沉积物充气过程对锌的影响

在缺氧沉积物中，酸可挥发硫（ＡＶＳ）是总硫含量中的一个活性最大的部分。它控制着还原状态沉积物内孔隙水的重金属浓度又通过与重金属形成硫化物，影响着沉积物中重金属的形态。现已证明，ＡＶＳ与重金属反应是重要方面。ＡＶＳ的变化来自人类活动和自然现象。本项研究通过对香港河流和海湾沉积物３２ｄ的连续充气实验，探索硫含量变化对Ｚｎ对影响。

EFFECT OF AERATION OF HONG KONG SEDIMENT OF RIVERS, BAY ON ZINC BINDING

Acid-volatile sulfide (AVS) has been shown to be the part of activity the lagest of todal sulfide content in anoxic sediments. Acid-volatile sulfide (AVS) controls concentration of heavy metals in pore water of reduction phase sediments and it form sulfide with heavy metals again, and effects shape of heavy metals in sediments. Sutdy has been proven to be the dominant phase AVS reacting with heavy metals. Change of AVS can occur either through human activities, such as dredging waterways and harbors, or by natural phenoment, such as resuspenslon due to storms and changes in sediment chemistry. The study passed a series of laboratory aeration experiments for 32 days, effect of probe the change of sulfide content on zinc. The result shows: aeration of sediments results in rapid decrease of the AVS. At the same time, Zn, Eh, Do, pH happened clear change trend again.