海洋溶解态黑碳的研究进展
Research Progress of Dissolved Black Carbon in Seawater
查看参考文献75篇
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文摘
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溶解态黑碳(DBC)作为黑碳(BC)降解的中间产物,是海洋溶解有机碳碳库的重要组分,涉及全球海洋碳收支并进一步影响全球气候变化;是有色溶解有机质的重要组分,可改变水体光学环境从而对生态系统产生影响;也是一类良好的有机配体,在环境中易与金属离子形成络合物从而影响金属污染物的行为与毒性。鉴于其在气候变化、生态和环境等方面的重要影响,近年来研究者越来越关注DBC,并取得了一些基础性成果。目前,在DBC的定性认识上还存在一些模糊区域,所以DBC还没有一个明确的定义,DBC只是一个术语,特指一类由浓缩稠环母体和亲水性取代基(主要为羧基)组成的复杂有机物。在DBC的来源方面,已有证据证明BC降解能够产生DBC;但DBC很可能还存在其他来源,仍需进一步研究确认。DBC主要随水体进行迁移,并已观察到了DBC的降解现象,但目前对DBC的降解机理及速率仍不了解。在定量分析方法上,由于DBC的极性很强,且与其共存的基质相当复杂,分析DBC具有很大的挑战,其中苯多羧酸分子标志物法(BPCA)是定量分析DBC很有前景的方法之一,但目前仍存在一些难点需要解决。DBC在全球不同水体中含量变化很大,但目前的数据相当有限,不足以全面评估DBC的储量和循环周期。从DBC的定性识别、来源、迁移转化、定量分析及含量分布等方面综述DBC的研究进展,重点讨论BPCA法定量DBC的研究现状及存在问题,并展望DBC的研究方向。 |
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其他语种文摘
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Dissolved Black Carbon (DBC) is a series of intermediate products from Black Carbon (BC) degradation. It is an important part of dissolved organic carbon pool which relates to oceanic carbon budget and thereby plays a key role in global climate change. DBC is probably the main component of chromophoric dissolved organic matter, which can absorb solar radiation and change the optical environment of water, and then influences the functions and structures of aquatic ecosystems. It is also an organic coordination center which can easily form complex with metal ions and then influences the fate and toxicity of metal pollutants. For these reasons, DBC has received more and more attentions in recent years and some basic knowledge on DBC is available for us. However, ①There is still ambiguity in qualitative DBC so that DBC is a terminology more than a definition specially to describe a series of complicated compounds which consists of condensed aromatics as parent core and substituted with hydrophilic groups (mainly carboxyl). ②BC degradation is not the only source of DBC, other sources are urgently needed to be confirmed. ③The quantification of DBC is a great challenge for the high polarity of DBC and the complex matrices, which are difficult to be separated with DBC. Using Benzene PolyCarboxylic Acids (BPCA) as molecule markers is a prospective method for the measurement of DBC, but there are still some problems that needed to be solved. ④The data on concentrations of DBC are sparse and varied in a wide range, making it difficult to estimate the pool and cycle period of DBC. This article summarizes the research progress in molecular level identification, sources, migration and transformation, measurement methods, concentrations and spatial distributions of DBC. One of the key points is the present status and problems of BPCA method. Finally, some suggestions are provided for further study. |
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来源
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地球科学进展
,2012,27(12):1326-1336 【核心库】
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关键词
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溶解态黑碳
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分子结构
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定量方法
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苯多羧酸
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地址
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1.
中国科学院烟台海岸带研究所, 中国科学院海岸带环境过程重点实验室, 山东, 烟台, 264003
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中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
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语种
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中文 |
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ISSN
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1001-8166 |
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学科
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海洋学 |
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基金
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国家自然科学基金面上项目
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中国科学院知识创新工程重要方向项目
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2011年中国科学院研究生科技创新和社会实践专项“海水溶解态黑碳分析方法的建立及其在渤海湾的应用”资助
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文献收藏号
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CSCD:4727142
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