NDLI: Simulating the transfer and fate of hexachlorocyclohexane in recent 50 years in Beijing, China

Content Provider	Springer Nature Link
Author	Cao, Hongying Liang, Tao Tao, Shu
Copyright Year	2005
Abstract	Taking Beijing as a study area, a dynamic fugacity model was used to simulate the transfer and fate of technical HCHs according to the physic-chemical properties of the studying environment and HCH isomers. Dynamic changes of the transfer fluxes and concentrations of HCH isomers during 1952-2003 were simulated and the model results suggest good agreement between the calculated and measured concentrations of HCH isomers. During 1952-1983, the average input and output amount of HCHs through agricultural application and degradation are 130 t and 150 t respectively. The dominant transfer processes of HCHs in the study area are air-soil deposition, soil erosion and soil-air diffusion, transfer fluxes of these processes are 80 t⋅a$^{−1}$, 16 t⋅a$^{−1}$ and 11 t⋅a$^{−1}$, which account for 92% of total transfer fluxes of HCHs isomers. There were approximately 253t HCHs in all environmental compartments of the study area during this period and 97% of which existed in soil compartment. Air and water advection became the dominant input sources of HCHs after 1984 when the application of technical HCHs was prohibited, concentration of HCHs quickly descended to a quite low level in several years. Total amount of HCHs isomers remaining in the study area environment now is less than 5% that before 1983, and this percentage may descend to 0.5% after 20 years by prediction.
Starting Page	2203
Ending Page	2213
Page Count	11
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	48
Issue Number	12
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	2005-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	fugacity model hexachlorocyclohexane compartment transfer flux fate Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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