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Sorption of Organophosphate Flame Retardants onPahokee Peat Soil

机译:有机磷阻燃剂在帕霍基泥炭土壤上的吸附

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摘要

Organophosphate flame retardants (OPFRs) are classified as re-emerging pollutants and studies on their environmental fate, e.g., sorption behavior on soil are still limited. In this paper, three kinds of OPFRs, tri (n-butyl) phosphate (TnBP), tris (2-butoxyethyl) phosphate (TBEP), and tris (2-chloroethyl) phosphate (TCEP) were selected and their sorption properties on Pahokee peat soil with high organic matter were investigated by solid phase micro-extraction coupled with gas chromatography-mass spectrometry. The sorption kinetics of TnBP, TBEP, and TCEP was found to confirm to the pseudo-secondorder kinetic model and the sorption rate was controlled by boundary layer diffusion. The Langmuir isotherm model expressed the sorption equilibrium data well, in which TnBP exhibited the strongest affinity to Pahokee peat soil followed by TBEP and TCEP. Sorption thermodynamics indicated that lower temperature was beneficial to the sorption process.
机译:有机磷酸酯阻燃剂(OPFRs)被归类为重新出现的污染物,并且对其环境命运(例如在土壤上的吸附行为)的研究仍然有限。本文选择了三种OPFRs,磷酸三正丁酯(TnBP),磷酸三(2-丁氧基乙基)酯(TBEP)和磷酸三(2-氯乙基)酯(TCEP)并对其在Pahokee上的吸附性能进行了研究。固相微萃取-气相色谱-质谱法研究了高有机质的泥炭土。发现TnBP,TBEP和TCEP的吸附动力学证实了拟二级动力学模型,并且吸附速率受边界层扩散控制。 Langmuir等温线模型很好地表达了吸附平衡数据,其中TnBP对Pahokee泥炭土表现出最强的亲和力,其次是TBEP和TCEP。吸附热力学表明较低的温度有利于吸附过程。

著录项

  • 来源
    《Clean》 |2016年第9期|1163-1173|共11页
  • 作者单位

    Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, P. R. China;

    Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, P. R.China;

    Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, P. R.China;

    Federal Institute for Geosciences and Natural Resources, Hannover,Germany;

    Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, P. R.China;

    Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, P. R.China;

    Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, P. R.China;

    Department of Civil Engineering, University of Nebraska-Lincoln at Omaha Campus, NE, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Gas chromatography-mass spectrometry; Organophosphate flame retardants; Soil; Sorption;

    机译:气相色谱-质谱法;有机磷酸酯阻燃剂;土壤;吸附;

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