Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan.
Environ Int. 2010 Jan;36(1):27-35. doi: 10.1016/j.envint.2009.09.003. Epub 2009 Oct 25.
Concentrations of persistent organic pollutants (POPs) such as polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs) and organochlorine pesticides were measured in human breast milk collected from mothers residing near an open dumping site and a reference site in Kolkata, India during 2004-2005. POPs were detected in all the human milk samples analyzed, suggesting that residents of Kolkata are widely exposed to these contaminants. Concentrations of dioxin-like PCBs in the samples from the dumping site were significantly higher than in the reference site samples, whereas no such difference was found for PCDDs and PCDFs. In addition, significantly higher concentrations of total PCBs were also observed in the samples from the dumping site than the reference site. Interestingly, concentrations of total and dioxin-like PCBs in the breast milk of mothers from the dumping site significantly increased with the number of years of residence near the dumping site. These results indicate that significant pollution sources of PCBs are present in the dumping site of Kolkata and the residents living around are exposed to relatively higher levels of PCBs. When the residue levels of dioxins and related compounds in fish collected from ponds near the Kolkata dumping site and the reference site were measured, it was found that dioxin-like PCB and TEQ levels in fish from the dumping site were notably higher than those from the reference site. This result indicates that fish is a potential source of PCBs for residents living near the Kolkata dumping site.
2004-2005 年，在印度加尔各答的一个开放垃圾场附近和一个参照点采集了母亲的母乳样本，测量了其中持久性有机污染物（POPs）如多氯二苯并对二恶英（PCDDs）、多氯二苯并呋喃（PCDFs）、多氯联苯（PCBs）和有机氯农药的浓度。所有分析的母乳样本中均检测到了 POPs，这表明加尔各答的居民广泛接触到了这些污染物。垃圾场样本中类似二恶英的 PCB 浓度明显高于参照点样本，而 PCDDs 和 PCDFs 则没有这种差异。此外，垃圾场样本中的总 PCBs 浓度也明显高于参照点。有趣的是，垃圾场母亲的母乳中总 PCBs 和类似二恶英的 PCBs 浓度与居住在垃圾场附近的年限呈显著正相关。这些结果表明，加尔各答垃圾场存在着显著的 PCB 污染源，周围的居民接触到的 PCBs 水平相对较高。当测量取自加尔各答垃圾场附近和参照点池塘的鱼类中的二恶英和相关化合物残留水平时，发现垃圾场鱼类中的类似二恶英的 PCB 和 TEQ 水平明显高于参照点鱼类。这一结果表明，鱼类是居住在加尔各答垃圾场附近的居民的 PCB 潜在来源。
