THE TRACE-METAL DISSOLUTION KINETICS OF 3 RURAL ATMOSPHERIC AEROSOLS IN A RANGE OF NATURAL FRESH-WATER TYPES

被引:15
作者
HAMILTONTAYLOR, J
YANG, YL
AREWGODA, CM
HEWITT, CN
DAVISON, W
机构
[1] Institute of Environmental and Biological Sciences, Lancaster University, Lancaster
基金
英国自然环境研究理事会;
关键词
TRACE METALS; ATMOSPHERIC AEROSOLS; DISSOLUTION; KINETICS; SURFACE WATERS;
D O I
10.1016/0043-1354(93)90082-S
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The dissolution kinetics of Pb, Zn and Cu from three rural atmospheric aerosols were studied in a range of natural fresh waters and a synthetic analogue, employing two different experimental systems and analytical techniques (AAS and ASV). The experiments showed that high proportions (27-87% by mass) of the metal contents were rapidly (minutes) released into true solution (i.e. ASV labile), and that after 30 min there was little or no further dissolution, even after 1 week. The extent of Zn (74 +/- 8%) dissolution was invariably greater than that of Pb (41 +/- 15%) and Cu (47 +/- 11%), and dissolution of Pb and Zn increased with decreasing pH. There was no evidence for any increased dissolution associated with dissolved organics.
引用
收藏
页码:243 / 254
页数:12
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