海水中锰的光化学反应研究

杨桂朋; 王玉珏; 胡立阁; 侯海军

海水中锰的光化学反应研究

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.
厦门大学, 环境科学研究中心, 福建, 厦门, 361005

基金项目: 国家自然科学基金项目(40176023);教育部科学技术研究重点项目(105105);教育部新世纪优秀人才支持计划(NCET-04-0643);山东省“泰山学者”建设工程专项经费(JS200510016)资助

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出版历程
- 收稿日期: 2006-08-08
- 修回日期: 2006-12-08

Study on the photochemical reaction of manganese in seawater

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
Environmental Science Research Center, Xiamen University, Xiamen 361005, China

摘要

摘要: 对海水中锰的光化学反应及其影响因素进行了研究.实验结果表明,锰的光化学反应主要通过有机物为媒介进行,反应液中加入的有机物种类和浓度的改变会导致锰的光化学反应速率的改变.增加光强,有利于锰的光还原反应的进行.降低体系的pH值,可提高锰的光反应速率.锰在不同介质中光反应速率从大到小的顺序为:去离子水、人工海水、天然海水.此外,搅拌有利于锰的光反应的进行,但在体系分布已达均匀的前提下,搅拌速率的大小对锰的光反应速率几乎无影响.研究表明,通过光化学反应,海水中的锰会由四价的颗粒态转化为二价的可溶态,从而有利于浮游植物的吸收和生长.
- 锰 /
- 光化学反应 /
- 影响因素 /
- 海水
Abstract: The photochemical reaction of manganese in seawater and its influencing factors were studied.The result indicated that the phot ochemical reduction of manganese occurred mainly via dissolved or ganic substances.The changes in the kinds as well as concentrations of organic substances could change the photoreaction rate of manganese in the solution.The increase in light intensity would be propitious to the photo reduction reaction of manganese.The decrease in the pH value of system could enhance the photoreaction rate of manganese.The photoreaction rates of manganese in different media were in the following sequence: deioned water > artificial seawater > natural seawater.Furthermore,the stirring action was necessary for the occurrence of the photoreaction of manganese.However,change in the stirring rate would produce little effect on the photoreaction rate of manganese after the system reached the even state.Our study showed that the photoreductive reaction of manganese in seawater could enhance the biological uptake of dissolved Mn(Ⅱ) and promote the algal growth.
- manganese /
- photoreaction /
- influencing factors /
- seawater

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参考文献(17)

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