Spatial and seasonal variations in soil and river water mercury in a boreal forest, Changbai Mountain, Northeastern China
Spatial and seasonal variations in soil and river water mercury in a boreal forest, Changbai Mountain, Northeastern China
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长白山北方森林土壤和河水汞的时空变化
DOI：
10.1016/j.geoderma.2013.04.026
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发表时间：
2013-09
期刊：
影响因子：
6.1
通讯作者：
Jia, Yongfeng
中科院分区：
文献类型：
--
作者：
Wang, Shaofeng;Xing, Denghua;Wei, Zhongqing;Jia, Yongfeng
于2009年4月和9月对长白山北坡土壤和河水中总汞（THg）和甲基汞（MeHg）的分布特征进行了研究。土壤中的THg浓度范围为0.08至0.73mgkg−1（干重），平均值为0.24mgkg−1。这一平均值远高于长白山北坡的背景值（0.055mgkg-1）。土壤中的甲基汞含量范围为0.05 - 0.56μgkg−1，平均值为0.25μgkg− 1，占总汞的0.1%。在35厘米的土壤中，总汞和甲基汞的储存量分别为304- 946 gha − 1和419- 875 mgha −1。森林土壤和河水中的总汞和甲基汞的季节和海拔变化进行了观察。在低海拔地区的O层中，THg在寒冷季节有显著的积累。据预测，当地人类活动释放的汞将是北方森林中汞的重要来源。4月份河水中THg浓度（8.3±4.8ngL-1）比9月份（3.2±1.1ngL-1）高出近2倍。从这些值，并在河水中的颗粒汞和总汞之间的统计学显着的关系，我们推断，地表径流是主要形式的汞运输从高地森林地面到下游地区。土壤中甲基汞的浓度在9月高于4月。最高浓度在O层中观察到，这可能是由于温度和有机质对汞甲基化的影响。O层和河水中的THg和MeHg的动态可能代表了北方森林地表Hg的季节性积累和降解过程。长白山北部森林土壤是松花江中总汞和甲基汞的重要来源。
The distributions of total mercury (THg) and methyl mercury (MeHg) in soils and river water on the north slope of the Changbai Mountain were investigated in April and September, 2009. Concentrations of THg in soils ranged from 0.08 to 0.73mgkg−1(dry weight), with an average of 0.24mgkg−1. This average was much higher than the background value on the north slope of the Changbai Mountain (0.055mgkg−1). MeHg in soils ranged from 0.05 to 0.56μgkg−1, averaging 0.25μgkg−1and accounting for 0.1% of THg. The storage of THg and MeHg calculated for soils of 35cm was estimated at 304–946gha−1and 419–875mgha−1, respectively. Seasonal and altitudinal changes in THg and MeHg were observed in forest floor soils and river water. In the O horizon of low altitude sites, THg accumulated significantly during the cold season. It was expected that Hg releases from local anthropogenic activities would be an important Hg source in boreal forest. THg concentration in river water collected in April (8.3±4.8ngL−1) was almost 2 times higher than that collected in September (3.2±1.1ngL−1). From these values, and the statistically significant relationships found between particulate Hg and total Hg in river water, we deduce that surface runoff is the dominant form of Hg transportation from the upland forest floor to downstream regions. Concentrations of MeHg in soils were higher in September than in April. The highest concentration was observed in the O horizon; this may be due to the impacts of temperature and organic matter on Hg methylation. The dynamics of THg and MeHg in the O horizon and river water may represent a process of seasonal accumulation and degradation of Hg in the boreal forest floor. Soils in the boreal forest of Changbai Mountain were demonstrated to be an important source of THg and MeHg in the Songhuajiang River.
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DOI：
10.1023/a:1017574103867
发表时间：
2001-05
期刊：
Water, Air and Soil Pollution: Focus
影响因子：
--
作者：
J. Munthe;B. Lyvén;H. Parkman;Y. Lee;Å. Iverfeldt;C. Haraldsson;M. Verta;Petri Porvari
通讯作者：
J. Munthe;B. Lyvén;H. Parkman;Y. Lee;Å. Iverfeldt;C. Haraldsson;M. Verta;Petri Porvari
DOI：
10.1016/s0048-9697(00)00565-9
发表时间：
2000-10
期刊：
The Science of the total environment
影响因子：
--
作者：
D. Schwesig;E. Matzner
通讯作者：
D. Schwesig;E. Matzner
影响因子：
11.4
作者：
Ye Wu;Shuxiao Wang;D. Streets;J. Hao;M. Chan;Jingkun Jiang
通讯作者：
Ye Wu;Shuxiao Wang;D. Streets;J. Hao;M. Chan;Jingkun Jiang
影响因子：
4
作者：
U. Skyllberg;J. Qian;W. Frech;K. Xia;W. Bleam
通讯作者：
U. Skyllberg;J. Qian;W. Frech;K. Xia;W. Bleam
影响因子：
8.3
作者：
Shunlin Tang;Xinbin Feng;J. Qiu;G. Yin;Zaichan Yang
通讯作者：
Shunlin Tang;Xinbin Feng;J. Qiu;G. Yin;Zaichan Yang