Identifying the key factors that affect the formation of humic substance during different materials composting

Wu, Junqiu; Zhao, Yue; Qi, Haishi; Zhao, Xinyu; Yang, Tianxue; Du, Yingqiu; Zhang, Hui; Wei, Zimin

doi:10.1016/j.biortech.2017.08.100

Cited by 220 publications

(38 citation statements)

References 13 publications

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“…Parallel factor analysis (using the PARAFAC model) was carried out in MATLAB 2013a with the DOMFLuor toolbox. With reference to previous research results [15], some fluorescence characteristic parameters were selected to assess the humification degree of the four treatments: the fluorescence index f450/500, representing the ratio of emission intensity at 450 nm and 500 nm at 370 nm excitation; I436/I383, representing the ratio of fluorescence intensity at 436-383 nm; the ratio of fluorescence intensity at 454-399 nm I454/I399 was calculated from the spectra in the synchronous-scan excitation mode acquired; the emission band between 308 and 363 nm is referred to as the fulvic-like region (FLR), and the emission band between 363 and 595 nm as the humic-like region (HLR); the humification index A4/A1 was the ratio of the last quarter to the first quarter in the emission spectrum of 370-600 nm, whereas the (C2+C3)/C1 was the ratio of PARAFAC components, where C1 represents a protein-like substance, C2 represents a humic-like component, and C3 a xenobiotic component [16].…”

Section: Fluorescence Characteristic Parameter Selection and Statmentioning

confidence: 81%

Fluorescence Characteristics of Humic Acid in Chinese Black Soil under Long-Term Fertilization

Wei

Cai

et al. 2019

Advances in Polymer Technology

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Humic substances are important indicators of soil fertility. The fluorescence properties of humic acids from black soils in Harbin, northeast China, were investigated, after long-term fertilization using treatments with or without mineral fertilizer (NPK) and organic manure. Excitation and emission matrices combined with parallel factor analysis were used to investigate the structure of the humic acid. Principal component analysis was performed to select the most suitable parameters for the description of humic acid. The dimension reduction for the original fluorescence parameters extracted two principal components. By using the two principal component scores as a new index for clustering, it was concluded that long-term fertilization treatments in black soil in Harbin clustered into three groups of manure + NPK and organic manure treatments, NPK treatment, and soil without any fertilization. Manure + NPK fertilization and manure fertilization alone led to a higher degree of humification than NPK only or the control. We conclude that long-term fertilization with organic matter with or without NPK could increase the humification degree of these soils.

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Section: Fluorescence Characteristic Parameter Selection and Statmentioning

confidence: 81%

Fluorescence Characteristics of Humic Acid in Chinese Black Soil under Long-Term Fertilization

Wei

Cai

et al. 2019

Advances in Polymer Technology

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“…At the end of this phase, most of the microorganisms die due to nonavailability of sufficient food. In addition to this, thermophillic condition changed to mesophillic and temperature drops from 50-55C to 25 C. According to several authors [33,34,36], this stage occurred for longer period of time.…”

Section: Compositingmentioning

confidence: 97%

“…Fungi and bacteria are the main microbes which play significant role in release of hydrolytic and oxidative enzymes. These cellulolytic and lignocellulolytic activities transform the organic waste to humus substances [50,51]. Therefore, many studies have revealed that these enzymatic activities results into high quality of composts.…”

Section: Mechanism Of Decompositionmentioning

confidence: 99%

Role of Decomposers in Agricultural Waste Management

Iqbal¹,

Agrawal²,

Dubey³

et al. 2021

Biotechnological Applications of Biomass

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In this chapter, agricultural waste residue management by bio-organisms is discussed along with different types of decomposition processes. Tons of agricultural wastes are produced every year. These agricultural wastes create major environmental problems without effective means of management methods. There are many technologies being used for the decomposition, which mainly include anaerobic decomposition, compositing, fermentation, etc. All these decomposition processes depend upon the different soil-inhabiting microbes. These microbes are the key components of agri-residue decomposition process. Every step of decomposition requires different microbes. Various sets of catalytical enzymes are involved for the catabolic procedures of organic matter. By successive catabolic reactions, all the organic matters are mineralized into soil essential constituents, which will be the most effective sources of macro- and micronutrients for the soil fertility. Working efficiency of these microbes depends upon different parameters like moisture, temperature, pH, etc. The vitality and efficiency of microbes can be enhanced by using various inert carriers. If the efficiency of these soil microbes enhances by various factors, then the rate of decomposition could be enhanced to handle this ever-increasing problem of agriculture residue in near future.

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“…Utilization of these wastes in an environmentally friendly manner has received much attention [4][5][6]. Composting is an effective and acceptable biological process to convert organic solid wastes into fertilizer or soil conditioner for agricultural use, as composting improves soil fertility, reduces greenhouse gas emissions, and remediates soil heavy metal pollution [7][8][9][10][11]. During composting, unstable organic solid wastes are transformed into stable complex compounds such as humic acids (HAs) [12,13], which have larger molecular weights and higher aromaticity [14].…”

Section: Introductionmentioning

confidence: 99%

Insight into the cadmium and zinc binding potential of humic acids derived from composts by EEM spectra combined with PARAFAC analysis

et al. 2020

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AbstractTo investigate the characteristics of humic acids (HAs) and the combined effects of HAs on heavy metals, three HAs derived from kitchen waste compost (KW), pig manure compost (PM), and green waste compost (GW) were exposed to Cd(II) and Zn(II). The elemental contents and functional groups of HAs were different due to different raw materials. Fulvic-, humic-like content C1, humic-like content C4, and two protein-like contents C2 and C3 were identified in three HAs by EEM-PARAFAC analysis. The effects of HAs on heavy metals were associated with the metal species and HA source. Our results reveal that titrating Cd(II) caused stronger fluorescence quenching compared to titrating Zn(II) for all HAs. C1 and C4 of KW-HAs and PM-HAs showed fluorescence quenching after Cd(II) was added, whereas negligible fluorescence quenching was found when Zn(II) was added. In addition, C1 and C4 in the GW-HAs did not show obvious fluorescence quenching regardless of whether Cd(II) or Zn(II) was added. C3 in all HAs caused significant fluorescence quenching, suggesting that C3 plays an important role affecting the mobility of heavy metals. Consequently, these results suggest that HAs from KW and PM have greater potential for Cd-contaminated soil remediation than those from GW.

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Identifying the key factors that affect the formation of humic substance during different materials composting

Cited by 220 publications

References 13 publications

Fluorescence Characteristics of Humic Acid in Chinese Black Soil under Long-Term Fertilization

Fluorescence Characteristics of Humic Acid in Chinese Black Soil under Long-Term Fertilization

Role of Decomposers in Agricultural Waste Management

Insight into the cadmium and zinc binding potential of humic acids derived from composts by EEM spectra combined with PARAFAC analysis

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