Investigation on the Direct Transfer of SVOCs from Source to Settled Dust: Analytical Model and Key Parameter Determination

Wang Hao; Wang Haimei; Zhang XuankaiXiong JianyinLiu Xiaoyu

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Investigation on the Direct Transfer of SVOCs from Source to Settled Dust: Analytical Model and Key Parameter Determination

机译：Investigation on the Direct Transfer of SVOCs from Source to Settled Dust: Analytical Model and Key Parameter Determination

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摘要

Settled dust is an important medium for semivolatile organic compound(SVOC) transport indoors. Understanding the mechanism of interaction between SVOCsand settled dust can greatly improve the exposure assessment. This study develops ananalytical model to elucidate the mechanism of direct contact between SVOC sources andsettled dust. The model incorporates the adsorption of SVOCs onto indoor surfaces,which was ignored in previous numerical models. Based on this model, a hybridoptimization method is applied to determine the key parameters of SVOC transport, i.e.,the diffusion coefficient in the dust, the dust-air partition coefficient, and the chambersurface-air partition coefficient. Experiments of direct contact between SVOC sourcematerials containing organophosphorusflame retardants (OPFRs) and settled dust wereconducted in chambers. The key parameters were determined by performing curvefittingusing data collected from the OPFR chamber tests and from the literature on phthalates.The reliability and robustness of the model and measurement method are demonstratedby the highfitting accuracy and sensitivity analysis. The obtained key parameters are moreaccurate than those from correlations in prior studies. Further analysis indicates that dust-air partition coefficient plays an importantrole and the adsorption effect on surfaces cannot be neglected for SVOC transport.

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来源
《Environmental Science & Technology: ES&T》 |2022年第9期|5489-5496|共8页
作者
Wang Hao; Wang Haimei; Zhang XuankaiXiong JianyinLiu Xiaoyu;
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作者单位

Beijing Inst Technol;

US EPA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
settled dust; semivolatile organic compounds (SVOCs); direct contact; analytical model; key parameters; hybrid optimization; indoor air quality; SEMIVOLATILE ORGANIC-COMPOUNDS; ORGANOPHOSPHATE FLAME RETARDANTS; C-HISTORY METHOD; BUILDING-MATERIALS; INDOOR DUST; PARTITION-COEFFICIENTS; PREDICTING EMISSIONS; HUMAN EXPOSURE; MASS-TRANSFER; HOUSE-DUST;

Investigation on the Direct Transfer of SVOCs from Source to Settled Dust: Analytical Model and Key Parameter Determination

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