The potential effects of proposed lead-zinc mining in an ecologically sensitive area were assessed by studying a nearby mining district that has been exploited for about 30 yr under contemporary environmental regulations and with modern technology. Blood and liver samples representing fish of three species (largescale stoneroller, Campostoma oligolepis, n=91; longear sunfish, Lepomis megalotis, n=105; and northern hog sucker, Hypentelium nigricans, n=20) were collected from 16 sites representing a range of conditions relative to lead-zinc mining and ore beneficiation in southeastern Missouri. Samples were analyzed for lead, zinc, and cadmium, and for a suite of biomarkers (reported in a companion paper). A subset of the hog sucker (n=9) representing three sites were also analyzed for nickel and cobalt. Blood and liver lead concentrations were highly correlated (r=0.84-0.85, P<0.01) in all three species and were significantly (ANOVA, P<0.01) greater at sites <10 km downstream of active lead-zinc mines and mills and in a historical lead-zinc mining area than at reference sites, including a site in the area proposed for new mining. Correlations between blood and liver cadmium concentrations were less evident than for lead but were nevertheless statistically significant (r=0.26-0.69, P <0.01-0.07). Although blood and liver cadmium concentrations were highest in all three species at sites near mines, within-site variability was greater and mining-related trends were less evident than for lead. Blood and liver zinc concentrations were significantly correlated only in stoneroller (r=0.46, P<0.01) and mining-related trends were not evident. Concentrations of cobalt and nickel in blood and liver were significantly higher (ANOVA, P<0.01) at a site near an active mine than at a reference site and a site in the historical lead-zinc mining area. These findings confirm previous studies indicating that lead and other metals are released to streams from active lead-zinc mines and are available for uptake by aquatic organisms.

译文

:通过研究附近的一个矿区,评估了拟议的铅锌矿在生态敏感地区的潜在影响,该矿区已根据现代环境法规和现代技术进行了大约30年的开采。从代表范围的16个地点采集了代表三种鱼的血液和肝脏样本(大型石roll,桔小弯曲杆菌,n = 91;长尾sun鱼,巨足Lepomis megalotis; n = 105;北猪抽油者,黑pent鱼(nypentelium nigricans,n = 20)。密苏里州东南部铅锌矿开采和矿石选矿的相关条件分析了样品中的铅,锌和镉,以及一套生物标志物(在同行论文中报告)。还分析了代表三个位置的猪抽油器的一个子集(n = 9)中的镍和钴。在这三个物种中,血铅和肝铅的浓度高度相关(r = 0.84-0.85,P <0.01),并且在活跃的铅锌矿山和下游下游<10 km处以及铅锌矿的历史开采面积要比参考地点高,包括拟议中的新矿区。血液和肝镉浓度之间的相关性不及铅明显,但具有统计学意义(r = 0.26-0.69,P <0.01-0.07)。尽管在矿场附近的所有三个物种中,血液和肝脏镉的浓度最高,但与铅相比,场内变异性更大,与采矿相关的趋势也不太明显。血液和肝中锌的浓度仅在压石机中显着相关(r = 0.46,P <0.01),与采矿相关的趋势不明显。在活跃矿井附近的地点,血液和肝脏中钴和镍的浓度明显高于参考地点和历史铅锌矿区的地点(ANOVA,P <0.01)。这些发现证实了先前的研究,表明铅和其他金属是从活跃的铅锌矿中释放出来的,可被水生生物吸收。

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