含有金属混合物的可沉降大气颗粒物(SeAPM),包括金属纳米颗粒,在世界各地都有所增加,并造成环境和生物群污染。在暴露于1gL-1SeAPM的30天期间,评估了尼罗罗非鱼(Oreochromisniloticus)中的金属生物富集模式,并根据估计的每日摄入量(EDI)评估了食用鱼片(肌肉)的人类健康风险。SeAPM是在维托里亚市的一个铁矿石加工和钢铁工业综合体周围收集的(圣埃斯皮里托,巴西)区域。每天收集水样进行理化分析,每3天进行多元素分析。每3天测定鱼的内脏和鱼片中的金属生物浓度。元素B,Al,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Se,Rb,Sr,Ag,Cd,Pb,Hg,Ba,Bi,W,Ti,Zr,Y,La,Nb,和Ce在SeAPM中进行了分析,水,和鱼使用电感耦合等离子体质谱法。受SeAPM污染的水中的金属浓度高于对照水中的金属浓度。大多数金属优先在鱼类内脏中生物浓缩,除了Hg和Rb,主要在鱼片中生物浓缩。内脏中的生物富集模式为Fe>Al>Mn>Pb>V>La>Ce>Y>Ni>Se>As>W>Bi;在整个30天的暴露中,它高于对照组。Ti,Zr,Nb,Rb,Cd,Hg,B,和Cr表现出不同的生物富集模式。Zn,Cu,Sr,Sn,Ag,Ta与对照组没有差异。金属生物浓度的差异归因于水中不同的金属生物利用度以及鱼类应对每种金属的不同方式,包括低效的排泄机制。EDI计算表明,食用所研究的鱼对儿童不安全,因为As的浓度,La,Zr,汞超过了世界卫生组织对这些元素的每日可接受摄入量。
Settleable atmospheric particulate matter (SeAPM) containing a mixture of metals, including metallic nanoparticles, has increased throughout the world, and caused environmental and biota contamination. The metal bioconcentration pattern in Nile tilapia (Oreochromis niloticus) was evaluated during a 30-day exposure to 1 g L-1 SeAPM and assessed the human health risk from consuming fish fillets (muscle) based on the estimated daily intake (EDI). SeAPM was collected surrounding an iron ore processing and steel industrial complex in Vitória city (Espírito Santo, Brazil) area. Water samples were collected daily for physicochemical analyses, and every 3 days for multi-elemental analyses. Metal bioconcentrations were determined in the viscera and fillet of fish every 3 days. The elements B, Al, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Rb, Sr, Ag, Cd, Pb, Hg, Ba, Bi, W, Ti, Zr, Y, La, Nb, and Ce were analyzed in SeAPM, water, and fish using inductively coupled plasma mass spectrometry. The metal concentration in SeAPM-contaminated water was higher than in control water. Most metals bioconcentrated preferentially in the fish viscera, except for the Hg and Rb, which bioconcentrated mostly in the fillet. The bioconcentration pattern was Fe > Al > Mn > Pb > V > La > Ce > Y > Ni > Se > As > W > Bi in the viscera; it was higher than the controls throughout the 30-day exposure. Ti, Zr, Nb, Rb, Cd, Hg, B, and Cr showed different bioconcentration patterns. The Zn, Cu, Sr, Sn, Ag, and Ta did not differ from controls. The differences in metal bioconcentration were attributed to diverse metal bioavailability in water and the dissimilar ways fish can cope with each metal, including inefficient excretion mechanisms. The EDI calculation indicated that the consumption of the studied fish is not safe for children, because the concentrations of As, La, Zr, and Hg exceed the World Health Organization\'s acceptable daily intake for these elements.