PCBs and DDTs in light-vented bulbuls from Guangdong Province, South China: Levels, geographical pattern and risk assessment
PCBs and DDTs in light-vented bulbuls from Guangdong Province, South China: Levels, geographical pattern and risk assessment
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华南广东省白头鹎中的多氯联苯和滴滴涕：含量、地理格局和风险评估
DOI：
10.1016/j.scitotenv.2014.05.066
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发表时间：
2014-08-15
影响因子：
9.8
通讯作者：
Mai, Bi-Xian
中科院分区：
文献类型：
--
作者：
Sun, Yu-Xin;Hao, Qing;Mai, Bi-Xian
从广东省6个采样点采集32只白头叶蜂（Pycnonotus sinensis），研究白头叶蜂体内多氯联苯（PCBs）、二氯二苯三氯乙烷（DDTs）及其代谢产物（DDTs）的分布特征。多氯联苯和滴滴涕的浓度在胸肌的轻排气白头翁从140至73，000纳克/克脂重（lw）和12至4600纳克/克脂重，分别。与其他采样点相比，电子垃圾场鸟类中的多氯联苯浓度显著较高（平均值为18，000 vs 290 ng/g lw，p < 0.0001），这意味着多氯联苯主要来自电子垃圾回收活动。各采样点的滴滴涕水平没有显著差异（p = 0.092）。不同采样点的多氯联苯同系物分布存在差异，这可能归因于不同的当地污染源。p，p '-DDE（>80%）是鸟类体内DDTs含量最高的组分。DDT的组成模式表明历史残留是DDT的主要来源。毒性当量（TEQ）浓度与PCB浓度呈显著正相关，表明PCB水平升高可能对透光灯泡产生不利影响。(C)2014爱思唯尔有限公司版权所有。
Thirty-two light-vented bulbuls (Pycnonotus sinensis) were collected from six sampling sites in Guangdong Province, South China to investigate the geographical variation on the occurrence of polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs). Concentrations of PCBs and DDTs in the pectoral muscle of light-vented bulbul ranged from 140 to 73,000 ng/g lipid weight (lw) and 12 to 4600 ng/g lw, respectively. PCB concentrations were significantly higher in birds from e-waste site compared to other sampling sites (mean, 18,000 vs 290 ng/g lw, p < 0.0001), implying that PCBs mainly came from e-waste recycling activities. No significant differences for DDT levels were observed among the sampling sites (p = 0.092). Differences in PCB homologue profiles among the sampling sites were found and can be probably ascribed to different local contamination sources. p,p'-DDE (>80%) was the most abundant component of DDTs in birds. Compositional pattern of DDTs suggested that historical residue was the main source of DDT. The toxic equivalent (TEQ) concentrations had significant positive correlations with PCB concentrations, indicating that elevated PCB levels may have adverse effects on light-vented bulbuls. (C) 2014 Elsevier B.V. All rights reserved.