Scavenging mechanism of dissolved Al by phytoplankton: Inspiration from filed incubation experiments

Wang Zhaowei; Ren Jingling; Jin Jie; Liu Sumei; Shi Jinhui

doi:10.3969/j.issn.0253-4193.2015.02.009

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Wang Zhaowei, Ren Jingling, Jin Jie, Liu Sumei, Shi Jinhui. Scavenging mechanism of dissolved Al by phytoplankton: Inspiration from filed incubation experiments[J]. Haiyang Xuebao, 2015, 37(2): 85-92. doi: 10.3969/j.issn.0253-4193.2015.02.009

Citation:

Wang Zhaowei, Ren Jingling, Jin Jie, Liu Sumei, Shi Jinhui. Scavenging mechanism of dissolved Al by phytoplankton: Inspiration from filed incubation experiments[J]. Haiyang Xuebao, 2015, 37(2): 85-92. doi: 10.3969/j.issn.0253-4193.2015.02.009

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Scavenging mechanism of dissolved Al by phytoplankton: Inspiration from filed incubation experiments

doi: 10.3969/j.issn.0253-4193.2015.02.009

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Marine Environmental Science and Ecology, Ocean University of China, Ministry of Education of China, Qingdao 266010, China

Received Date: 2014-07-01
Rev Recd Date: 2014-08-22

Abstract

Abstract

The scavenging mechanism of dissolved Al by the growth of phytoplankton was investigated through field incubation experiments in the present study. The experiments were allocated into 4 groups: control group, N/P/Si-enrichment group, N/P/Si/Al-enrichment group and dust-enrichment group. The results showed that the phytoplankton cells growth rate of the control group was 0.48 d^-1, the two enrichment groups increased to 0.68 d^-1, the growth rate of the dust-enrichment group was between them. Nutrients were declining until exhausted in each groups during the incubation period. The concentration of dissolved Al decreased slowly in the control group and N/P/Si-enrichment group. Dissolved Al concentrations decreased 40% during the exponential growth phase of the N/P/Si/Al-enrichment group, and increased during decline phase. The concentration of dissolved Al increased steadily with time in the dust-enrichment group. Total and intra-cellular Al was differentiated using oxalate reagent (Oxalate-EDTA-Citrate). Results showed that the total Al and the intra-cellular Al content in the phytoplankton cells of the control group was (3.6±0.1) mg/g and (2.1±0.3) mg/g, respectively. In the N/P/Si/Al-enrichment group, it was increased to (5.1±0.3) mg/g and (3.2±0.4) mg/g. The growth of phytoplankton can remove dissolved Al in the ocean significantly, and its primary removal mechanism is absorption by phytoplankton cells, supplemented by adsorption by phytoplankton cells.
- dissolved Al,
- phytoplankton bloom,
- intra-cellular Al,
- filed incubation experiments,
- Yellow Sea

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References(39)

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