PAHs concentration in mussels in La Spezia Gulf from 2019 to2023

mussels were sampled on seven monitoring stations in areas used as bivalve molluscs (mytilus galloprovincialis) production in la spezia gulf (italy) during 2019-2023. in the portovenere bay there are 2 zones named as port1 and palm3; meanwhile in the outer dam there are 5 zones named dfpi5 dfci6, dfli7, dfle8 and dfpe9. for each monitoring station, mussels were collected grouped in different points and, moreover, at three levels of depth (on the bottom, in the centre and at 50 cm from the surface), to obtain an aliquot of about 2–3 kg for each point. for the chemical analysis, the sampling rate is six-monthly during all the year. during all the period investigated pahs concentration was monitored. in particular, the chemical analysis was focused on the detection of the benzo[a]pyrene, chrysene, benz[a]anthracene and benzo[b]fluoranthene, hereinafter bap, chr, baa and bbf. data are here presented as averages by years.

在2019至2023年间，对意大利拉斯佩齐亚湾用于双壳贝类（如地中海贻贝）养殖区的七个监测站点进行了贻贝的采样。在波尔托韦内雷湾内，设有两个区域，分别命名为port1和palm3；而在外堤区域，则分布着五个区域，依次命名为dfpi5、dfci6、dfli7、dfle8和dfpe9。在每个监测站点，贻贝的采集分为不同点位，并在底部、中部以及距离水面50厘米的三个不同深度层进行，以获取每个点位约2至3公斤的样本。化学分析采用全年六个月一次的采样频率。在整个研究期间，持续监测了多环芳烃（PAHs）的浓度。特别地，化学分析的重点在于检测苯并[a]芘、苯并芘、苯并[a]蒽和苯并[b]荧蒽，简称Bap、Chr、Baa和Bbf。数据以年度平均值的形式呈现。