期刊
ENVIRONMENTAL POLLUTION
卷 159, 期 10, 页码 2301-2309出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2011.05.011
关键词
Persistent organic pollutants (POPs); Regional dynamics; Inter-compartmental flux; Biological effect; Pearl River Delta
资金
- National Natural Science Foundation of China [40821003, 40588001, 40928003]
- K.C. Wong Education Foundation, Hong Kong, China
The mass transport budgets of 1,1,1-trichloro-2,2-bis(chlorophenyl)ethane (p,p'-DDT) and decabromodiphenyl ether (BDE-209) in the Pearl River Delta, South China were calculated based on previously collected data. Residual p,p'-DDT, mostly related to historical use, has largely settled into soil (780,000 kg), while the soil BDE-209 inventory (44,000 kg) is considerably smaller. Conversely, large amounts of BDE-209 currently used in numerous commercial products have resulted in a much higher atmospheric depositional flux of BDE-209 (28,100 kg/yr) relative to p,p'-DDT (310 kg/yr). The soil inventory of p,p'-DDT is predicted to decrease to half of its current value after 22 years, and the percent area containing soil p,p'-DDT at levels exceeding the effects range medium (27 ng/g) will decrease from 40% to 20%. Finally, soil BDE-209 inventory will reach an equilibrium value of 940 tons in 60 years, when BDE-209 levels in 50% of soil will be above an equivalent risk guideline value (125 ng/g). (C) 2011 Elsevier Ltd. All rights reserved.
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