洛克沙胂在栉孔扇贝(Chlamys farreri)体内的富集与释放规律

选取海洋双壳贝类栉孔扇贝为目标生物，研究不同质量浓度（0 mg/L、0.2 mg/L、1 mg/L、5 mg/L、25 mg/L）的洛克沙胂暴露条件下，砷（As）在栉孔扇贝4种组织（肝胰腺、鳃、闭壳肌、外套膜）中的富集和释放规律。结果表明:（1）自然海域和在清洁海水中，栉孔扇贝4种组织中As含量排序均为鳃>肝胰腺>外套膜>闭壳肌。（2）富集过程中，As的组织含量排序为肝胰腺>鳃>外套膜>肌肉，释放过程中，As的组织平均释放率排序为鳃>肝胰腺>外套膜>闭壳肌。（3）洛克沙胂进入扇贝体内的主要途径为鳃的摄食和滤水作用，As在扇贝体内的主要富集靶点为肝胰腺、鳃和外套膜。（4）在本实验中，富集过程，As在扇贝体内的富集-转移/释放的平均周期为22 d；富集/释放过程，As在扇贝体内的富集-转移/释放的平均周期为15 d，共循环2个周期，然后扇贝As含量趋于稳定。

Biological accumulation and release of roxarsone in marine scallop (Chlamys farreri)

The marine bivalve scallop (Chlamys farreri) was selected as the target organism, and the roxarsone exposed experiments were carried out with the nominal concentrations of 0 mg/L、0.2 mg/L、1 mg/L、5 mg/L、25 mg/L.The biological accumulation and release of arsenic (As) in hepatopancreas, gill, muscle, and mantle were studied.Results showed that:(1) Both in the natural sea and the clean seawater, the sequence of As content in the four tissues was gill > hepatopancreas > mantle > muscle.(2) During the bioaccumulation, the sequence of As content in the tissues was hepatopancreas > gill > mantle > muscle.And during the release, the sequence of the As release rate was gill > hepatopancreas > mantle > muscle.(3) The main pathway for roxarsone entering C.farreri was the ingestion and filter effects of gills.And the main target tissues of As bioaccumulation in C.farreri were hepatopancreas, gill, and mantle.(4) In the present study, the average period of bioaccumulation and release of As in C.farreri was 22 days in the bioaccumulation experiments, and 15 days in the release experiments.And meanwhile, there were 2 cycles in the release experiments and then the As content in the scallops tend to be stable.