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首页> 外文期刊>Environmental Science & Technology >Occurrence of Cyclic and Linear Siloxanes in Indoor Dust from China, and Implications for Human Exposures
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Occurrence of Cyclic and Linear Siloxanes in Indoor Dust from China, and Implications for Human Exposures

机译:中国室内粉尘中环状和线型硅氧烷的发生及其对人体暴露的影响

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摘要

Siloxanes are used in a wide variety of personal-care and other consumer products. Although there is clearly a potential for contamination of indoor dust with siloxanes, reports of occurrence of siloxanes in indoor dust were not available, prior to the present study. Here, we have determined the concentrations and profiles of four cyclic siloxanes, octameth-ylcyclotetrasiloxane (D_4), decamethylcyclopentasiloxane (D_5), dodecamethylcyclohexasiloxane (D_6), and tetradecameth-ylcycloheptasiloxane (D_7), as well as 11 linear siloxanes, from U~L_(14). in 100 dust samples collected in China. Cyclic and linear siloxanes were found in all dust samples, with the linear siloxanes L_9-L_(14) being the predominant compounds. Concentrations of total siloxanes in dust ranged from 21.5 to 21 000 (mean: 1540 ± 2850) ng g~(-1) The highest concentration of the individual linear siloxanes, L_9-L_(14)ranged between 2680 and 6170 ng g~(-1). Concentrations of total linear siloxanes (TLS) were 1-2 orders of magnitude higher than concentrations of total cyclic siloxanes (TCS), in all indoor dust samples. Siloxane concentrations in dust were associated with the number of electrical/electronic appliances, number of occupants, and smokers living in the house. Based on the measured siloxane concentrations and on estimated daily ingeston rates of dust by toddlers and adults, we calculated the daily intake of siloxanes. For adults, daily exposure to total siloxanes, based on an average dust intake rate and median exposure concentration, was calculated to be 15.9 ng day~(-1) the corresponding value for toddlers was 32.8 ng d~(-1).
机译:硅氧烷用于多种个人护理和其他消费产品。尽管显然有可能在室内灰尘中被硅氧烷污染,但在本研究之前,尚无关于在室内灰尘中出现硅氧烷的报道。在这里,我们从U〜L_确定了四种环状硅氧烷,八甲基硅氧烷基环四硅氧烷(D_4),十甲基环戊硅氧烷(D_5),十二甲基环六硅氧烷(D_6)和十四甲基甲基环庚硅氧烷(D_7)的浓度和分布以及11种线性硅氧烷的浓度和分布(14)。在中国收集的100个粉尘样本中在所有粉尘样品中都发现了环状和线性硅氧烷,其中主要的化合物是线性硅氧烷L_9-L_(14)。粉尘中总硅氧烷的浓度为21.5至21000(平均值:1540±2850)ng g〜(-1)单个线性硅氧烷的最高浓度L_9-L_(14)为2680至6170 ng g〜( -1)。在所有室内灰尘样品中,总线性硅氧烷(TLS)的浓度比总环状硅氧烷(TCS)的浓度高1-2个数量级。灰尘中硅氧烷的浓度与居住在房屋中的电气/电子设备的数量,居住者的数量以及吸烟者的数量有关。根据测得的硅氧烷浓度和估计的幼儿和成年人每日摄入粉尘的比率,我们计算了硅氧烷的每日摄入量。对于成年人,根据平均粉尘摄入率和中值暴露浓度,每天与总硅氧烷的接触量经计算为15.9 ng·d-1(-1),相应的幼儿值为32.8 ng d·(-1)。

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  • 来源
    《Environmental Science & Technology》 |2010年第16期|p.6081-6087|共7页
  • 作者单位

    School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China rnWadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, EmpireState Plaza, PO Box 509, Albany, New York 12201-0509;

    rnSchool of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;

    rnWadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, EmpireState Plaza, PO Box 509, Albany, New York 12201-0509;

    rnSchool of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;

    rnWadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, EmpireState Plaza, PO Box 509, Albany, New York 12201-0509;

    rnWadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, EmpireState Plaza, PO Box 509, Albany, New York 12201-0509rnInternational Joint Research Center for Persistent ToxicSubstances, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology,Harbin 150090, China;

  • 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);
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