Volchek Konstantin, Thouin Geneviève, Kuang Wenxing, Li Ken, Tezel F Handan, Brown Carl E
Environment Canada, 335 River Road, Ottawa, ON, K1A0H3, Canada,
Environ Sci Pollut Res Int. 2014 Oct;21(20):11844-55. doi: 10.1007/s11356-014-2742-x. Epub 2014 Mar 21.
The release of the organochlorine pesticide lindane (γ-hexachlorocyclohexane) from several types of contaminated building materials was studied to assess inhalation hazard and decontamination requirements in response to accidental and/or intentional spills. The materials included glass, polypropylene carpet, latex-painted drywall, ceramic tiles, vinyl floor tiles, and gypsum ceiling tiles. For each surface concentration, an equilibrium concentration was determined in the vapour phase of the surrounding air. Vapor concentrations depended upon initial surface concentration, temperature, and type of building material. A time-weighted average (TWA) concentration in the air was used to quantify the health risk associated with the inhalation of lindane vapors. Transformation products of lindane, namely α-hexachlorocyclohexane and pentachlorocyclohexene, were detected in the vapour phase at both temperatures and for all of the test materials. Their formation was greater on glass and ceramic tiles, compared to other building materials. An empiric Sips isotherm model was employed to approximate experimental results and to estimate the release of lindane and its transformation products. This helped determine the extent of decontamination required to reduce the surface concentrations of lindane to the levels corresponding to vapor concentrations below TWA.
研究了几种受污染建筑材料中有机氯农药林丹（γ-六氯环己烷）的释放情况，以评估因意外和/或故意泄漏而产生的吸入危害和去污要求。这些材料包括玻璃、聚丙烯地毯、乳胶漆墙面、瓷砖、乙烯基地板砖和石膏天花板。对于每个表面浓度，测定了周围空气中气相的平衡浓度。蒸汽浓度取决于初始表面浓度、温度和建筑材料类型。空气中的时间加权平均（TWA）浓度用于量化与吸入林丹蒸汽相关的健康风险。在两个温度下以及所有测试材料的气相中均检测到林丹的转化产物，即α-六氯环己烷和五氯环己烯。与其他建筑材料相比，它们在玻璃和瓷砖上的形成量更大。采用经验性的西普斯等温线模型来近似实验结果，并估计林丹及其转化产物的释放量。这有助于确定将林丹表面浓度降低到对应于低于TWA的蒸汽浓度水平所需的去污程度。
