Environmental Chemistry and Toxicology Research Unit, Pure and Industrial Chemistry Department, Nnamdi Azikiwe University, Awka Anambra State, Nigeria.
Int J Environ Res Public Health. 2010 Jun;7(6):2501-13. doi: 10.3390/ijerph7062501. Epub 2010 Jun 10.
Lead (Pb) levels were measured in roadside surface soils, dust particles and rain water samples from the urban cities of Enugu, Awka, Onitsha, Nnewi, Aba, Port Harcourt and Warri in Southern Nigeria in 2007 and 2008. Samples were collected during the dry season, while rain water samples were collected during the early rain (April-June), mid rain (July-August) and late rain seasons (September-October) for the two years. Soil samples were collected from traffic congested roads, dust was collected by tying a plastic basin on a pole 1.5 m above ground level and leaving it for 45 days. Rain samples were collected from three equidistant points. Samples were analyzed by AAS. The highest soil Pb of 120.00 +/- 0.00 and 80.36 +/- 0.00 mg/kg were reported in Onitsha for 2007 and 2008, respectively. Nnewi showed 33.40 +/- 0.01 and 4,238.29 +/- 0.00 mg/kg for 2007 and 2008. Aba had 22.56 +/- 0.01 and 21.28 +/- 0.00 mg/kg for 2007 and 2008. Higher concentrations were recorded for Nnewi and Port Harcourt in 2008 than in 2007. Enugu had more in 2007 while Awka had more in 2008. Dust Pb ranged from 0.13-0.49 mg/kg and 0.15-0.47 mg/kg for 2007 and 2008, respectively. Rain samples had the least Pb concentration, ranging from 0.103 +/- 0.000 to 0.163 +/- 0.046 mg/L. We may conclude that Nigerians are exposed to environmental Pb.
2007 年和 2008 年，在尼日利亚南部城市埃努古、阿瓦卡、奥尼查、新韦、阿坝、哈科特港和瓦里采集了路边表层土壤、灰尘颗粒和雨水样本，并测量了其中的铅（Pb）含量。样本是在旱季采集的，而雨水样本则是在两年的早雨（4 月至 6 月）、中雨（7 月至 8 月）和晚雨（9 月至 10 月）季采集的。土壤样本取自交通拥堵的道路，灰尘则是通过将一个塑料盆绑在离地面 1.5 米高的杆子上，放置 45 天收集的。雨水样本是从三个等距点采集的。样本通过原子吸收光谱法进行分析。报告显示，2007 年和 2008 年，奥尼查的土壤 Pb 含量最高，分别为 120.00 +/- 0.00 和 80.36 +/- 0.00 mg/kg。新韦的含量分别为 2007 年 33.40 +/- 0.01 和 4,238.29 +/- 0.00 mg/kg，2008 年 4238.29 +/- 0.00 mg/kg。2008 年，新韦和哈科特港的浓度高于 2007 年。2007 年，埃努古的浓度更高，而 2008 年，阿瓦卡的浓度更高。灰尘中的 Pb 含量分别为 2007 年 0.13-0.49 mg/kg 和 2008 年 0.15-0.47 mg/kg。雨水样本中的 Pb 浓度最低，范围为 0.103 +/- 0.000 至 0.163 +/- 0.046 mg/L。我们可以得出结论，尼日利亚人暴露在环境 Pb 中。
