The behavior and environmental impact of mercury released through the human activity

人类活动释放的汞的行为和环境影响

基本信息

批准号：
15404003
负责人：
TOMIYASU Takashi
金额：
$ 8.45万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The chemical forms of mercury in water and sediment in Idrijca river were investigated. Fresh river water and sediment samples were collected from 4 locations in 2003, and 5 locations in 2004.T-Hg, RHg and Hg^0 concentrations in water were 4.8 - 312 ng/l, 0.77 - 164 ng/l and 0.13 - 66.5 ng/l, respectively. The highest concentrations of the individual species were recorded in the sample taken from the nearest point of the mine and their concentrations decreased with distance from the mine. MeHg concentration in river water was 0.058 - 0.588 ng/l and the highest MeHg concentration was observed at a point about 1 km lower leaches of the mine. In order to estimate the release of mercury from sediment into water, sediment was taken from 5 locations with river water in plastic bottles. The bottles were filled with the sample at the sites, brought back to laboratory and stored at room temperature. After 5days, the water overlying sediment in the bottle was separated into three parts, that is, supernatant layer, suspended layer and pore water. Water in suspended layer was used for mercury determination after centrifugation. The supernatant layer and pore water were filtered (0.45 μm Millipore filters) to determine dissolved T-Hg and MeHg. T-Hg and MeHg concentrations in the waters were 2 - 119 times and 19 - 1357 times higher than that in fresh river water, respectively. The observation suggested that the river sediment could become significant source of mercury in river water. To understand the different behavior between MeHg and other mercury species in the river, kinetic investigations will be required.

研究了Idrijca河水和沉积物中的汞化学形式。从2003年的4个位置收集新鲜的河水和沉积物样品，在2004.T -HG，RHG和HG^0水中的5个位置分别为4.8-312 ng/L，0.77-164 ng/l和0.13-66.5 ng/l。在从矿山的最近点采集的样品中记录了最高的单个物种浓度，其浓度随着距离矿山的距离而降低。河水中的MEHG浓度为0.058-0.588 ng/l，在矿山下方约1公里处观察到最高的MEHG浓度。为了估算从沉积物中释放到水中的汞，从5个位置带有塑料瓶中的河水。瓶子在地点装满了样品，带回实验室并在室温下储存。 5天后，将瓶子上覆盖的沉积物分成三个部分，即上清液，悬浮层和孔隙水。离心后悬浮层中的水用于汞测定。过滤上清液层和孔隙水（0.45μm毫米过滤器），以确定溶解的T-HG和MEHG。水域中的T -HG和MEHG浓度分别比新鲜河水高2-119次和19-1357倍。该观察结果表明，河流沉积物可能成为河水中汞的重要来源。要了解MEHG与河中其他汞物种之间的不同行为，需要进行动力学研究。

项目成果

期刊论文数量（28）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Adsorption of mercury on used tea leaves and coffee beans

用过的茶叶和咖啡豆上汞的吸附

DOI：
发表时间：
2003
期刊：
BUNSEKI KAGAKU 52
影响因子：
0
作者：
T.Tomiyasu;T.Tomiyasu;T.Tomiyasu;T.Tomiyasu;Takashi Tomiyasu;K.Anazawa;T.Tomiyasu;R.Rajar;H.Sakamoto;K.Anazawa;T.Tomiyasu;H.Sakamoto;Rudi Rajar;Milena Horvat;Takashi Tomiyasu;Shinichiro Yano;Akihide Tada;清原拓二;矢野真一郎;T.Kiyohara
通讯作者：
T.Kiyohara

Spatial variation of mercury in sediments of Minamata Bay, ten years later from Minamata Bay pollution prevention project

水俣湾污染防治项目十年后水俣湾沉积物中汞的空间变化

DOI：
发表时间：
2004
期刊：
Proceedings of the 7^<th> International Conference on Mercury as a Global Pollutant
影响因子：
0
作者：
T.Tomiyasu;T.Tomiyasu;T.Tomiyasu;T.Tomiyasu;Takashi Tomiyasu;K.Anazawa;T.Tomiyasu;R.Rajar;H.Sakamoto;K.Anazawa;T.Tomiyasu;H.Sakamoto;Rudi Rajar;Milena Horvat;Takashi Tomiyasu
通讯作者：
Takashi Tomiyasu

Low Level Mercury Uptake by Plants from Natural Environments-Mercury Distribution in Solidago altissima L.

植物从自然环境中吸收的低水平汞——一枝黄花中的汞分布。