Vertical Distribution of Lead and Mercury in the Wetland Argialbolls of the Sanjiang Plain in Northeastern China.
Vertical Distribution of Lead and Mercury in the Wetland Argialbolls of the Sanjiang Plain in Northeastern China.
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东北三江平原泥铃湿地铅汞垂直分布
DOI：
10.1371/journal.pone.0124294
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Ouyang W
中科院分区：
文献类型：
--
作者：
Lin C;Li P;Cheng H;Ouyang W
湿地Argialbolls土壤被选中调查成壤过程和人类活动的铅和汞浓度的垂直分布的影响，并评估潜在的使用土壤作为大气铅和汞污染的档案。在中国东北三江平原的两个地点，从地表5 cm到90 cm深的土壤取样。土壤pH值，土壤有机质（SOM），铁，锰，和铝进行了分析。结果表明，有机质浓度随深度逐渐降低，而铁和锰从上层的还原性淋溶和积累在较低的粘层显着。在成土过程中大气铅和汞的沉积和再分配导致了一个独特的垂直分布在湿地金棉铃。总体而言，铅从上层淋溶，然后在下层粘化层积累。然而，汞浓度随深度下降，以下SOM分布。铅含量与铁、锰含量呈显著正相关，汞含量与有机质呈显著正相关。沉积后的流动性沿着的湿地Argialballs配置文件是较高的铅和低的汞。因此，Argialballs的配置文件并不能提供一个准确的重建大气铅沉积，但可能会提供一个准确的重建净大气汞沉积。
The wetland Argialbolls pedon was chosen to investigate the effects of pedogenic processes and anthropogenic activities on the vertical distribution of lead and mercury concentration and to assess the potential use of soil as an archive of atmospheric Pb and Hg pollution. The soil was sampled from 5 cm from the surface to a depth of 90 cm at two locations in the Sanjiang Plain in northeastern China. The soil was analyzed for pH, soil organic matter (SOM), Fe, Mn, and Al. The results indicate that the SOM concentration gradually decreased with depth, while Fe and Mn were reductively leached from the upper horizons and accumulated significantly in the lower argillic horizons. Atmospheric Pb and Hg deposition and their redistribution during the pedogenic process led to a unique vertical distribution in the wetland Argialbolls. Overall, Pb was leached from the upper horizons and then accumulated in the lower argillic horizons. However, the Hg concentration decreased with depth, following the SOM distribution. The Pb concentration was significantly correlated to the Fe and Mn concentrations in the Argialbolls profiles, while the Hg concentration was significantly correlated with SOM. Post-depositional mobility along the wetland Argialbolls profile is higher for Pb and low for Hg. Therefore, the Argialbolls profile does not provide an accurate reconstruction of atmospheric Pb deposition, but might provide an accurate reconstruction of net atmospheric Hg deposition.
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