Landfill leachate treatment in-depth by bio-chemical strategy: microbial activation and catalytic ozonation mechanism

Yuan, Yuchen; Liu, Jiadong; Gao, Bo

doi:10.1016/j.cej.2022.136464

Cited by 29 publications

(4 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the O 3 consumption of the UV/O 3 process was significantly larger than that of the O 3 process (Figures S4 and S5) under the same O 3 dosage, which generated an abundance of • OH and facilitated the removal of organic matter. In general, the O 3 and UV/O 3 processes could effectively remove organic matter in the FNFC, and they preferred to react with aromatic organics, which was supported by the UV–vis spectroscopy and three-dimensional excitation emission matrix (3D-EEM) results (Figures S6–S15) and was also consistent with previous studies. , …”

Section: Resultssupporting

confidence: 89%

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O₃ and UV/O₃ Processes

Chen,

Gu,

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

Both ozone (O 3 ) and UV/O 3 treatment processes can effectively remove organic matter in the flocculated membrane filtration concentrate from landfill leachate, but the ozonation byproducts (OBPs) generated in the processes remain unknown. Using electrospray ionization-coupled Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS), this study investigated the molecular characteristics of unknown OBPs and their formation mechanisms during the treatment of flocculated nanofiltration concentrate (FNFC) using the O 3 and UV/O 3 processes. The results showed that after being treated by the O 3 and UV/O 3 processes, the average value of the oxygen-tocarbon ratio (O/C avg ) in the FNFC organic matter increased substantially from 0.49 to 0.61−0.64 and 0.63−0.71, respectively, with an O 3 dosage of 13.4−54.4 mg/min. The main OBPs were CHO and CHON compounds, which were mainly produced through oxygenation (+O 2 /+O 3 and −H 2 +O 2 ), oxidative deamination (−NH 3 +O 2 ), decyclopropyl (−C 3 H 4 ), and deisopropyl (−C 3 H 6 ) reactions. The hydroxyl radical ( • OH) can intensify these reactions, resulting in an abundance of OBPs with a high oxidation degree and low molecular weight. OBPs at five m/z values were fragmented and analyzed with tandem mass spectrometry, and abundant hydroxyl groups, carboxyl groups, and carbonyl groups were tentatively identified, presenting a potential toxicity to aquatic organisms. Due to the high molecular diversity of the OBPs in FNFC, their lower ΔG Cox o compared to natural fulvic acid, and potential toxicity, their impact on the water environment should be given more attention.

show abstract

Section: Resultssupporting

confidence: 89%

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O₃ and UV/O₃ Processes

Chen,

Gu,

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…One of the primary limitations of MFC technology is the high power supply voltage and energy consumption, as reported by Fernandes et al in 2015 . Luckily, different power sources like solar, wind, and biomass energy, as pointed out by Nie et al ( 2020 ), Yuan et al ( 2022 ), and Jeon et al ( 2016 ), generated higher power output than MFCs. The integration of MFCs with alternative energy sources such as solar, wind, and biomass energy holds the potential to curtail energy expenditures.…”

Section: Problems and Future Prospectsmentioning

confidence: 99%

Utilization of microbial fuel cells as a dual approach for landfill leachate treatment and power production: a review

Ishaq,

Said,

Azman

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

Landfill leachate, which is a complicated organic sewage water, presents substantial dangers to human health and the environment if not properly handled. Electrochemical technology has arisen as a promising strategy for effectively mitigating contaminants in landfill leachate. In this comprehensive review, we explore various theoretical and practical aspects of methods for treating landfill leachate. This exploration includes examining their performance, mechanisms, applications, associated challenges, existing issues, and potential strategies for enhancement, particularly in terms of cost-effectiveness. In addition, this critique provides a comparative investigation between these treatment approaches and the utilization of diverse kinds of microbial fuel cells (MFCs) in terms of their effectiveness in treating landfill leachate and generating power. The examination of these technologies also extends to their use in diverse global contexts, providing insights into operational parameters and regional variations. This extensive assessment serves the primary goal of assisting researchers in understanding the optimal methods for treating landfill leachate and comparing them to different types of MFCs. It offers a valuable resource for the large-scale design and implementation of processes that ensure both the safe treatment of landfill leachate and the generation of electricity. The review not only provides an overview of the current state of landfill leachate treatment but also identifies key challenges and sets the stage for future research directions, ultimately contributing to more sustainable and effective solutions in the management of this critical environmental issue.

show abstract

“…Some studies assessed ratios between peaks and compared them across different MBRs or streams to assess the changes in composition [31], as well as calculate removal percentages related to identifiable peaks (protein-like, humic-like, and microbial-derived peaks) [12]. Other studies involved more calculations, such as the estimation of fluorescence regional integration (FRI), and used 2D fluorescence to quantify differences of dissolved organic matter within different samples [32][33][34][35][36]. EEMs with FRI were used to characterize different EPS extracts obtained from membrane backwash (using different solutions) when characterizing MBRs for the treatment of an industrial wastewater [35].…”

Section: Use Of 2d Fluorescence Spectroscopy To Characterize Mbr Systemsmentioning

confidence: 99%

Development and Implementation of MBR Monitoring: Use of 2D Fluorescence Spectroscopy

Galinha

Crespo

2022

Membranes

View full text Add to dashboard Cite

The monitoring of a membrane bioreactor (MBR) requires the assessment of both biological and membrane performance. Additionally, the development of membrane fouling and the requirements for frequent membrane cleaning are still major concerns during MBR operation, requiring tight monitoring and system characterization. Transmembrane pressure is usually monitored online and allows following the evolution of membrane performance. However, it does not allow distinguishing the fouling mechanisms occurring in the system or predicting the future behavior of the membrane. The assessment of the biological medium requires manual sampling, and the analyses involve several steps that are labor-intensive, with low temporal resolution, preventing real-time monitoring. Two-dimensional fluorescence spectroscopy is a comprehensive technique, able to assess the system status at real-time without disturbing the biological system. It provides large sets of data (system fingerprints) from which meaningful information can be extracted. Nevertheless, mathematical data analysis (such as machine learning) is essential to properly extract the information contained in fluorescence spectra and correlate it with operating and performance parameters. The potential of 2D fluorescence spectroscopy as a process monitoring tool for MBRs is, therefore, discussed in the present work in view of the actual knowledge and the authors’ own experience in this field.

show abstract

Landfill leachate treatment in-depth by bio-chemical strategy: microbial activation and catalytic ozonation mechanism

Cited by 29 publications

References 69 publications

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O₃ and UV/O₃ Processes

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O₃ and UV/O₃ Processes

Utilization of microbial fuel cells as a dual approach for landfill leachate treatment and power production: a review

Development and Implementation of MBR Monitoring: Use of 2D Fluorescence Spectroscopy

Contact Info

Product

Resources

About

Landfill leachate treatment in-depth by bio-chemical strategy: microbial activation and catalytic ozonation mechanism

Cited by 29 publications

References 69 publications

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O3 and UV/O3 Processes

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O3 and UV/O3 Processes

Utilization of microbial fuel cells as a dual approach for landfill leachate treatment and power production: a review

Development and Implementation of MBR Monitoring: Use of 2D Fluorescence Spectroscopy

Contact Info

Product

Resources

About

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O₃ and UV/O₃ Processes

Molecular Characteristics and Formation Mechanisms of Unknown Ozonation Byproducts during the Treatment of Flocculated Nanofiltration Leachate Concentrates Using O₃ and UV/O₃ Processes