Insight into binding characteristics of copper(II) with water-soluble organic matter emitted from biomass burning at various pH values using EEM–PARAFAC and two-dimensional correlation spectroscopy analysis

Fan, Xingjun; Liu, Chao; Yu, Xufang; Wang, Yan; Song, Jianzhong; Xiao, Xin; Meng, Fanwei; Cai, Yongfeng; Ji, Wenchao; Xie, Yue; Peng, Ping’an

doi:10.1016/j.chemosphere.2021.130439

Cited by 23 publications

(4 citation statements)

References 62 publications

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“…For the HPO fraction, five dominant correlation peaks at coordinates ∼832, 999, 1374, 1625, and 1666 cm −1 exhibited pronounced responses under Cu(II) perturbation, indicating that aryl υ C−H , polysaccharide υ C−O , aliphatic δ C−H , aryl υ C�C , and carboxyl ν C�O were the main binding sites. 13,41 Moreover, the sharp transitions in the conformations of the HPO fraction occurred at critical Cu(II) concentrations of 20 and 120 μM. This observation was consistent with the results of UV/FTIR hetero-2DCoS analysis showing that these functional groups in the HPO fraction coordinated with Cu(II) before the chromophoric groups.…”

Section: D-ftir-cos Revealssupporting

confidence: 87%

“…The factors affecting Cu(II) binding in specific ecosystems ought to be confined to the inherent properties of dissolved organic matter (DOM), although the pH and ionic strength can also affect binding processes. , Therefore, the composition and sources of COM in algae-laden water are the major factors affecting binding behaviors. , Several organic functional groups, such as amide, carboxyl, phenol, quinone, and hydroxyl groups, in COM can act as active sites for metal binding via chelation or complexation, although carboxylic and phenolic groups are generally recognized as the dominant metal-binding sites. , …”

Section: Introductionmentioning

confidence: 99%

“…11,12 Therefore, the composition and sources of COM in algae-laden water are the major factors affecting binding behaviors. 13,14 Several organic functional groups, such as amide, carboxyl, phenol, quinone, and hydroxyl groups, in COM can act as active sites for metal binding via chelation or complexation, although carboxylic and phenolic groups are generally recognized as the dominant metal-binding sites. 15,16 Approaches for studying the metal-binding characteristics of organic ligands are diverse.…”

Section: ■ Introductionmentioning

confidence: 99%

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Complexation of Copper Algicide and Cellular Organic Matter: Implications for Its Fate in Algae-Laden Surface Waters

et al. 2023

ACS EST Water

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Copper-based algicides have been widely used to suppress cyanobacterial biomass. Constrained by the heterogeneous characteristics of cellular organic matter (COM) in aquatic ecosystems, little information on the Cu(II) binding of different COM subfractions has been obtained. In this study, the original COM solution was divided into four fractions, the hydrophobic (HPO), transphilic (TPI), charged hydrophilic (CHPI), and neutral hydrophilic (NHPI) fractions, via resin-mediated fractionation. A comprehensive methodology that integrates two-dimensional correlation spectroscopy (2DCoS), hetero-2DCoS, and moving-window 2DCoS analysis was used to identify the binding sites and binding sequence of COM subfractions in response to Cu(II) perturbation. The most sensitive groups in the HPO, TPI, CHPI, and NHPI fractions were aryl υC–H, aliphatic δC–H, amide II υC–N, and polysaccharide νC–O, respectively. Each subfraction could interact with Cu(II) through diverse functional moieties, and carboxylic, aliphatic, aryl, and phenolic groups were the basic units of COM chromophores. The functional groups could coordinate with Cu(II) when it was present at both trace and high concentrations, but the abundance of functional groups varied significantly among COM subfractions and even chromophores. These findings enhance our understanding of the molecular characteristics of Cu(II) complexes and the environmental fates of metal–organic complexes in aquatic systems.

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Section: D-ftir-cos Revealssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Complexation of Copper Algicide and Cellular Organic Matter: Implications for Its Fate in Algae-Laden Surface Waters

et al. 2023

ACS EST Water

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“…One component (C1) showed a resemblance to the protein-like fluorescence, with its features matching to tryptophan-like. The other two components, C2 and C3, represent the fulvic-like and humic-like fluorescence, respectively [ 39 , 40 , 41 , 42 , 43 , 44 ]. The distribution of fluorescence components in the SMP and EPS from different units of bioreactors is presented in Figure 4 .…”

Section: Resultsmentioning

confidence: 99%

In-Situ Sludge Reduction in Membrane-Controlled Anoxic-Oxic-Anoxic Bioreactor: Performance and Mechanism

Maqbool

Kang

et al. 2022

Membranes

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Conventional and advanced biological wastewater treatment systems generate excess sludge, which causes socio-economic and environmental issues. This study investigated the performance of membrane-controlled anoxic-oxic-anoxic (AOA) bioreactors for in-situ sludge reduction compared to the conventional anoxic-oxic-oxic membrane bioreactor (MBRcontrol). The membrane units in the AOA bioreactors were operated as anoxic reactors at lower sludge recirculation rates to achieve hydrolysis of extracellular polymeric substances (EPS) and extensive endogenous respiration. Compared to MBRcontrol, the AOA bioreactors operated with 90%, and 80% recirculation rates reduced the sludge growth up to 19% and 30%, respectively. Protein-like components were enriched in AOA bioreactors while fulvic-like components were dominant in MBRcontrol. The growth of Dechloromonas and Zoogloea genra was promoted in AOA bioreactors and thus sludge reduction was facilitated. Metagenomics analysis uncovered that AOA bioreactors exhibited higher proportions of key genes encoding enzymes involved in the glycolysis and denitrification processes, which contributed to the utilization of carbon sources and nitrogen consumption and thus sludge reduction.

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Comprehensive evaluation of spent mushroom substrate-chicken manure co-composting by garden waste improvement: physicochemical properties, humification process, and the spectral characteristics of dissolved organic matter

Jia

Huang

Chen

et al. 2022

Environ Sci Pollut Res

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Insight into binding characteristics of copper(II) with water-soluble organic matter emitted from biomass burning at various pH values using EEM–PARAFAC and two-dimensional correlation spectroscopy analysis

Cited by 23 publications

References 62 publications

Complexation of Copper Algicide and Cellular Organic Matter: Implications for Its Fate in Algae-Laden Surface Waters

Complexation of Copper Algicide and Cellular Organic Matter: Implications for Its Fate in Algae-Laden Surface Waters

In-Situ Sludge Reduction in Membrane-Controlled Anoxic-Oxic-Anoxic Bioreactor: Performance and Mechanism

Comprehensive evaluation of spent mushroom substrate-chicken manure co-composting by garden waste improvement: physicochemical properties, humification process, and the spectral characteristics of dissolved organic matter

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