Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 431, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2022.128593
Keywords
Mercury; Dissolved organic matter (DOM); Ultrafiltration fraction; Parallel factor analysis (PARAFAC); Contaminate control
Categories
Funding
- National Key Research and Develop-ment Project [2019YFC1906403]
- China Postdoctoral Science Foundation [2021M700227]
- National Natural Science Foun-dation of China [51878132, 51978131]
Ask authors/readers for more resources
This study investigates the binding properties of dissolved organic matter (DOM) with contaminants, specifically focusing on metal contaminants in the environment. The results show that composting-derived DOM can strongly complex with Hg2+ ions, particularly those with a high humification degree. Furthermore, DOM ligands with a low humification degree exhibit a higher binding speed. These findings provide important theoretical support for environmental pollution control.
Dissolved organic matter (DOM) can strongly complex with various contaminants. Therefore, DOM was deemed as an environmentally friendly substance for controlling the mobility, bioavailability, speciation, toxicity, and fate of metal contaminants in environment. In this study, composting-derived DOM was categorized into three fractions based on different molecular weights (MWs). Furthermore, parallel faction analysis (PARAFAC), twodimensional correlation spectroscopy (2DCOS), and a complexation model were employed to reveal the contaminate-binding characterization. Two PARAFAC fluorescence components were identified in the MW < 1 kDa and the 1 kDa < MW < 5 kDa fractions, respectively. In the MW > 5 kDa fraction, three PARAFAC components were identified. Protein-like component C5 did not have the Hg2+-binding ability. Moreover, the results showed that not all the DOM ligands could bind with contaminants, but a high humification degree of composting DOM ligands could strongly bind Hg2+. In addition, DOM ligand with a low humification degree DOM ligands presented a higher Hg2+-binding speed. Subsequently, DOM from different MWs DOM could be applied separately to the different pollution forms. With these promising results, the different DOM ligand-Hg2+-binding properties were characterized to provide theoretical support for environmental pollution control.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available