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dc.contributor.authorLiu, Jingchun
dc.contributor.author刘景春
dc.contributor.authorYan, Chongling
dc.contributor.author严重玲
dc.contributor.authorMacnair, Mark R.
dc.contributor.authorHu, Jun
dc.contributor.authorLi, Yuhong
dc.date.accessioned2011-08-22T11:39:42Z
dc.date.available2011-08-22T11:39:42Z
dc.date.issued2007
dc.identifier.citationEnvironmental Science and Pollution Research ,Volume 14, Number 5, 345-349zh_CN
dc.identifier.issn0944-1344
dc.identifier.urihttp://dx.doi.org/doi:10.1065/espr2006.05.306
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/10535
dc.description.abstractBackground. Acid-volatile sulfide (AVS) is operationally defined as sulfides in sediment, which are soluble in cold acid, and is reported as the most active part of the total sulfur in aquatic sediments. It is a key partitioning phase controlling the activities of divalent cationic heavy metals in sediment. Methods. In order to examine this in mangrove environments, six sites were selected along the Jiulong River Estuary in Fujian, China, which had previously been reported to be polluted by heavy metals. Sediments were sampled from 0-60 cm depth at each site, and the spatial distribution of AVS and SEM (simultaneously extracted metals: copper, cadmium, zinc, and lead) were determined. Results and Discussion. The results indicate that the AVS concentrations had a spatial variation, ranging from 0.24 to 16.10 mu mol g(-1) sediment dry weight. The AVS concentration in the surface layer is lower than that of the deeper sediment, with peak values in the 15-30 cm horizon. There was no correlation between the AVS value and organic matter content or total dissolved salts, but a significant positive correlation of AVS with surface sediment (0-5 cm) moisture content was found. This indicates that water logged sediments tend to have a high AVS value. The amount of SEM was within the range of 0.33-2.80 mu mol g(-1) sediment dry weight and decreased with sediment depth. Conclusions. There was a marked variation in AVS and SEM among different sites studied. AVS concentrations were generally lower in the surface sediments, while SEM concentrations slightly decreased with the depth. Higher concentrations of SEM found in the upper layers of the sediments confirm the earlier suggestions that this study area may suffer from increasing heavy metal pollution. Recommendations and Perspectives. When monitoring environmental impacts by using AVS, the micro and large-scale spatial variation as well as vertical distribution need to be estimated to avoid misleading results. Both AVS and SEM concentrations in different sediment layers should be taken into account in assessing the potential impact of heavy metals on the biotic environment.zh_CN
dc.language.isoenzh_CN
dc.publisherECOMED PUBLISHERSzh_CN
dc.subjectacid-volatile sulfide (AVS)zh_CN
dc.subjectChinazh_CN
dc.subjectheavy metalszh_CN
dc.subjectJiulong River Estuaryzh_CN
dc.subjectmangroveszh_CN
dc.subjectsedimentzh_CN
dc.subjectsimultaneously extracted metals (SEM)zh_CN
dc.titleVertical distribution of acid-volatile sulfide and simultaneously extracted metals in mangrove sediments from the Jiulong River Estuary, Fujian, Chinazh_CN
dc.typeArticlezh_CN


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