| 摘要: |
| 本文在黄渤海海域对β-二甲基巯基丙酸内盐(DMSP)降解产生丙烯酸和丙烯酸的降解过程做了初步研究。结果表明, 海水中有明显的DMSP 降解和丙烯酸的生成现象。在DMSP 降解初期,DMSP 不断降解, 丙烯酸则在经过1h 后浓度开始上升, 达到最大值后再次下降。起始DMSP 浓度越高, 降解得越完全, 且丙烯酸最大值越大。在观测的5h 内, 丙烯酸的表观降解速率总是大于DMSP的表观降解速率, 且两者都与初始浓度成正相关。在丙烯酸的降解过程中, 黑暗条件下起始浓度越大,丙烯酸变化速率越大, 而光照条件下则恰好相反。光化学反应中前2h 表现为丙烯酸的光化学生成,而后2h 表现为光化学降解。 |
| 关键词: 丙烯酸 β-二甲基巯基丙酸内盐(DMSP) 渤海 黄海 降解 |
| DOI：10.11693/hyhz20140500156 |
| 分类号: |
| 基金项目:国家自然科学基金项目,41176062号。 |
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| GENERATION AND DEGRADATION OF ACRYLIC ACID IN YELLOW SEA AND BOHAI SEA |
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LIU Huan-Huan, LIU Chun-Ying, Li Pei-Feng
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Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| We conducted in situ measurement onboard research vessel the degradation of dimethylsufoniopropionate (DMSP) into acrylic acid (AA) in two stations over the Yellow Sea and the Bohai Sea, during which DMSP degradation and AA generation in seawater were observed. At the initial stage, DMSP degraded continually, and AA concentration began to increase in 1h and declined when reached the maximum. The greater the initial concentration of DMSP was, the more AA was degraded, and the greater the maximum of AA was. The degradation rate of AA was higher than those of DMSP in the first 5h. The degradation rates of the two compounds were both proportional to the initial concentrations. In regard to the degradation rate of AA, it was proportional to the initial concentration in dark condition, and vise versa in illumination condition. In four-hour photochemical reaction, AA was photochemically produced in the first 2h and degraded in the last 2h. |
| Key words: acrylic acid dimethylsufoniopropionate (DMSP) the Bohai Sea the Yellow Sea degradation |
