摘要
本文用室内海水-沉积物平衡箱研究了沉积物间隙水中铁、锰的垂直变化分布和随时间变化的分布,Fe^(2+)随深度、时间的变化幅度大,在六个月的实验期内均是如此,而Mn^(2+)在放置三个月后即趋于稳定;Fe^(2+),Mn^(2+)产生的宏观经验动力学表明:Fe^(2+)受pH影响远比Mn^(2+)大,且随着深度的增加更为明显,Fe^(2+)在较下层产生速率大,而Mn^(2+)反之;Fe^(2+)的扩散转移是上覆海水向沉积物中转移,扩散量为-60.7ug/m^2d,Nn^(2+)转移方向相反,扩散量为1746.2ug/m^2.d。
This paper described the vertical and timedistribution of iron and manganese in sediment interstitial waters by using 'Equilibria Box' of sediment-seawater system,and experimental dynamics of iron and manganese of production. The diffusion flux across sediment-water interface of iron and manganese has been estimated. Fe2+ is found to be varied at large range in depth and time change in total 6 months, but Mn2 + tends to reach a constant value after setting for three months. The experimental dynamics of iron and manganese production have shown that Fe2 + is more sensitive than Mn2+ by pH change. The deeper the sediment is, the larger the pH effect. The rate of production of Fe2+ is larger in deeper layer, but opposite for Mn2+.The diffusion flux for iron starts from overlying sea-water to sediment - 60.7μg/m2·d, for Mn2+ from sediment to overlying seawater 1746.2μg/m2·d.
出处
《环境化学》
CAS
CSCD
北大核心
1993年第1期29-35,共7页
Environmental Chemistry
关键词
海底沉积物
氧化还原反应
铁
锰
model experiment, redox process,experimental dynamics, interstitial water, iron, manganese.
