Abstract
The sorption of tefluthrin was studied on “pure” clay minerals and those that had been coated with aquatic humic substances over a mass percent carbon range of 0.02 to 2.15. Tefluthrin sorption onto humic-coated minerals was significantly greater than on to the clean minerals and increased with increasing quantities of sorbed humic substances. Humic acid, the most aromatic coating, was the strongest sorbent, followed by fulvic acid, hydrophilic macromolecular acid and natural coatings on estuarine suspended particles. This shows the significant impact of humic coatings on the sorptive capacity of mineral particles. The sorption was linear, also consistent with the operation of a partition process. The partition coefficient normalised to organic carbon (Koc) after deduction of the contribution from the clean mineral, ranged from 120000 to 770000 and was highest for the most aromatic humic acid fraction.
| Original language | English |
|---|---|
| Pages (from-to) | 275-285 |
| Number of pages | 11 |
| Journal | International Journal of Environmental Analytical Chemistry |
| Volume | 58 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - Jan 1995 |
| Externally published | Yes |
Keywords
- clay minerals
- humic substances
- Pyrethroids
- sorption
- suspended particles
- tefluthrin
ASJC Scopus subject areas
- Analytical Chemistry
- Environmental Chemistry
- Water Science and Technology
- Waste Management and Disposal
- Soil Science
- Pollution
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis
