College of Environment and Resource, Jilin University, Changchun 130026, PR China.
J Hazard Mater. 2010 Apr 15;176(1-3):294-9. doi: 10.1016/j.jhazmat.2009.11.027. Epub 2009 Nov 11.
This paper deals with the influencing factors on removal of chlorobenzene from unsaturated soils by soil vapor extraction (SVE) method. A series of one-dimensional column experiments were conducted to study the influencing factors for SVE method, the factors included extracted vapor flow rate, soil grain size, extraction mode, soil organic matter content and water content. The results indicated that: (1) the increase of vapor flow rate led to higher contaminant removal efficiency, but the increment of removal was not significant at higher flow rate levels; (2) soil grain sizes had a great impact on chlorobenzene removal efficiency, the coarser the sand, the higher the removal rate; (3) pulsed vapor extraction and continuous vapor extraction almost had the same contaminant removal effects in the sand column; (4) the higher organic content in the soil could decrease the removal efficiency; (5) water content in the soil had different impact on the contaminant removal efficiency which related with the organic content in the soil.
本文研究了土壤气相抽提（SVE）法去除不饱和土壤中氯苯的影响因素。通过一系列一维柱实验，研究了 SVE 法的影响因素，包括提取蒸汽流速、土壤粒径、提取方式、土壤有机质含量和含水量。结果表明：（1）蒸汽流速的增加导致污染物去除效率更高，但在较高流速水平下，去除效率的增加并不显著；（2）土壤粒径对氯苯去除效率有很大影响，沙越粗，去除率越高；（3）脉冲蒸汽抽提和连续蒸汽抽提在砂柱中几乎具有相同的污染物去除效果；（4）土壤中较高的有机含量会降低去除效率；（5）土壤中的含水量对污染物去除效率有不同的影响，这与土壤中的有机含量有关。
