VAPOR-PHASE CONCENTRATIONS OF ARSENIC, SELENIUM, BROMINE, IODINE, AND MERCURY IN THE STACK OF A COAL-FIRED POWER-PLANT

被引:91
作者
GERMANI, MS [1 ]
ZOLLER, WH [1 ]
机构
[1] UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLLEGE PK,MD 20742
关键词
Electric Power Plants--Fuels - Heavy Metals - Inorganic Compounds - Vapors--Concentration;
D O I
10.1021/es00174a013
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A sampling and analysis procedure is described for determining vapor-phase concentrations of As, Se, Br, I, and Hg in the stack of a coal-fired power plant. The percentages of the total in-stack concentrations for these elements present in the vapor phase are as follows: Br, 98%; Hg, 98%; Se, 59%; As, 0.7-52%; and I, ≥99%. A lower limit of 99% ws obtained for Cl. The vapor-phase concentration of As appears to be dependent upon the in-stack or filter mass loading. This indicates that a vaporization-condensation mechanism may control the vapor-phase concentrations of As. The results for Se indicate that the efficiency of the electrostatic precipitator affects particle vapor-phase fractionation. The results obtained in this study are compared with previous mass balance calculations.
引用
收藏
页码:1079 / 1085
页数:7
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