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Adsorption of soluble microbial products by sediments
Adsorption of soluble microbial products by sediments
- Source :
- Ecotoxicology and Environmental Safety. 169:874-880
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- As major precursors of disinfection by-products (DBPs), soluble microbial products (SMPs) generated by sewage discharge can adversely affect drinking water quality. It is essential to understand the adsorption behaviours of SMPs onto sediments and the effect of DBPs formation. In this study, the adsorption ability of sediments was evaluated by adsorption isotherms with respect to temperature and salinity. Adsorption behaviours were investigated using X-ray photoelectron spectroscopy, electron microscopy analysis, and excitation emission matrix fluorescence analysis. Chlorination was also employed to explore the influence of sediment adsorption on drinking water quality. The results indicated that the maximum adsorption potential of sediments to SMPs was 1.60 mg/g, which involved exothermic processes. SMPs adsorption declined with increasing temperature and salinity, and fulvic acid and protein in SMPs were more readily adsorbed on sediments than was humic acid. Correlation analysis results indicated that adsorption behaviours of sediments to SMPs could significantly reduce the generation potential of DBPs (r = 0.882-0.938, p 0.01). In addition, the decrease of C-DBPs was considerably greater than that of N-DBPs. These research findings are of importance to assessments of the fate and transport of SMPs in water-sediment systems, as well as the effect of following DBPs formation in the drinking water supply.
- Subjects :
- Geologic Sediments
Halogenation
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
Temperature salinity diagrams
02 engineering and technology
010501 environmental sciences
01 natural sciences
Water Purification
Adsorption
X-ray photoelectron spectroscopy
Water Supply
Water Quality
Humic acid
Benzopyrans
Humic Substances
0105 earth and related environmental sciences
chemistry.chemical_classification
Excitation emission matrix
021110 strategic, defence & security studies
Sewage
Drinking Water
Public Health, Environmental and Occupational Health
Proteins
Sediment
General Medicine
Pollution
Disinfection
chemistry
Environmental chemistry
Correlation analysis
Water quality
Water Pollutants, Chemical
Disinfectants
Subjects
Details
- ISSN :
- 01476513
- Volume :
- 169
- Database :
- OpenAIRE
- Journal :
- Ecotoxicology and Environmental Safety
- Accession number :
- edsair.doi.dedup.....65f129cd25f187bc011d5289b54dee8d
- Full Text :
- https://doi.org/10.1016/j.ecoenv.2018.11.005