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首页> 外文期刊>Environmental Science & Technology >Identification and Elimination of Fluorinated Methylsiloxanes in Environmental Matrices near a Manufacturing Plant in Eastern China
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Identification and Elimination of Fluorinated Methylsiloxanes in Environmental Matrices near a Manufacturing Plant in Eastern China

机译：东部制造工厂附近环境基质中的氟化甲基硅氧烷的鉴定和消除

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摘要

Fluorinated methylsiloxanes are modified methylsiloxanes and include tris(trifluoropropyl)trimethylcyclotrisiloxane (D3F) and tetrakis(trifluoropropyl)tetramethylcyclotetrasiloxane (D4F). Here, we report fluorinated methylsiloxanes (D3F and D4F) in surface water and sediment samples collected near a fluorinated methylsiloxane manufacturing plant in Weihai, China. The concentrations of D3F and D4F in surface water ranged from 3.29-291 ng/L and from 7.02-168 ng/L, respectively. The concentrations of D3F and D4F in sediment ranged from 11.8-5478 ng/g and from 17.2-6277 ng/g, respectively. In simulation experiment, the half-lives of D3F and D4F at different pH values (5.2, 6.4, 7.2, 8.3, and 9.2) varied from 80.6-154 h and from 267-533 h, respectively. CF3(CH2)(2)MeSi(OH)(2) was identified as one of the main hydrolysis products of fluorinated methylsiloxanes. It was also detected in the river samples at concentrations of 72.1-182.9 ng/L. In addition, the slow rearrangement of D3F (spiked concentration = 500 ng/L) to D4F (concentration = 11.0-22.7 ng/L) was also found during 336h hydrolysis experiment.
机译：氟化甲基硅氧烷是改性的甲基硅氧烷，并且包括三（三氟丙基）三甲基环三硅氧烷（D3F）和四（三氟丙基）四甲基环四硅氧烷（D4F）。在这里，我们报告了在中国威海的一家氟化甲基硅氧烷制造厂附近收集的地表水和沉积物样品中的氟化甲基硅氧烷（D3F和D4F）。地表水中D3F和D4F的浓度分别为3.29-291 ng / L和7.02-168 ng / L。沉积物中D3F和D4F的浓度分别为11.8-5478 ng / g和17.2-6277 ng / g。在模拟实验中，D3F和D4F在不同pH值（5.2、6.4、7.2、8.3和9.2）下的半衰期分别为80.6-154 h和267-533 h。 CF3（CH2）（2）MeSi（OH）（2）被确定为氟化甲基硅氧烷的主要水解产物之一。在河流样品中也检测到浓度为72.1-182.9 ng / L。此外，在336h水解实验中，还发现D3F（加标浓度= 500 ng / L）到D4F（浓度= 11.0-22.7 ng / L）的缓慢重排。

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  • 来源
    《Environmental Science & Technology》 |2018年第21期|12235-12243|共9页
  • 作者

    Zhi Liqin; Xu Lin; Qu Yao; Zhang Chunhui; Cao Dong; Cai Yaqi;

  • 作者单位

    Environm Protect Res Inst Light Ind, Beijing 100089, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China;

    Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Hubei, Peoples R China;

    China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R 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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