西太平洋海域现场培养实验中挥发性卤代烃浓度的变化及其影响因素

韩钰; 何真; 刘珊珊; 高旭旭; 杨桂朋

doi:10.3969/j.issn.0253-4193.2020.02.001

西太平洋海域现场培养实验中挥发性卤代烃浓度的变化及其影响因素

doi: 10.3969/j.issn.0253-4193.2020.02.001

韩钰^{1, 2,},
何真^{1, 2},
刘珊珊^{1, 2},
高旭旭^{1, 2},
杨桂朋^{1, 2, 3, ,}

1.
中国海洋大学化学化工学院，山东青岛 266100
2.
海洋化学理论与工程技术教育部重点实验室，山东青岛 266100
3.
青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室，山东青岛 266237

基金项目: 国家自然科学基金（41830534，41506088）；国家重点研发计划项目（2016YFA0601300）；中央高校基本科研业务费项目（201762030）；海洋国家实验室“鳌山人才”卓越科学家计划项目（2015ASTP-OS12）。

详细信息

作者简介:
韩钰（1995—），女，山东省威海市人，主要从事海洋界面化学方面的研究。E-mail：yuhan_yu1@163.com

通讯作者:
杨桂朋（1963—），男，教授，博士生导师，教育部“长江学者”，主要从事海洋化学研究。E-mail：gpyang@ouc.edu.cn

中图分类号: P734
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- 文章访问数: 477
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- 被引次数: 0
出版历程
- 收稿日期: 2019-03-07
- 修回日期: 2019-07-08
- 网络出版日期: 2020-11-13
- 刊出日期: 2020-02-25

Variation of volatile halocarbons concentrations and its influencing factors in incubation experiments in the western Pacific Ocean

Han Yu^{1, 2
,},
He Zhen^{1, 2},
Liu Shanshan^{1, 2},
Gao Xuxu^{1, 2},
Yang Guipeng^{1, 2, 3
, ,}

1.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Qingdao 266100, China
3.
Laboratory for Marine Ecology and Environment Science, Pilot National Laboratory for Marine Science and Technology (Qiangdao), Qingdao 266237, China

摘要

摘要: CH₃I、CHCl₃、C₂HCl₃和CH₂Br₂是挥发性卤代烃4种重要成分，对大气化学产生重要影响。于2018年10月在西太平洋进行船基现场培养实验，研究微量元素Fe (50 nmol/L)、酸化(pH=7.9)、酸化(pH=7.9)和微量元素Fe (50 nmol/L)耦合作用、微量元素Fe (50 nmol/L)和N/P (16∶1)耦合作用及沙尘(4 mg/L)对浮游植物释放CH₃I、CHCl₃、C₂HCl₃和CH₂Br₂含量的影响。结果表明，与对照组相比，实验组CH₃I、C₂HCl₃和CH₂Br₂的释放均被不同程度抑制；CHCl₃的释放除添加沙尘时表现抑制作用外，其他条件下均为促进作用；实验组培养周期内叶绿素a浓度较高，而营养盐浓度变化规律不明显。总的来说，酸化和微量元素Fe可能是影响浮游植物释放挥发性卤代烃的重要限制因素，沙尘对促进浮游植物生长繁殖的影响更为显著。
- 挥发性卤代烃 /
- 海洋酸化 /
- 沙尘 /
- 现场培养实验 /
- 西太平洋
Abstract: CH₃I, CHCl₃, C₂HCl₃ and CH₂Br₂ are the four important components of volatile halocarbons, which have important influence on atmospheric chemistry. To study the effect of Fe, ocean acidification, coupling effect of ocean acidification and Fe, coupling effect of Fe and N/P (16∶1) and dust on the concentrations of CH₃I, CHCl₃, C₂HCl₃ and CH₂Br₂ released by phytoplankton, an onboard incubation experiments was performed at the western Pacific Ocean in October 2018. Compared with the blank control experiment, the results show that the releases of CH₃I, C₂HCl₃ and CH₂Br₂ in the experimental groups are suppressed in some extent. While the release of CHCl₃ is promoted except when the dust is added. The concentration of Chl a is relatively high but the changes in nutrients concentrations are not obviously unconspicuous. In conclusion, the ocean acidification and iron fertilization might be the two virtual factors for phytoplankton to release volatile halocarbons. Besides, the growth of phytoplankton is affected significantly by the dust.
- volatile halocarbons /
- ocean acidification /
- dust /
- field incubation experiments /
- western Pacific Ocean

HTML全文

图 1 对照组（M1）及实验组（M2～M6）培养桶中营养盐浓度变化

Fig. 1 Variations in the concentrations of NO₃-N and PO₄-P in control group (M1) and experimental groups (M2−M6)

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图 2 对照组（M1）及实验组（M2～M6）培养桶中叶绿素a浓度变化

Fig. 2 Variations in the concentrations of Chl a in control group (M1) and experimental groups (M2−M6)

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图 3 对照组（M1），Fe添加组（M2）及Fe和N/P（16∶1）添加组（M5）培养桶内CH₃I （a）、 CHCl₃ （b）、 C₂HCl₃ （c）和CH₂Br₂ （d）浓度变化

Fig. 3 Variations in the concentrations of CH₃I （a）, CHCl₃ （b）, C₂HCl₃ （c） and CH₂Br₂ （d） in control group (M1), Fe addition group (M2) and Fe and N/P (16∶1) addition group (M5)

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图 4 对照组（M1），酸化组（M3）及Fe和酸化组（M4）培养桶内CH₃I （a）、 CHCl₃ （b）、 C₂HCl₃ （c）和CH₂Br₂ （d）浓度变化

Fig. 4 Variations in the concentrations of CH₃I （a）, CHCl₃ （b）, C₂HCl₃ （c） and CH₂Br₂ （d） in control group (M1), acidification group (M3) and Fe and acidification group (M4)

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图 5 对照组（M1），沙尘添加组（M6）培养桶内CH₃I （a）、 CHCl₃ （b）、 C₂HCl₃ （c）和CH₂Br₂ （d）浓度变化

Fig. 5 Variations in the concentrations of CH₃I （a）, CHCl₃ （b）, C₂HCl₃ （c） and CH₂Br₂ （d） in control group (M1) and dust addition group (M6)

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表 1 实验组和对照组添加物浓度及pH

Tab. 1 Concentrations of additives added to M2 to M6, the condition of M1, and pH

添加物	不同编号培养桶中添加物质浓度及pH
添加物	M1	M2	M3	M4	M5	M6
NO₃-N/µmol·L⁻¹	2.9	−	−	−	9.6	−
PO₄-P/µmol·L⁻¹	0.075	−	−	−	0.6	−
Fe/nmol·L⁻¹	N/A	50	−	50	50	−
沙尘/mg·L⁻¹	N/A	−	−	−	−	4
pH	8.2	−	7.9	7.9	−	−
注：− 表示无添加物质和未测pH，N/A表示未检测到此物质。

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