THE IN-VITRO INFLUENCE OF THE BURROWING POLYCHAETE NEREIS-DIVERSICOLOR ON THE FATE OF PETROLEUM-HYDROCARBONS IN MARINE-SEDIMENTS

被引:54
作者
GILBERT, F [1 ]
RIVET, L [1 ]
BERTRAND, JC [1 ]
机构
[1] LAB CHIM ANAL ENVIRONN,CNRS,URA 1049,F-13397 MARSEILLE 20,FRANCE
关键词
D O I
10.1016/0045-6535(94)90084-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The in vitro fate of the saturated hydrocarbon fraction (SF) of Arabian Light crude oil has been studied in PVC cores filled with a coastal marine sediment defaunated by sieving. Experiments were conducted in absence or presence of polychaetes Nereis diversicolor. The luminophore tracer technique was used to quantify the mixing of sediment by worms. Presence of crude oil reduced the building of burrows by polychaetes. This work demonstrates the ability of infaunal organisms to stimulate both downard and outward transfers of hydrocarbons from sediment reservoirs. In non-bioturbated sediment hydrocarbons were confined to the sediment surface. Introduction of polychaetes in sediment (1) induced the burying of SF in sediment (2.5 % and 13.5 % of the initial surface input after 15 and 45 days, respectively); (2) enhanced the exportation of SF in the overlying water (plus 59 % and 23.5 % compared to defaunated control sediment after 15 and 45 days, respectively). Buried hydrocarbons were submitted to biodegradation, from 2 cm to 10 cm depth in polychaete burrows, after 45 days.
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页码:1 / 12
页数:12
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