Department of Chemistry, Faculty of Science, University of Mauritius, Reduit, Mauritius.
Environ Monit Assess. 2010 Sep;168(1-4):345-51. doi: 10.1007/s10661-009-1118-z. Epub 2009 Aug 13.
Zn and Pb were quantified using atomic absorption spectrometry from urban and rural estuarine sediments collected along the western coast of Mauritius over three consecutive dry winter and wet summer periods from August 2004 to February 2009. The mean concentrations of Zn (204.0 +/- 92.3 mg kg(-1)) and Pb (44.5 +/- 16.4 mg kg(-1)) in sediments at Sable Noir, an urban estuary, can be considered below those from contaminated estuarine sediments in industrialised countries. Pb significantly decreased from two consecutive winters 2004/2005 to summer 2005/2006 at Sable Noir at 5% significance level due to flash floods in summer and dilution with cleaner background sediments. Pb was however significantly higher at Sable Noir in winter 2004 compared to winter 2005 and significantly increased from summer 2005 to summer 2006 due to a minor diesel spill in the estuary. Both Pb and Zn were significantly higher at Sable Noir in winter 2004 compared to Flic en Flac in winter 2008. Pb and Zn were also significantly higher at Sable Noir in summer 2005 compared to Flic en Flac in summer 2009. The concentrations of Zn and Pb were also significantly positively correlated in the estuarine sediments. The potential common sources of Pb and Zn in the urban estuarine sediments at Sable Noir were considered to arise from road runoff and zinc galvanised road furniture causing significant quantities to be trapped. There is at present a need for long-term studies in the cycling of Pb and Zn in estuarine sediments to integrate coastal zone management strategies.
使用原子吸收光谱法，从毛里求斯西部沿海的城乡河口沉积物中定量分析了锌和铅。这些样本是在 2004 年 8 月至 2009 年 2 月的三个连续旱冬和湿夏期间采集的。在萨布莱诺（Sable Noir）这个城市河口，沉积物中锌（204.0 +/- 92.3 mg kg(-1)) 和铅（44.5 +/- 16.4 mg kg(-1)) 的平均浓度可以认为低于工业化国家受污染河口沉积物中的浓度。由于夏季的洪水和更清洁的背景沉积物的稀释作用，2004/2005 年冬季到 2005/2006 年夏季，萨布莱诺的铅含量显著下降，在 5%的显著水平上。然而，2004 年冬季萨布莱诺的铅含量明显高于 2005 年冬季，并且由于河口发生了轻微的柴油泄漏，2005 年夏季到 2006 年夏季，铅含量显著增加。与 2008 年冬季的弗利康弗拉克（Flic en Flac）相比，2004 年冬季萨布莱诺的铅和锌含量都显著升高。与 2009 年夏季的弗利康弗拉克相比，2005 年夏季萨布莱诺的铅和锌含量也显著升高。河口沉积物中的锌和铅浓度也呈显著正相关。在萨布莱诺的城市河口沉积物中，铅和锌的潜在共同来源被认为是来自道路径流和镀锌的道路家具，导致大量的铅和锌被捕获。目前需要对河口沉积物中铅和锌的循环进行长期研究，以整合沿海地区的管理策略。
