CAJ | 학술논문

对长江口南翼上海滨岸带三个站点潮滩上覆水、沉积物和间隙水中的三态无机氮的含量分布的年度季节性监测研究表明:潮滩上覆水中溶解无机氮以NO3-N为主;表层沉积物中可交换态无机氮以NH4-N为主,约占70%～85%;沉积物间隙水中主要无机氮为NH4-N 和 NO3-N. 在冬季潮滩上覆水中硝态氮含量明显降低,而沉积物和间隙水中氨氮和硝态氮的浓度则有较大增加. 初步探讨了潮滩水和沉积物中无机氮分布季节性变化的主要影响因素,估算了潮滩表层沉积物-水界面无机氮的扩散通量,指出NH4-N的扩散释放对滨岸水环境质量影响较大.
대장강구남익상해빈안대삼개참점조탄상복수、침적물화간극수중적삼태무궤담적함량분포적년도계절성감측연구표명:조탄상복수중용해무궤담이NO3-N위주;표층침적물중가교환태무궤담이NH4-N위주,약점70%～85%;침적물간극수중주요무궤담위NH4-N 화 NO3-N. 재동계조탄상복수중초태담함량명현강저,이침적물화간극수중안담화초태담적농도칙유교대증가. 초보탐토료조탄수화침적물중무궤담분포계절성변화적주요영향인소,고산료조탄표층침적물-수계면무궤담적확산통량,지출NH4-N적확산석방대빈안수배경질량영향교대.
In 1998-1999, contents of inorganic nitrogen (NH4-N, NO3-N and NO2-N) in water and sediment of intertidal flats of Shanghai coast were investigated at three stations (CY, DH and LY). It presents that, the main form of inorganic nitrogen in water of intertidal flats is NO3-N with a wide range (37.2-226.1 μmol*L-1); most of exchangeable N in surface intertidal sediments is NH4-N, accounting for 70%-85%; NH4-N and NO3-N are the main form of inorganic N in pore water of surface sediments. Content distributions of NH4-N, NO3-N and NO2-N in water and sediment of intertidal flats vary seasonally. The basic factors affecting the seasonal variation of inorganic N have been discussed. Moreover, the diffusion fluxes of NH4-N, NO3-N and NO2-N between water and intertidal sediment interface have been estimated, and it indicates that NH4-N in sediments may play an important role in the Yangtze estuarine and coastal environment.