Potential of Compost and Spent Coffee Grounds as Sources of Humic-Like Substances: Extraction Modeling and Optimization by Fractional Factorial Design DOI Creative Commons
Dominik Nieweś, Kinga Marecka

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Humic substances (HSs) play a crucial role in soil health and have potential applications beyond agriculture. This study evaluates the renewable raw materials such as compost from urban green waste (GWC) spent coffee grounds (SCG) sources of humic-like (HLSs), which may be an alternative to traditional resources peat, lignite, leonardite. The quantitative analysis focused on modeling optimizing efficiency ultrasound-assisted extraction acids (HLAs) function time, ultrasound intensity, extractant concentration (NaOH), temperature. Experimental points were determined based experimental matrix according fractional factorial design (FFD), obtained polynomial models evaluated using Fisher test, lack fit assessment, determination coefficients. verification with optimal values parameters demonstrated possibility extracting HLAs GWC SCG at levels 27.08 19.11%, respectively. qualitative included fulvic-like their comparison reference samples. Spectroscopic methods (UV-vis, ATR-FTIR, CP/MAS, 13C NMR) well elemental (CHNSO) used this part study. results showed presence functional groups characteristic humic (polysaccharides, phenols, alcohols, amides) molecular structure products. Additionally, they exhibited higher content nitrogen sulfur compared commercial samples, lower hydrophobicity, indicate biological activity.

Language: Английский

Potential of Compost and Spent Coffee Grounds as Sources of Humic-Like Substances: Extraction Modeling and Optimization by Fractional Factorial Design DOI Creative Commons
Dominik Nieweś, Kinga Marecka

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Humic substances (HSs) play a crucial role in soil health and have potential applications beyond agriculture. This study evaluates the renewable raw materials such as compost from urban green waste (GWC) spent coffee grounds (SCG) sources of humic-like (HLSs), which may be an alternative to traditional resources peat, lignite, leonardite. The quantitative analysis focused on modeling optimizing efficiency ultrasound-assisted extraction acids (HLAs) function time, ultrasound intensity, extractant concentration (NaOH), temperature. Experimental points were determined based experimental matrix according fractional factorial design (FFD), obtained polynomial models evaluated using Fisher test, lack fit assessment, determination coefficients. verification with optimal values parameters demonstrated possibility extracting HLAs GWC SCG at levels 27.08 19.11%, respectively. qualitative included fulvic-like their comparison reference samples. Spectroscopic methods (UV-vis, ATR-FTIR, CP/MAS, 13C NMR) well elemental (CHNSO) used this part study. results showed presence functional groups characteristic humic (polysaccharides, phenols, alcohols, amides) molecular structure products. Additionally, they exhibited higher content nitrogen sulfur compared commercial samples, lower hydrophobicity, indicate biological activity.

Language: Английский

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