CARBON SPECIATION AND SURFACE-TENSION OF FOG

被引:88
作者
CAPEL, PD
GUNDE, R
ZURCHER, F
GIGER, W
机构
[1] SWISS FED INST WATER RESOURCES & WATER POLLUT CONTROL,CH-8600 DUBENDORF,SWITZERLAND
[2] SWISS FED INST TECHNOL,DEPT IND & ENGN CHEM,CH-8092 ZURICH,SWITZERLAND
关键词
D O I
10.1021/es00075a017
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The speciation of carbon (dissolved/particulate, organic/inorganic) and surface tension of a number of radiation fogs from the urban area of Zurich, Switzerland, were measured. The carbon species were dominated by “dissolved” organic carbon (DOC; i.e., the fraction that passes through a filter), which was typically present at levels of 40-200 mg/L. Less than 10% of the DOC was identified as specific individual organic compounds. Particulate organic carbon (POC) accounted for 26-41 % of the mass of the particles, but usually less than 10% of the total organic carbon mass. Inorganic carbon species were relatively minor. The surface tensions of all the measured samples were less than pure water and were correlated with their DOC concentrations. The combination of high DOC and POC and low surface tension suggests a mechanism for the concentration of hydrophobic organic contaminants in the fog droplet, which have been observed by numerous investigators. © 1990, American Chemical Society. All rights reserved.
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页码:722 / 727
页数:6
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