Bancon-Montigny Ch, Lespes G, Potin-Gautier M
Laboratoire de Chimie Analytique, Bio-Inorganique et Environnment, Université de Pau et des Pays de l'Adour, UMR CNRS 5034, Av de l'Université, 64000 PAU, France.
Water Res. 2004 Feb;38(4):933-46. doi: 10.1016/j.watres.2003.10.038.
Organotin monitoring was performed in waters of 11 rivers of the southwest of France during a 9 months period, between February and October 2001. Surface sediments were studied during the summer. Eighteen sampling points were chosen as representative of specific industrial or agricultural activities. In most samples, organotins were detected and butyltins are the most frequently present, with concentrations ranging over 0.2-30 ng(Sn)/L. Phenyltins were detected especially in spring and at the end of summer, which corresponds to likely diffusion from agricultural sources. Some high butyl- and phenyltin concentrations up to 700 ng(Sn)/L occurred during the spring where pesticides for agricultural activities were largely used. Octyltins were present in water frequently as well, with lower concentrations, probably originating from continuous leaching of plastics. Sediments appeared contaminated by the same species, with higher monobutyltin concentrations of about 30-40 microg(Sn)/kg which shows the importance of biological degradations occurring in surface sediments. This non-pesticidal organotin compounds can also be introduced from leaching of organotin-stabilized PVC by water. Using the different organotin concentrations obtained and other physico-chemical parameters measured, such as temperature or water flow rate, a statistical study was performed by principal component analysis. The results obtained allow the main sources of organotin diffusion to be identified and the hydrological cycle of these compounds better understand.
2001年2月至10月的9个月期间，对法国西南部11条河流的水域进行了有机锡监测。夏季对表层沉积物进行了研究。选择了18个采样点作为特定工业或农业活动的代表。在大多数样本中都检测到了有机锡，其中丁基锡最为常见，浓度范围在0.2 - 30纳克（锡）/升之间。苯基锡尤其在春季和夏末被检测到，这可能对应于来自农业源的扩散。在大量使用农业活动农药的春季，出现了一些高达700纳克（锡）/升的高丁基锡和苯基锡浓度。辛基锡在水中也经常存在，浓度较低，可能源于塑料的持续浸出。沉积物似乎也受到了相同物种的污染，单丁基锡浓度较高，约为30 - 40微克（锡）/千克，这表明表层沉积物中发生生物降解的重要性。这种非农药有机锡化合物也可能通过水对有机锡稳定的聚氯乙烯的浸出而引入。利用获得的不同有机锡浓度和测量的其他物理化学参数，如温度或水流速，通过主成分分析进行了统计研究。所得结果有助于确定有机锡扩散的主要来源，并更好地了解这些化合物的水文循环。
