翡翠贻贝对多氯联苯吸收不同途径的比较研究

COMPARATIVE STUDIES ON UPTAKE WAY OF POLYCHLORINATED BIPHENYLS BY GREEN-LIPPED MUSSELS (PERNA VIRIDIS)

定量分析和比较翡翠贻贝Pernaviridis对多氯联苯(PCBs)吸收的4种不同途径。结果表明,翡翠贻贝通过食物途径富集PCBs比从海水吸收的途径具更高效率;而通过底泥或悬浮颗粒积累PCBs的途径较为次要。翡翠贻贝对5—7个氯原子数的PCBs异构体富集率高,分别占PCBs总量的53.25%—77.41%。结果还表明,贻贝经沉积物途径和经滤食悬浮颗粒途径比经水途径和食物途径对含2—4个氯原子数和8—10个氯原子数的PCBs异构体富集率较高。

Experiments were designed to expose greenlipped mussels, Perna viridisto different PCBcontaminated ambit in a short term in order to determine quantitatively the uptake of PCBs by different ways. The results showed that PCBs uptake from food was more importantandefficient than that from seawater, while the uptake directly from contaminated particles or sediments ingested bymussels was considered to be less important.In this bioaccumulation study, PCBs congeners in mussels were mainly pentra, tetra and heptachlorobiphenyls,accounting for 53.25%—77.41%of the total mussel PCBs load. The results also indicated that the uptakerates of di, tri, hexachlorobiphenyls and octa, nona, decachlorobiphenyls in mussels from sediments and suspended particulates were relatively higher than that from dissolved solutions and alge.