Plant Protection Department, Benha University, Benha, Egypt,
Environ Monit Assess. 2013 Dec;185(12):10257-68. doi: 10.1007/s10661-013-3330-0. Epub 2013 Jul 25.
To evaluate the organochlorine pesticide (OCP) contamination of Manzala Lake, its ecosystem was investigated during the winter season (December to March). The studied ecosystem components were water, sediment, aquatic weeds, and fishes in four locations. The samples were analyzed by gas chromatography with electron capture detector. Pollutant levels of total OCPs showed significantly high levels in the water areas of Round road (46.253 ng/ml), Port-Said Damietta road (19.301 ng/ml), followed by Bughas El-Rasoah (5.539 ng/ml), then Ashtoum El Gamel (natural reserve area now) (0.289 ng/ml). Organochlorines were detected in sediment only in Round road (3.359 μg/kg) and Port-Said Damietta road (0.171 μg/kg) by significant order while they were undetectable in Ashtoum El Gamel and Bughas El-Rasoah. Total OCPs in aquatic weeds ranged between 0.194 μg/kg in Port-Said Damietta and 0.026 μg/kg in Ashtoum El Gamel. While OCPs were 0.160 and 0.153 μg/kg in Round road and Bughas El-Rasoah, respectively. Concerning fish muscles OCPs were significantly higher in the Round road area (0.397 μg/kg) followed by the Port-Said Damietta road (0.258 μg/kg), and finally, Ashtoum El Gamel samples (0.126 μg/kg). The results revealed the direct relation for the accumulation of OCPs between studied ecosystem parameters at the Manzala Lake during the winter season. Results also demonstrated that fish samples collected from the Manzala Lake in the studied areas were contaminated with levels of organochlorines, not higher than the maximum permissible level recorded by FAO/WHO, and that the public is not at risk with fish consumption.
为了评估曼扎拉湖的有机氯农药 (OCP) 污染情况，在冬季（12 月至 3 月）对其生态系统进行了调查。研究的生态系统组成部分包括四个地点的水、沉积物、水生杂草和鱼类。样品通过带电子捕获检测器的气相色谱法进行分析。总 OCP 的污染物水平在 Round 路（46.253ng/ml）、Port-Said Damietta 路（19.301ng/ml）的水域显著较高，其次是 Bughas El-Rasoah（5.539ng/ml），然后是 Ashtoum El Gamel（现为自然保护区）（0.289ng/ml）。只有在 Round 路（3.359μg/kg）和 Port-Said Damietta 路（0.171μg/kg）中检测到沉积物中的有机氯，而在 Ashtoum El Gamel 和 Bughas El-Rasoah 中则无法检测到。水生杂草中的总 OCP 范围在 Port-Said Damietta 的 0.194μg/kg 至 Ashtoum El Gamel 的 0.026μg/kg 之间。而在 Round 路和 Bughas El-Rasoah 中，OCP 分别为 0.160μg/kg 和 0.153μg/kg。至于鱼类肌肉中的 OCP，Round 路地区的含量明显较高（0.397μg/kg），其次是 Port-Said Damietta 路（0.258μg/kg），最后是 Ashtoum El Gamel 样品（0.126μg/kg）。结果表明，在冬季曼扎拉湖的研究生态系统参数之间存在 OCP 积累的直接关系。结果还表明，从研究区域的曼扎拉湖采集的鱼类样本受到有机氯污染，但污染水平未超过粮农组织/世卫组织记录的最大允许水平，公众食用鱼类不存在风险。
