Distribution characteristics of dissolved aluminum in the Changjiang Estuary and its adjacent marine area in March and July,2012

Guo Ying; Ren Jingling; Li Faming; Wang Zhaowei; Zhang Xuzhou; Zhang Ruifeng

doi:10.3969/j.issn.0253-4193.2016.02.003

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Guo Ying, Ren Jingling, Li Faming, Wang Zhaowei, Zhang Xuzhou, Zhang Ruifeng. Distribution characteristics of dissolved aluminum in the Changjiang Estuary and its adjacent marine area in March and July,2012[J]. Haiyang Xuebao, 2016, 38(2): 25-35. doi: 10.3969/j.issn.0253-4193.2016.02.003

Citation:

Guo Ying, Ren Jingling, Li Faming, Wang Zhaowei, Zhang Xuzhou, Zhang Ruifeng. Distribution characteristics of dissolved aluminum in the Changjiang Estuary and its adjacent marine area in March and July,2012[J]. Haiyang Xuebao, 2016, 38(2): 25-35. doi: 10.3969/j.issn.0253-4193.2016.02.003

Citation:

Guo Ying, Ren Jingling, Li Faming, Wang Zhaowei, Zhang Xuzhou, Zhang Ruifeng. Distribution characteristics of dissolved aluminum in the Changjiang Estuary and its adjacent marine area in March and July,2012[J]. Haiyang Xuebao, 2016, 38(2): 25-35. doi: 10.3969/j.issn.0253-4193.2016.02.003

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Distribution characteristics of dissolved aluminum in the Changjiang Estuary and its adjacent marine area in March and July,2012

doi: 10.3969/j.issn.0253-4193.2016.02.003

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China

Received Date: 2015-07-28
Rev Recd Date: 2015-10-16

Abstract

Abstract

Distributions of dissolved aluminum in the Changjiang Estuary and its adjacent area were investigated in two cruises carried out in March and July 2012. The monthly variations of dissolved aluminum in the Changjiang were investigated at Xuliujing from March of 2012 to November of 2013. At Xuliujing, the concentration of dissolved aluminum was maximun in the summer and minimum in the winter, corresponding to the seasonal variations of riverine runoff, with averages of (313±130) nmol/L and (140±43) nmol/L, respectively. Terrigenous material played a significant role on this area, dissolved aluminum concentrations in both surface and bottom waters decreased from the river mouth to the open sea. Dissolved aluminum concentrations in the surface and bottom waters ranged from 21 to 129 nmol/L and from 27 to 146 nmol/L in the March, with averages of (49±21) nmol/L and (59±27) nmol/L, respectively. Dissolved aluminum concentrations in the surface and bottom waters ranged from 6 to 332 nmol/L and from 9 to 252 nmol/L in the July, with averages of (66±69) nmol/L and (83±74) nmol/L, respectively. For dissolved aluminum, there were obvious seasonal variations between the spring and summer. The concentrations of dissolved Al in the bottom layer were significantly higher than the surface layer in the summer due to the desorption during the resuspension of bottom sediments, on the contrary in the spring. However, there wasn't significant difference between the surface and bottom layers in the spring. Dissolved aluminum showed a scavenging behavior in the Changjiang Estuary during the preliminary stage of mixing between salt and fresh water, and with a scavenging proportion of up to 55%.
- dissolved aluminum,
- distribution,
- seasonal variation,
- removal percentage,
- Changjiang Estuary

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