上海大学学报(自然科学版) ›› 2022, Vol. 28 ›› Issue (1): 49-56.doi: 10.12066/j.issn.1007-2861.2331

• 研究论文 • 上一篇    下一篇

华东某水库表层沉积物氨氮释放贡献量分析

朱宜平1, 高佩玥2, 赵一赢2, 王菲菲2, 黄鑫2(), 李怀正3   

  1. 1.上海城投原水有限公司, 上海 200125
    2.上海大学 环境与化学工程学院, 上海 200444
    3.同济大学 环境科学与工程学院, 上海 200092
  • 收稿日期:2021-02-25 出版日期:2022-02-28 发布日期:2022-03-02
  • 通讯作者: 黄鑫 E-mail:huangxin2008@shu.edu.cn
  • 作者简介:黄 鑫(1980—), 男, 教授, 博士生导师, 博士, 研究方向为饮用水处理理论与技术, 水系统与水规划. E-mail: huangxin2008@shu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51678351);陈行水库避污蓄清优化调度研究与应用(KY.YS.19.0001,CS.JS.002G.08B.2015-0)

Ammonia nitrogen release from surface sediment of a reservoir in East China

ZHU Yiping1, GAO Peiyue2, ZHAO Yiying2, WANG Feifei2, HUANG Xin2(), LI Huaizheng3   

  1. 1. Shanghai Chengtou Raw Water Co., Ltd., Shanghai 200125, China
    2. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
    3. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
  • Received:2021-02-25 Online:2022-02-28 Published:2022-03-02
  • Contact: HUANG Xin E-mail:huangxin2008@shu.edu.cn

摘要:

通过对华东某水库进行现场水样采样, 并结合沉积物氨氮释放试验, 分析水库典型区域表层沉积物、上覆水和间隙水中总氮、氨氮含量, 揭示氮素组成的时空分布特征和表层沉积物对上覆水氨氮的影响. 结果表明: 库内氨氮和总氮呈现明显的季节变化, 且冬季明显高于夏季; 表层沉积物中总氮的质量浓度高于上覆水, 沉积物氨氮扩散通量为 0.18$\sim$0.53 mg/(m$^{2}\cdot $d), 低于污染严重水库一个数量级; 底泥-间隙水-上覆水的氨氮热力学分配过程中, 表层沉积物对氨氮具有吸附作用, 可一定程度上缓冲突发氨氮污染问题, 但水流强扰动也能短时促进底泥中氨氮向水体扩散.

关键词: 沉积物, 上覆水, 间隙水, 氮转化, 吸附, 解吸

Abstract:

To determine the contribution of ammonia nitrogen release from the surface sediments of reservoirs, the total nitrogen and ammonia nitrogen contents in surface sediments ($<$10 cm), overlying water, and interstitial water in typical areas of a reservoir were analyzed via on-site sampling of a reservoir in East China combined with an ammonia nitrogen release test, which revealed the temporal and spatial distribution characteristics of nitrogen in the reservoir sediments. The results showed that the ammonia nitrogen and total nitrogen contents in the reservoir showed clear seasonal changes, and the total nitrogen concentration in the surface sediment was higher than that in the summer. The total nitrogen concentration in the surface sediment was higher than that in the overlying water, and the ammonia nitrogen diffusion flux in the sediment was 0.18$\sim$0.53 mg/(m$^{2}\cdot $d), which was one order of magnitude lower than that of a heavily polluted reservoir. During the thermodynamic distribution of ammonia nitrogen in the sediment-interstitial water-overlying water, the surface sediment had an adsorption effect on ammonia nitrogen, which could buffer the sudden ammonia nitrogen pollution problem to a certain extent; however, the strong disturbance of the water flow could also promote the diffusion of ammonia nitrogen in the sediment to the water body in a short time.

Key words: sediment, overlying water, interstitial water, nitrogen conversion, adsorption, desorption

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