Effects of algal bloom formation, outbreak, and extinction on heavy metal fractionation in the surficial sediments of Chaohu Lake
Effects of algal bloom formation, outbreak, and extinction on heavy metal fractionation in the surficial sediments of Chaohu Lake
复制标题
藻华形成、爆发和灭绝对巢湖表层沉积物重金属分馏的影响
DOI：
10.1007/s11356-015-4652-y
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发表时间：
2015-05
影响因子：
5.8
通讯作者：
LS He
中科院分区：
文献类型：
--
作者：
SG Wang;XJ Diao;LS He
水华对湖泊水体和沉积物理化和生物化学性质的影响已被广泛研究。然而，有限的注意力一直针对AB的形成，爆发和灭绝的过程中对沉积物中重金属分馏的影响。于2012年5 - 9月对巢湖AB区和FAB区的水体和沉积物进行了采样分析。采用改进的三步法测定了沉积物中Cd、Cr、Cu、Mn、Ni、Fe和Pb 7种重金属的化学形态。在AB区观察到明显的AB形成、爆发和灭绝过程，而在FAB区没有观察到。AB区水体和沉积物中TN和TP浓度显著高于FAB区。水体溶解氧浓度在爆发前AB区高于FAB区，但在爆发后的不同阶段呈现相反的趋势。沉积物中的金属分馏表明，除了锰和铜，大多数金属的残留馏分，无论AB过程。AB过程稍微改变的金属馏分的浓度，除了可还原的铁和可氧化的铜。结果表明，虽然沉积物中重金属的形态特征在AB形成、爆发和消亡过程中存在显著差异，但AB形成、爆发和消亡过程对沉积物中重金属形态的影响较小。
The effects of algal bloom (AB) on the physicochemical and biochemical properties of water and sediment in lakes have been widely studied. However, limited attention has been directed toward the effects of the processes of AB formation, outbreak, and extinction on heavy metal fractionation in sediment. In this study, water and sediment samples were collected from the AB and free algal bloom (FAB) regions of Chaohu Lake from May to September in 2012. The chemical fractionation of seven heavy metals (Cd, Cr, Cu, Mn, Ni, Fe, and Pb) in sediment was determined by using a modified three-step sequential procedure. Evident processes of AB formation, outbreak, and extinction were observed in the AB region, but not in the FAB region. The TN and TP concentrations in water and sediment in the AB region were significantly higher than those in the FAB region. The water DO concentration was higher in the AB region than that in the FAB region before the early stage of the AB outbreak, but an opposite trend was observed in the stages that followed. Metal fractionation in sediment showed that except for Mn and Cu, the majority of metals were in the residual fraction regardless of the AB process. The AB process slightly altered the concentrations of metal fractions, except for reducible Fe and oxidizable Cu. The result showed that AB formation, outbreak, and extinction slightly affected heavy metal fractionation in sediment though water properties were significantly different among AB processes.
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影响因子：
--
作者：
Paerl HW;Fulton RS 3rd;Moisander PH;Dyble J
通讯作者：
Dyble J
影响因子：
3.4
作者：
J. Stecko;L. Bendell-Young
通讯作者：
J. Stecko;L. Bendell-Young
影响因子：
6.1
作者：
R. Martín;D. M. Sánchez;A. Gutiérrez
通讯作者：
R. Martín;D. M. Sánchez;A. Gutiérrez
影响因子：
6.9
作者：
Chun Ye;Zhemin Shen;Tao Zhang;M. Fan;Yangming Lei;Jianda Zhang
通讯作者：
Chun Ye;Zhemin Shen;Tao Zhang;M. Fan;Yangming Lei;Jianda Zhang
影响因子：
1.6
作者：
Jin Xiangcan
通讯作者：
Jin Xiangcan