Removal of γ-HCH, 1,4-Dichlorobenzene and trichloromethane from air via the adsorption of snow
| Autor: | Chunli Kang, Wang Nan, Tao Tian, Hanfei Liu, Wang Yuhan, Xiao Kunkun |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Pollutant
Atmospheric Science 010504 meteorology & atmospheric sciences 010501 environmental sciences Snow 01 natural sciences Inorganic salts chemistry.chemical_compound Adsorption Adsorption kinetics 1 4-Dichlorobenzene chemistry Kinetic equations Environmental chemistry 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Atmospheric Environment. 213:377-383 |
| ISSN: | 1352-2310 |
| DOI: | 10.1016/j.atmosenv.2019.06.012 |
| Popis: | Snow is an important reservoir of volatile and semi-volatile organic compounds. In this paper, the adsorption kinetics and thermodynamics of gamma-hexachlorocyclohexane (γ-HCH) and other two kinds of important pollutants in the environment, 1,4-Dichlorobenzene (p-DCB) and trichloromethane (TCM), were investigated by the adsorption experiment. The results suggest that γ-HCH adsorption capacity on snow is much higher than that of p-DCB and TCM. The adsorption kinetics of the three pollutants fit the pseudo-second-order kinetic equation, and their adsorption thermodynamics accord with Henry's linear adsorption model. The effect of common inorganic salts (Na2SO4, Na2CO3 and NaNO3) on adsorption was positive, the presence of inorganic salts promoted the adsorption of γ-HCH, p-DCB and TCM on the snow. The adsorption of γ-HCH on natural snow was at least 3.5 times greater than that on artificial snow. All the results indicate that snow in cold regions may be the significant reservoir of organic pollutants. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect