Insights into the molecular transformation in the dissolved organic compounds of agro-waste-hydrochars by microbial-aging using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry

Chu, Qingnan; Xue, Lihong; Wang, Bingyu; He, Huayong; Feng, Yanfang; Han, Lanfang; Yang, Linzhang; Xing, Baoshan

doi:10.1016/j.biortech.2020.124411

Cited by 19 publications

(14 citation statements)

References 48 publications

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“…In contrast, depolymerization reactions were the dominant reaction in sewage sludge-derived HCAPs, resulting in an increased number of organic compounds. 53 The weighted average molecular weight MW w of kitchen garbage-derived HCAPs was higher than that of sewage sludge-derived HCAPs, consistent with the SUVA 254 and A 250 /A 360 values. Increasing the HTC temperature caused the MW w of HCAPs to first decrease and then increase, probably due to the transformation of macromolecules into small molecules from 180 to 220 °C.…”

Section: ■ Results and Discussionsupporting

confidence: 71%

“…The higher DBE suggested that the most abundant compounds in the HCAPs became more unsaturated and formed more condensed aromatics. 53 The broader range of C numbers showed that the HCAPs contained more aliphatic/alicyclic compounds. 60 The degree of unsaturation and hydrophilicity/hydrophobicity of the HCAPs was analyzed by plotting DBE against NOSC (Figure S5).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Small amounts of total phenolic acid and polyaromatic substances in the HCAPs were found to promote the growth of the root system of plants and facilitate the uptake of more N-containing components from the PCW system. 53 Thus, the N-containing components removed from surface water in the PCW were taken up by rice plants and accumulated in the rice grain (5.1−18.6%).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Efficient Disposal of the Aqueous Products of Wet Organic Waste Hydrothermal Carbonization by Paddy Constructed Wetlands

Wang

Miao

et al. 2022

ACS EST Eng.

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The hydrothermal carbonization (HTC) technology has recently been broadly applied. However, disposal of the accompanying high-strength HTC aqueous products (HCAPs) largely determines the promotion and application of the HTC technology. The direct discharge of HCAPs might deteriorate the water environment, and previous studies have reported that HCAPs were insecurely removed via anaerobic fermentation or microalgae production. In this work, wet organic waste HCAPs were characterized and identified, and their removal efficiency in a paddy constructed wetland (PCW) was determined. The HCAPs were found to be rich in nutrients and mainly composed of humic acid (77.8−84.7%) or lignin (44.8−68.2%). With increasing HTC temperature, the relative humic acid content in HCAPs decreased by 4.4−6.4%, as determined by the three-dimensional fluorescence excitation−emission matrix (3D-EEM) analysis. HCAPs also underwent decomposition and polymerization due to the change in MW w and AI mod as determined by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) analysis. The PCW removal efficiency of NH 4 + -N and chemical oxygen demand (COD) reached 99.2 and 93.2% in the HCAP treatments, respectively, which were much higher than the values obtained for traditional disposal applications. On the basis of the higher soil NH 4 + -N content (1.6-to 6.0-fold), larger grain total nitrogen (TN) content (5.1−18.6%), and lower fluorescence intensity (5.7−88.2%), three primary processes (i.e., uptake by rice plants, microbial degradation, and soil immobilization) were proposed as PCW removal mechanisms. This study provides novel utilization prospects for the resource utilization of HCAPs in PCW systems.

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Section: ■ Results and Discussionsupporting

confidence: 71%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Efficient Disposal of the Aqueous Products of Wet Organic Waste Hydrothermal Carbonization by Paddy Constructed Wetlands

Wang

Miao

et al. 2022

ACS EST Eng.

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“…For example, some research studies picked out molecular formulas that were newly formed or removed to represent the transformations. 10,11 Molecular transformations could also be detected through changes in the average molecular weight 12 and oxidation state 13,14 of DOM molecules of the origin and daughter products. However, these characterization methods did not clarify the pairs of molecules in which specific transformations occurred.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Until recently, with the advent of high-resolution mass spectrometry, such as ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), it was possible to discern the chemical properties of DOM at the molecular level. − Using this technology, the molecular transformation could be investigated by comparing the molecular characteristics before and after a process. For example, some research studies picked out molecular formulas that were newly formed or removed to represent the transformations. , Molecular transformations could also be detected through changes in the average molecular weight and oxidation state , of DOM molecules of the origin and daughter products. However, these characterization methods did not clarify the pairs of molecules in which specific transformations occurred.…”

Section: Introductionmentioning

confidence: 99%

Using Potential Molecular Transformation To Understand the Molecular Trade-Offs in Soil Dissolved Organic Matter

et al. 2022

Environ. Sci. Technol.

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Understanding the chemical composition and molecular transformation in soil dissolved organic matter (DOM) is important to the global carbon cycle. To address this issue, ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) was applied to investigate DOM molecules in 36 paddy soils collected from subtropical China. All the detected 7576 unique molecules were divided into seven compound groups, and nine trade-off relationships between different compound groups were revealed based on principal component analysis and Pearson’s correlation. An optimized method was developed to evaluate all potential molecular transformations in DOM samples. The concept of thermodynamics was introduced to evaluate the identified molecular transformations and classify them as thermodynamically favorable (TFP) and thermodynamically limited (TLP) processes. Here, we first tried to understand the molecular trade-offs by using the potential molecular transformations. All the nine trade-offs could be explained by molecular transformations. Six trade-offs had bases of biochemical reactions, and the trade-off-related direct transformations could explain the content variations of carbohydrate-like, condensed aromatic-like, tannin-like, and lignin-like compounds in TLP. More reasonable explanations existed in the TLP rather than TFP, which demonstrated the critical role of external energy in the molecular transformation of soil DOM.

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Rhizosphere Effect on Physicochemical Properties and Immobilization Performance of Biochar

Wang

Liu

Zhou

et al. 2022

Water Air Soil Pollut

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Insights into the molecular transformation in the dissolved organic compounds of agro-waste-hydrochars by microbial-aging using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry

Cited by 19 publications

References 48 publications

Efficient Disposal of the Aqueous Products of Wet Organic Waste Hydrothermal Carbonization by Paddy Constructed Wetlands

Efficient Disposal of the Aqueous Products of Wet Organic Waste Hydrothermal Carbonization by Paddy Constructed Wetlands

Using Potential Molecular Transformation To Understand the Molecular Trade-Offs in Soil Dissolved Organic Matter

Rhizosphere Effect on Physicochemical Properties and Immobilization Performance of Biochar

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