Rippey Brian, Rose Neil, Yang Handong, Harrad Stuart, Robson Mat, Travers Sarah
School of Environmental Sciences, University of Ulster, Cromore Road, Coleraine, Northern Ireland BT52 1SA, UK.
Environ Int. 2008 Apr;34(3):345-56. doi: 10.1016/j.envint.2007.03.006. Epub 2007 Apr 30.
A Tier I Sediment Ecological Risk Assessment of profundal lake sediment contaminated by diffuse pollution of heavy metals and POPs deposited from the atmosphere was completed. The concentrations of seven heavy metals and four groups of POPs (OCs, PCBs, PAHs, PBDEs) were determined in the profundal sediment of ten lakes in the United Kingdom and two sediment toxicity tests completed (chironomid survival and emergence and cladoceran survival and reproduction). The results showed that around half the lakes are at least moderately contaminated by Pb, Zn, Cd, As and PAHs deposited from the atmosphere and the toxicity quotient suggests that the contaminants of concern are Pb, As and PAHs, and not the other metals nor OCs and PCBs. There was toxicity in the sediment of four of the lakes. The Probable Effect Concentration Quotient values indicated that metals in the sediments of Scoat Tarn, Agden Reservoir and Llyn Llagi were likely to be responsible for the laboratory toxicity found in these lakes, with PAHs also contributing in Agden Reservoir.
完成了对因大气中重金属和持久性有机污染物的扩散污染而受污染的深水湖沉积物的一级沉积物生态风险评估。测定了英国十个湖泊深水沉积物中七种重金属和四类持久性有机污染物（有机氯化合物、多氯联苯、多环芳烃、多溴二苯醚）的浓度，并完成了两项沉积物毒性试验（摇蚊的存活与羽化以及枝角类动物的存活与繁殖）。结果表明，约一半的湖泊受到大气中沉积的铅、锌、镉、砷和多环芳烃的至少中度污染，毒性商表明，所关注的污染物是铅、砷和多环芳烃，而非其他金属以及有机氯化合物和多氯联苯。四个湖泊的沉积物存在毒性。可能效应浓度商值表明，斯卡特湖、阿格登水库和利恩拉吉湖沉积物中的金属可能是这些湖泊中发现的实验室毒性的原因，多环芳烃在阿格登水库中也有影响。
