Identification of a Potential Toxic Hot Spot Associated with AVS Spatial and Seasonal Variation
Identification of a Potential Toxic Hot Spot Associated with AVS Spatial and Seasonal Variation
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DOI：
10.1007/s00244-008-9206-6
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发表时间：
2009-04
影响因子：
4
通讯作者：
O. Campana;Antonio Rodríguez;Julián Blasco
中科院分区：
文献类型：
--
作者：
O. Campana;Antonio Rodríguez;Julián Blasco
在水生沉积物的风险评估中，酸挥发性硫化物（AVS）和同时提取的金属（SEMs）作为金属有效性指标的差异受到了广泛关注。沿着瓜达莱特河河口选择了10个有代表性的采样点。在冬季和夏季对表层沉积物进行采样，以更好地了解SEM和AVS的空间和季节分布，并建立优先风险区。总SEM浓度（SEM）范围为0.3至4.7 μmol g−1。季节间差异不显著，但不同采样点间差异显著。AVS浓度变化更大，表现出显着的空间和时间变化。该值范围为0.8至22.4 μmol g−1。除河口附近的一个测站外，其余测站的SEM/AVS比值均小于1。结果提供了一个潜在的污染源附近的河口，可能与船舶相关的活动在当地的港口地区位于附近的车站进行的信息。
In risk assessment of aquatic sediments, much attention is paid to the difference between acid-volatile sulfide (AVS) and simultaneously extracted metals (SEMs) as indicators of metal availability. Ten representative sampling sites were selected along the estuary of the Guadalete River. Surficial sediments were sampled in winter and summer to better understand SEM and AVS spatial and seasonal distributions and to establish priority risk areas. Total SEM concentration (ΣSEM) ranged from 0.3 to 4.7 μmol g−1. It was not significantly different between seasons, however, it showed a significant difference between sampling stations. AVS concentrations were much more variable, showing significant spatial and temporal variations. The values ranged from 0.8 to 22.4 μmol g−1. The SEM/AVS ratio was found to be <1 at all except one station located near the mouth of the estuary. The results provided information on a potential pollution source near the mouth of the estuary, probably associated with vessel-related activities carried out in a local harbor area located near the station.