胶州湾海水中溶解有色物质的光脱色对光致生成一氧化碳速率的影响

任春艳; 陆小兰; 杨桂朋; 田畕畾; 王为磊

胶州湾海水中溶解有色物质的光脱色对光致生成一氧化碳速率的影响

1.
中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛 266100;青岛农业大学化学与药学院,山东青岛 266109
2.
中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛 266100

基金项目: 国家杰出青年科学基金(40525017);国家自然科学基金(40606023;40976043);山东省科技发展计划项目(2006GG2205024);山东省"泰山学者"建设工程专项经费(JS200510016)。

计量
- 文章访问数: 1969
- HTML全文浏览量: 13
- PDF下载量: 1079
- 被引次数: 0
出版历程
- 收稿日期: 2009-06-19
- 修回日期: 2009-10-22

The influence of photoproduction rates of carbon monoxide by photobleaching of chromophoric dissolved organic matter in the Jiaozhou Bay

1.
Key Laboratory of Ministry of Education for Marine Chemistry Theory and Technology,Ocean University of China, Qingdao 266100,China;College of Chemistry & Pharmacy, Qingdao Agricultural University, Qingdao 266109,China
2.
Key Laboratory of Ministry of Education for Marine Chemistry Theory and Technology,Ocean University of China, Qingdao 266100,China

摘要

摘要: 利用在胶州湾中不同位置取得的3个水样,对溶解有色物质进行了不同时间的光脱色,探讨了有机物含量随脱色时间的变化趋势,得出有机物吸光系数和溶解有机碳随脱色时间的增长而呈指数减小,说明光脱色可以明显降低溶解有机物的含量。对不同光脱色程度的水样进行了光化学降解,测定了其主要产物一氧化碳的光致生成速率,发现在8个不同波段下一氧化碳光致生成速率与350 nm的吸光系数和溶解有机碳之间均有良好的线性关系。350 nm的吸光系数和溶解有机碳含量在一定程度上均可较好地表示海水中CDOM的含量。
- 溶解有色物质 /
- 光脱色 /
- 一氧化碳 /
- 光致生成
Abstract: The effects of content and photobleaching degrees of choromophoric dissolved organic matter were examined based on the photoproduction rates of carbon monoxide for three water samples collected at three different locations in the Jiaozhou Bay in Qingdao. The absorption coefficient of organic compounds and dissolved organic carbon all decreased with increasing time of photobleaching, suggesting that the content of dissolved organic matter significantly decreased through photobleaching. In all eight wave bands, the photoproduction rates of carbon monoxide were significantly correlated with the absorption coefficient at 350 nm and dissolved organic carbon content. Both absorption coefficient at 350 nm and dissolved organic carbon content can represent the contents of chromophoric dissolved organic matter to some extent.
- chromophoric dissolved organic matter /
- photobleaching /
- carbon monoxide /
- photoproduction

HTML全文

参考文献(17)

CONRAD R, SEILER W, BUNSE G, GIEHL H. Carbon monoxide in seawater (Atlantic Ocean)[J]. Journal of Geophysical Research, 1982, 87:8839—8852.

ZAFIRIOU O C, ANDREWS S S, WANG W. Concordant estimates of oceanic carbon monoxide source and sink processes in the Pacific yield a balanced global "blue-water" CO budget[J]. Global Biogeochemical Cycles,2003, 17(1):1015, Dio 10.1029/2001gb001638.

ZUO Y, JONES R D. Formation of carbon monoxide by photolysis of dissolved marine organic material and its significance in the carbon cycling of the ocean[J]. Naturwissenschaften, 1995, 82(10):472—474.

MILLER W L, ZEPP R G. Photochemical production of dissolved inorganic carbon from terrestrial organic matter:significance of the oceanic organic carbon cycle[J] Geophysical Reearch Letters, 1995, 22:417—420.

MOPPER K, ZHOU X L, KIEBER R J, et al. Photochemical degradation of dissolved organic carbon and its impact on the oceanic carbon cycle[J]. Nature, 1991, 353(6339):60—62.

JOHANNESSEN S C H. A photochemical sink for dissolved organic carbon in the ocean . Halifax, Nova Scotia:Dalhousie University (Canada), 2000.

VALENTINE R L, ZEPP R G. Formation of carbon monoxide from the photodegradation of terrestrial dissolved organic carbon in natural waters[J]. Environmental Science & Technology, 1993, 27(2):409—412.

ANDREWS S S, CARON S, ZAFIRIOU O C. Photochemical oxygen consumption in marine waters: a major sink for colored dissolved organic matter[J] Limnology and Oceanography, 2000, 45(2):267—277.

XIE H X, STEVEN S Andrews, WILLIAM R Martin, et al. Validated methods for sampling and headspace analysis of carbon monoxide in seawater[J]. Marine Chemistry, 2002, 77:93—108.

LOH A.N., BAYER J E, DRUFFEL E R M. Variable ageing and storage of dissolved organic components in the open ocean[J]. Nature, 2004, 430:877—881.

吴永森,张士魁,张绪琴,等.海水黄色物质光吸收特性实验研究[J],海洋与湖沼,2002, 33(4):402—406.

楼涛.溶解有机物的光化学过程模拟及其对环境污染物结合性质的影响研究 .青岛:中国海洋大学,2005.

MANNINO A, HARVEY H R. Biochemical composition of particles and dissolved organic matter along an estuarine gradient: sources and implications for DOM reactivity[J]. Limnology and Oceanography, 2000, 45(4):775—788.

MCKNIGHT D M, HARNISH R, WERSHAW R L, et al. Chemical characteristics of particulate, colloidal and dissolved organic material in Loch Vale Watershed, Rocky Mountain National Park[J]. Biogeochemistry, 1997, 36(1):99—124.

张永.加拿大圣劳伦斯河口水中一氧化碳的生物地球化学循环 .青岛:中国海洋大学,2008.

INGRID Obernosterer, RONALD Benner.Competition between biological and photochemical processes in the mineralization of dissolved organic carbon[J].Limnology and Oceanography, 2004, 49(1):117—124.

VAHATALO A V, SALKINOJA-SALONEN M, TAALAS P, et al. Spectrum of the quantum yield for photochemical mineralization of dissolved organic carbon in humic lake[J].Limnology and Oceanography, 2000, 45(2):664—676.

施引文献

资源附件(0)

访问统计