| 盐度和pH对崇明东滩沉积物中NH+4释放的影响研究 |
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| 引用本文： | 刘培芳,陈振楼,刘杰.盐度和pH对崇明东滩沉积物中NH+4释放的影响研究[J].上海环境科学,2002,21(5):271-273. |
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| 作者姓名： | 刘培芳 陈振楼 刘杰 |
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| 作者单位： | 华东师范大学资源与环境科学学院地理系 上海200062
(刘培芳，陈振楼)，华东师范大学资源与环境科学学院地理系 上海200062(刘杰) |
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| 基金项目： | 国家自然科学基金资助项目,编号:40173030，国家自然科学基金重点项目,编号:40131020，国家教育部骨干教师计划资助项目，上海市教育发展基金会曙光计划资助项目。 |
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| 摘 要： | 采集长江口下游的崇明东滩沉积物样，通过实验模拟研究盐度和pH对沉积物中NH4^ 释放的影响。结果表明，潮滩沉积物中NH4^ 的释放受盐度和pH的共同控制。NH4^ 随着盐度的变化呈明显的“M”型双峰曲线，释放量最小出现在盐度为0‰。释放峰值出现在盐度为5‰、20‰。NH4^ 随着pH的释放规律因盐度环境和沉积物类型的不同而显著不同。NH4^ 的释放量与沉积物类型有关，沙性物质含量高的低潮滩沉积物中NH4^ 的释放量明显低于沙性物质少的中潮滩。
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| 关 键 词： | 崇明东滩 沉积物 盐度 NH4^＋释放 pH值 海洋监测 |
Study on Effects of Salinity and pH on NH+4 Release in East Chongming Tidal Flat Sediment |
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| Liu Peifang Chen Zhenlou Liu Jie.Study on Effects of Salinity and pH on NH+4 Release in East Chongming Tidal Flat Sediment[J].Shanghai Environmental Science,2002,21(5):271-273. |
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| Authors: | Liu Peifang Chen Zhenlou Liu Jie |
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| Abstract: | The regulatory effects of salinity and pH on NH4+ dynamics in tidal flat sediments have been studied in East Chongming tidal flat, using sediment slurries. It was demonstrated that the behavior of NH4+ was co-controlled by both factors on sediment-water interface. When salinity was increased, all curves of NH4+ release from sediments with a nadir at 0% and two peaks at 5% and 20% (or 25%) showed the similar trends. However, effects of pH on NH4+ release differed distinctly with salinity and the type of sediment. In addition, type of sediment affected the magnitude of release NH4+, resulted in the fact that its magnitude was always lower in low flat than that in middle flat. |
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| Keywords: | East Chongming tidal flat sediments Salinity pH NH4+ Release |
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