Spectroscopic characteristics of dissolved organic matter from aquaculture wastewater and its interaction mechanism to chlorinated phenol compound

Abstract

In present study, the characteristics of dissolved organic matter (DOM) from aquaculture wastewater and its interaction to 4-chlorophenol (4-CP) was evaluated via a spectroscopic approach. According to EEM-PARAFAC analysis, two components were derived from the interaction samples between DOM and 4-CP, including humic-like and fulvic-like substances for component 1 and protein-like substances for component 2, respectively. The fluorescence intensity scores of two PARAFAC-derived components decreased with increasing 4-CP concentration. Synchronous fluorescence coupled to two-dimensional correlation spectroscopy (2D-COS) implied that DOM fractions quenched different degrees and occurred in the order of fulvic-like and humic-like fractions > protein-like fraction. Moreover, the quenching mechanisms were mainly caused by static quenching process. It was also found from Fourier transform infrared spectroscopy that the main functional groups for interaction between 4-CP and DOM were OH stretching and C=O stretching vibration. The obtained results provided a spectroscopic approach for characterizing the interaction between organic pollutant and DOM from aquaculture wastewater.

Characterizing Properties and Environmental Behaviors of Dissolved Organic Matter Using Two-Dimensional Correlation Spectroscopic Analysis

“…This work provided a comprehensive view of the structural changes of DOM during binding with long-chain ionic liquids . The interaction between DOM and 4-chlorophenol was investigated using fluorescence EEM–PARAFAC coupled with 2DCOS, and sequential quenching of DOM fractions during the interaction process was observed . With 2DCOS analysis, the production and structural variation of DOM in an aerobic granular sludge system under the stress of 2,4-dichlorophenol was evaluated, and fluorescence 2DCOS showed a potential application in the released DOM assessment in the exposure of toxic compounds in wastewater treatment .…”

Potential of valuable materials recovery from aquaculture wastewater: An introduction to resource reclamation

“…Most of the consumed water in aquaculture industries is released as wastewater (Sato et al, 2013). Whether fresh, brackish or marine water, utilized water discharged as wastewater contributes to environmental pollution because the effluents have high amount of organic materials, nutrients and organisms (Huang et al, 2018). Different cultivated species and cultivation systems will result in different amounts and characteristics of generated wastewater (Bregnballe, 2015; Hussan et al, 2019).…”

“…The abundant amount of generated wastewater from aquaculture industries is a global concern because it also contains a high concentration of organic materials, nutrients and living organisms, such as algae and plankton (Emerenciano et al, 2017; Huang et al, 2018, 2019). The high concentrations of BOD, COD and nutrients are major concern in terms of pollution to the water bodies when the effluent is discharged into the environment (He et al, 2009; Mohedano et al, 2012; Oladoja et al, 2015).…”

“…This industry produces an abundant amount of wastewater as a result of the massive consumption of water. The wastewater produced from this industry has characteristics of high biological oxygen demand (BOD), chemical oxygen demand (COD), protein, nitrogen (N) and phosphorus (P) (Hamid et al, 2014; Huang et al, 2018). High organic characteristics come from the food pellets leftover, fish faeces and dead bodies of organisms (Erondu & Anyanwu, 2005), while protein come from the utilization of hormones or supplements to enhance the productivity of the commodities (Huang et al, 2019).…”

Fluorescent characteristics of dissolved organic matter released from biochar and paddy soil incorporated with biochar

“…17 In addition, excitation-emission matrix (EEM) uorescence combined with a parallel factor analysis (PARAFAC) was also employed to identify the DOM components based on the excitation and emission (Ex/Em) maxima. [18][19][20][21] Overwhelmingly, PARAFAC modelling could collect several independent uorophore groups that expressed similar uorescence features from their lapped mixture of the EEM spectra and offer specic information of samples. 22 Hence, EEM-PARAFAC was accepted as a powerful and sensitive technique in characterizing the DOM composition in freshwater, soil and organic materials.…”