原文服务方: 地球化学学报(英文)       
摘要:
Concentrations of metals along with pH, potential redox(Eh), total dissolved solid(TDS), electrical conductivity(EC) and salinity were measured for sediments of different layers, pore and surface water in the Anzali wetland. Also, the diffusive flux of metals was calculated ad compared with the values in other aquatic bodies. The abundance of metals in sediments was Al >Fe > Ca > Ti > Mn > Zn > V > Cr > Ni > Cu > Pb >Co > As > Mo > Ag > Cd, while the pore-water results indicated a different concentration profile: Ca > Mn >Fe > Al > V > Mo > As > Ni > Cu > Co. Anzali wetland is classified within a high ecological risk. Pore-water toxicity test showed it is in non-polluted condition. Eh–pH diagrams showed that all species of elements are in a stable state in surface and pore-waters. However, Mn and Co(in some layers) are in soluble form and free ions and thus are bioavailable to the organisms. V and As are also present in the form of hydrogen compounds and Ni in the form of hydroxides, therefore, they are toxic to aquatic animals due to their solubility and ionic forms. Diffusive fluxes for As, Al, Fe, Ca, Cu, Mn, Mo, Ni and V are 0.43,1.80, 48.52, 43,147.50, 0.12, 1.47, 0.15, 1.28, 0.21 μg/m2/day, respectively. Cluster analysis showed that in a solid phase of sediments, elements such as Cr, As and Ti are of petroleum and terrestrial origin. In pore-waters, Cu is of petroleum and biological origin, and Mo, As, Cu and Co are controlled by p H.
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篇名 Behavior, toxicity and diffusive flux of metals in a sediment core and pore-water from Anzali wetland
来源期刊 地球化学学报(英文) 学科 地球科学
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年,卷(期) 2025,(2) 所属期刊栏目
研究方向 页码范围 127-149
页数 23页 分类号
字数 语种 中文
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地球化学学报(英文)
双月刊
2096-0956
52-1161/P
大16开
贵州省贵阳市观水路46号地球化学研究所
1982-01-03
英文
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