CHLOROBENZENES AND CHLOROPHENOLS AS INDICATOR PARAMETERS FOR CHLORINATED DIBENZODIOXINS AND DIBENZOFURANS IN INCINERATION PROCESSES - INFLUENCES OF VARIOUS FACILITIES AND SAMPLING POINTS

2,3,7,8-Tetrachlorodibenzodioxin toxicity equivalents (I-TE) were clos ely correlated with the concentrations of other chloroaromatic compoun ds like pentachlorophenol, pentachlorobenzene, and hexachlorobenzene i n the flue gas of three waste incinerators, To predict I-TE from these indicator parameters, regression equations were established for diffe rent sampling points of three hazardous waste incinerators. The sampli ng points were located in the boiler, directly upstream and downstream of the electrostatic precipitator, and downstream of the wet scrubber . Typically, the slopes of the regression lines were similar for the d ifferent incinerators at a given sampling point, but the intercepts we re different, These findings indicate the possibility of transferring part of the regression results (the values of the slope) from one inci nerator to another. The intercept of the regression line, which can be different, can then be determined with only a few simultaneous measur ements of I-TE and the indicator compound.