D. Hincapié–Upegui, D. Pemberthy Mendoza, G. A. Peñuela
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引用次数: 0
Abstract
In this study, the influence of climatic season, molecular weight distribution, and spectroscopic properties on the formation of disinfection by-products and the biodegradability of dissolved organic matter from a tropical high-mountain reservoir was examined. Samples were collected during dry and rainy seasons and then concentrated using solid-phase extraction, with recoveries of 36.84 and 46.38%, respectively. The samples exhibited differences in their molecular weight distribution, with values of molecular weight equal to 1523.13 ± 30.41 Da for dry season samples and 2482.70 ± 13.45 Da for rainy season samples. Subsequently, the samples were fractionated using liquid preparative high-pressure size exclusion chromatography and analyzed for their biodegradability and their potential for the formation of trihalomethanes and haloacetic acids. It was observed that biodegradability was higher for the fractions with lower chromophore content (r = − 0.3571) and higher polydispersity (r = 0.5357), indicating that fractions that were more polydisperse and had a lower molecular weight were more susceptible to biological degradation. Among the haloacetic acids, bromochloroacetic acid was the major component, comprising 42.80% to 68.69% of the total haloacetic acids. Correlation analysis revealed a positive correlation between total haloacetic acids and total trihalomethanes with dissolved organic matter chromophoric character (r = 0.5357 and r = 0.4643, respectively), as well as with molecular weight (r = 0.1429 and 0.0714, respectively).
期刊介绍：
International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management.
A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made.
The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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