Comparação De Métodos Para Determinação De Substâncias Húmicas Em Fertilizantes Líquidos Comerciais

Dhein, Casiano A.; Dick, Deborah Pinheiro; Bender, Andressa C.

doi:10.21577/0100-4042.20170564

Cited by 2 publications

(1 citation statement)

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“…Considering the HA and FA levels reported on different labels of products on the marketin a study comparing HS analysis methods (Dhein, 2019), analyzing five commercial products, found levels of up to 9% -using the same methodology used in this work-, it can be stated that the leachate studied here has higher levels of these substances (Table 1). This characterizes it as a viable product alternative to provide the benefits to soil and plants described in the literature, such as improved rooting and nutrient absorption, in addition to resistance against pathogens and biotic stress.…”

Section: Quantification Of Humic Substancesmentioning

confidence: 60%

Characterization of humic substances developed during the composting of class II A organic solid waste: a case study in a composting plant in Montenegro, Brazil

Dalmora,

Koetz,

Hernández Palma

et al. 2023

LADEE

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Abstract The abundance of organic waste generated by agro-industrial activities leads to the need to find alternatives for adequate destinations for these. Composting is the most viable alternative due to its low cost, ease of operation and generation of a product with the possibility of economic exploitation. The objective of this work was to present the dynamics of the composting process in an organic waste processing plant in the municipality of Montenegro, RS, Brazil, as well as to present the results of chemical analyzes for the quantification of humic substances contained in the leachate resulting from the composting process. The results of the leachate revealed that it has high levels of humic substances (humic acids between 12.2 and 30.7%, fulvic acids between 12.2 and 45.5%) significantly higher than those found in the literature (9%). Leachate has humic characteristics desired for the preparation of a commercial product for use in agriculture and can be configured as an interesting extra income alternative for the economic health of the enterprise. Keywords: organic waste; composting; humic substances; agriculture.

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Section: Quantification Of Humic Substancesmentioning

confidence: 60%

Characterization of humic substances developed during the composting of class II A organic solid waste: a case study in a composting plant in Montenegro, Brazil

Dalmora,

Koetz,

Hernández Palma

et al. 2023

LADEE

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Ultrasound-Assisted Extraction of Humic Substances from Peat: Assessment of Process Efficiency and Products’ Quality

et al. 2022

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Results of efficiency of obtaining humic substances (HSs) from peat in traditional alkaline extraction (TAE) and ultrasound-assisted alkaline extraction (UAAE) are presented. The influence of the duration of the process and ultrasound intensity on the efficiency of extraction of humic acids (HAs) and fulvic acids (FAs) extraction was determined. The composition of the fulvic acid fraction was examined depending on the type of eluent used. Fulvic acids were divided into fractions using columns packed with DAX-8 resin. For this process, 0.1 M NaOH and 0.5 M NH3∙H2O were used as eluents. For the quality assessment of specific fulvic acids fractions, spectroscopic methods (UV-Vis and FTIR) were used. Ultrasound had a positive effect on HS extraction efficiency, especially in increasing the amount of a desired hydrophobic fraction of fulvic acids (HPO). However, a negative effect of the excessive prolongation and ultrasound intensity (approximately 400 mW∙cm−2) on the extraction efficiency of HPO eluted with 0.1 M NaOH solution was observed. Using peat as a raw carbon material for the HS extraction process can be used as an alternative industrial application of peat. UAAE may be considered as an alternative method to TAE, which provides a higher efficiency in HS isolation from peat.

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Comparação De Métodos Para Determinação De Substâncias Húmicas Em Fertilizantes Líquidos Comerciais

Cited by 2 publications

References 0 publications

Characterization of humic substances developed during the composting of class II A organic solid waste: a case study in a composting plant in Montenegro, Brazil

Characterization of humic substances developed during the composting of class II A organic solid waste: a case study in a composting plant in Montenegro, Brazil

Ultrasound-Assisted Extraction of Humic Substances from Peat: Assessment of Process Efficiency and Products’ Quality

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