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土壤因子对三氯乙烯土-气分配系数的影响

王兴华 李小倩 谢晓涵 何宁洁 喻涵雨

王兴华, 李小倩, 谢晓涵, 何宁洁, 喻涵雨. 土壤因子对三氯乙烯土-气分配系数的影响[J]. 地质科技通报, 2024, 43(5): 272-278. doi: 10.19509/j.cnki.dzkq.tb20240028
引用本文: 王兴华, 李小倩, 谢晓涵, 何宁洁, 喻涵雨. 土壤因子对三氯乙烯土-气分配系数的影响[J]. 地质科技通报, 2024, 43(5): 272-278. doi: 10.19509/j.cnki.dzkq.tb20240028
WANG Xinghua, LI Xiaoqian, XIE Xiaohan, HE Ningjie, YU Hanyu. Impact of soil factors on soil-gas partition coefficient of trichloroethylene[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 272-278. doi: 10.19509/j.cnki.dzkq.tb20240028
Citation: WANG Xinghua, LI Xiaoqian, XIE Xiaohan, HE Ningjie, YU Hanyu. Impact of soil factors on soil-gas partition coefficient of trichloroethylene[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 272-278. doi: 10.19509/j.cnki.dzkq.tb20240028

土壤因子对三氯乙烯土-气分配系数的影响

doi: 10.19509/j.cnki.dzkq.tb20240028
基金项目: 

国家重点研发计划项目 2020YFC1807101

详细信息
    作者简介:

    王兴华, E-mail: wangxinghua910@163.com

    通讯作者:

    李小倩, E-mail: lixiaoqian@cug.edu.cn

  • 中图分类号: X53

Impact of soil factors on soil-gas partition coefficient of trichloroethylene

More Information
  • 摘要:

    土壤-空气(简称土-气)分配是影响挥发性有机污染物环境归宿的重要环节,是形成呼吸暴露风险的重要过程。以黄土、红土、黑土和砂土4种典型土壤为研究对象,识别了影响三氯乙烯土-气分配的土壤因子,并通过单因素控制批实验定量探究了三氯乙烯在土-气界面的分配行为,构建了三氯乙烯土-气分配系数与土壤因子的定量关系。结果表明,4种典型土壤原样的三氯乙烯土-气分配系数存在显著差异(黑土>红土>砂土>黄土),黑土分配系数的影响因子主要是土壤粒径、含水率、有机质含量,其他3种土壤分配系数的影响因子主要是土壤粒径、含水率。黑土中三氯乙烯的土-气分配系数(KSA)与土壤影响因子的关系可定量表示为:KSA=-0.744X1-0.224X2+0.704X3; 而在砂土中为:KSA=-0.724X1-0.222X2;在黄土中为:KSA=-0.291X1-0.268X2;在红土中为:KSA=-0.589X1-0.338X2(X1为土壤含水率;X2为粒径;X3为有机质含量)。研究成果有利于深入认识三氯乙烯在我国典型土壤中土-气界面上的分配行为及土壤因子对其产生影响的规律,为土-气分配过程中多因素耦合影响量化和健康风险评估提供理论依据。

     

  • 图 1  实验反应装置示意图

    Figure 1.  Schematic diagram of experimental reaction device

    图 2  TCE吸附动力学曲线

    Figure 2.  Adsorption kinetic curve of TCE

    图 3  典型土壤的TCE土-气分配系数(KSA)

    Figure 3.  Soil-gas partition coefficient (KSA) of TCE in typical soil

    图 4  土壤粒径(a)、含水率(b)与TCE土-气分配系数的关系

    Figure 4.  Relationship between soil particle size(a), moisture(b) and soil-gas partition coefficient of TCE

    图 5  黑土KSA与有机质含量的关系及拟合曲线图

    Figure 5.  Relationship between the soil-gas partition coefficient of TCE the organic matter content of black soil and the fitting curve

    表  1  土壤物理化学指标

    Table  1.   Physical and chemical indicators of soil

    土壤物理化学性质指标 黄土 砂土 红土 黑土
    有机质wB/% 0.016 5 0.396 0.155 18.354
    土壤最大持水能力/% 44.8 41.0 52.5 130.1
    平均粒度/μm 19.04 8.61 8.69 36.96
    BET比表面积/(m2·g-1) 19.10 11.38 45.27 1.72
    矿物种类和质量分数/% 蒙脱石 1.20 2.65
    伊利石 6.90 17.20 4.95 14.20
    角闪石 0.80 1.20
    高岭石 4.35
    绿泥石 12.10 11.05 8.50
    石英 38.30 43.55 39.90 41.90
    钾长石 3.65 3.35 0.80 3.10
    斜长石 16.00 21.00 2.80 32.30
    方解石 21.40 1.45
    三水铝石 29.25
    锐钛矿 1.40
    白云石 0.85
    赤铁矿 13.90
    注:表中“—”表示未检出
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-01-22
  • 录用日期:  2024-05-06
  • 修回日期:  2024-04-29

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