Heavy metals, polycyclic aromatic hydrocarbons and polychlorinated biphenyls in surface sediments of the Naples harbour (southern Italy)
Heavy metals, polycyclic aromatic hydrocarbons and polychlorinated biphenyls in surface sediments of the Naples harbour (southern Italy)
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DOI：
10.1016/j.chemosphere.2006.10.055
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发表时间：
2007-03-01
期刊：
影响因子：
8.8
通讯作者：
Marsella, Ennio
中科院分区：
文献类型：
--
作者：
Sprovieri, Mario;Feo, Maria Luisa;Marsella, Ennio
那不勒斯港是地中海盆地最大和最重要的商业和旅游港口之一。它位于意大利东南海岸，接收那不勒斯市的工业和市政废水。由于其社会和经济影响，对地中海盆地这一地区的底层沉积物污染水平和来源进行全面评估，对于确定由于管理同一沉积物而产生的污染物移动所造成的潜在危险至关重要。（Cr、Cu、Ni、Pb、V、Zn、Co、Sn、Cd、Hg、As、Al和Fe）、16种多环芳烃（PAHs）和二萘嵌苯（苝）以及38种多氯联苯（PCB）同系物。Sri和Hg显示富集系数> 3，只有Hg的中值高于NOAA（效应范围-中值）准则。通过主成分分析，我们可以清楚地区分出两个主要受重金属污染影响的区域和两个受工业、商业和/或城市活动影响的区域，优先选择的多环芳烃主要是三五环化合物，其浓度范围在9 ~ 31774 ng g（-1）之间，经常高于NOAA ER-M指数。一个普遍的热解来源的多环芳烃进行了评估的基础上的相对丰度的不同的同源物和选定的异构体ratio.The浓度的多氯联苯，作为38个同源物的总和，范围从1到899纳克g-1，与高度氯化（四氯联苯和五氯联苯）同源物占主导地位。多环芳烃和多氯联苯的毒性当量值在工业、航运和/或商业活动密集的区域较高，表明这些污染源对污染物的分布模式有直接影响。(c)2006爱思唯尔有限公司保留所有权利。
The Naples's harbour is one of the largest and most important commercial and tourist port of the Mediterranean basin. It is located on the southeast coast of Italy and receives industrial and municipal wastewaters from the city of Naples. Due to its social and economic impact, a comprehensive assessment of levels and sources of contamination of bottom sediments in this area of the Mediterranean basin is essential to identify potential danger due to mobilization of contaminants produced by managing of the same sediments.In this study, superficial sediments collected from 189 sampling sites were analyzed for grain size, heavy metals (Cr, Cu, Ni, Pb, V, Zn, Co, Sn, Cd, Hg, As, Al and Fe), 16 priority polycyclic aromatic hydrocarbons (PAHs) and perylene and 38 individual polychlorinated biphenyl (PCB) congeners.Compared to the estimated local background, Cu, Zn, Pb, Cd, Sri and Hg show enrichment factors > 3 and only Hg evidences a median value higher than the NOAA (effects range - median) guidelines. Principal component analysis allowed us to clearly discriminate two areas mainly affected by heavy metals contamination and influenced by different sources related to industrial, commercial and/or urban activities.Priority PAHs are predominantly represented by three-five-ring compounds with concentrations ranging between 9 and 31774 ng g(-1) and frequently higher than the NOAA ER-M index. A prevalent pyrolitic origin of PAH was assessed on the basis of the relative abundance of the different congeners and selected isomer ratios.The concentrations of PCBs, as sum of the 38 congeners, ranged from I to 899 ng g-1, with a predominance of highly chlorinated (tetra- and penta-chlorobiphenyls) congeners. WHO-TEQ values, calculated for the PCDD-like PCB congeners, suggest a relatively high level of toxicity.Generally, the concentration of PAHs and PCBs were higher near the sites of intense industrial, shipping and/or commercial activities suggesting a direct influence of these sources on the pollutant distribution patterns. (c) 2006 Elsevier Ltd. All rights reserved.