It has been reported that PCDD and PCDF concentrations within cement kiln dusts range between 0.4 and 2.6 parts per billion (ppb) (UNEP 2004b).
据报导，水泥窑内多氯二苯并对二恶英和 多氯二苯并呋喃的浓度为十亿分之0.4和2.6之间不等11 (环境署 2004b)。