DIURNAL AND SEASONAL DISTRIBUTION OF HYDROGEN-PEROXIDE IN SEAWATER OF THE SETO INLAND SEA
DIURNAL AND SEASONAL DISTRIBUTION OF HYDROGEN-PEROXIDE IN SEAWATER OF THE SETO INLAND SEA
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DOI：
10.2343/geochemj.27.103
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发表时间：
1993-01-01
影响因子：
0.8
通讯作者：
TSUBOTA, H
中科院分区：
文献类型：
--
作者：
FUJIWARA, K;USHIRODA, T;TSUBOTA, H
在阳光充足的条件下，测定了濑户内海广岛湾海水中的过氧化氢。过氧化氢的浓度与太阳辐射强度成正比。强生物活性下的光化学反应可能是造成过氧化氢浓度日变化和季节变化的主要原因。濑户内海过氧化氢的空间分布与盐度有较好的相关性，说明产生过氧化氢的光敏剂是来自河水的物质。利用YAG激光三次谐波（355nm: 60 mJ）照射Seto内海采集的海水，产生水合电子作为光化学反应中过氧化氢的可能前体，其生成量与海水中总有机碳（TOC）和溶解有机碳（DOC）呈正相关。添加EDTA后，这种相关性得到了极大的改善。EDTA处理表明，某些物种的存在阻碍了过氧化氢的产生。用荧光物质代替TOC或DOC时，相关系数有所提高。
Hydrogen peroxide was determined in seawater at the Hiroshima Bay, the Seto Inland Sea under sunny conditions. Concentration of hydrogen peroxide was in accordance with the intensity of the solar radiation. Photochemical production under strong biological activity might be responsible for the profiles of the diurnal and seasonal variation of hydrogen peroxide concentration. The spatial distribution of hydrogen peroxide in the Seto Inland Sea gave a good correlation with salinity, suggesting that the photosensitizer to produce hydrogen peroxide was substances brought from river waters.Hydrated electron as a possible precursor of hydrogen peroxide in the photochemical reaction was generated in seawater collected at the Seto Inland Sea by means of irradiating the third harmonic wave of the YAG laser (355 nm: 60 mJ): The amount generated showed a positive correlation against total organic carbon (TOC) and dissolved organic carbon (DOC) in seawater. This correlation was greately improved by the addition of EDTA. The EDTA treatment suggests the existence of some species obstructed the hydrogen peroxide production. Also, this correlation coefficient was improved when taking fluorescent matter instead of TOC or DOC.