-6
|2 NLM
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|a Polycyclic Aromatic Hydrocarbons
|2 NLM
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|a Soil
|2 NLM
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|a Oxygen
|2 NLM
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|a S88TT14065
|2 NLM
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|a Fluorocarbons
|2 NLM
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|a Martín-Hernández, Edgar
|e verfasserin
|4 aut
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1 |
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|a Vaneeckhaute, Céline
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Waste management (New York, N.Y.)
|d 1999
|g 174(2024) vom: 15. Feb., Seite 618-629
|w (DE-627)NLM098197061
|x 1879-2456
|7 nnas
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|g volume:174
|g year:2024
|g day:15
|g month:02
|g pages:618-629
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|u http://dx.doi.org/10.1016/j.wasman.2023.12.036
|3 Volltext
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