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  

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

作　　者：任春艳[1,2] 陆小兰[1] 杨桂朋[1] 田畕畾 王为磊[1] 

机构地区：[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 [2]青岛农业大学化学与药学院,山东青岛266109

出　　处：《海洋学报》2010年第2期66-72,共7页

基　　金：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)

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。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.

关 键 词：溶解有色物质 光脱色 一氧化碳 光致生成 

分 类 号：O644.1[理学—物理化学]