Amin Mohammad Mehdi, Hatamipour Mohammad Sadegh, Momenbeik Fariborz, Nourmoradi Heshmatollah, Farhadkhani Marzieh, Mohammadi-Moghadam Fazel
Environment Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
Chemical Engineering Department, Faculty of Engineering, University of Isfahan, Isfahan, Iran.
ScientificWorldJournal. 2014 Jan 23;2014:416752. doi: 10.1155/2014/416752. eCollection 2014.
The integration of bioventing (BV) and soil vapor extraction (SVE) appears to be an effective combination method for soil decontamination. This paper serves two main purposes: it evaluates the effects of soil water content (SWC) and air flow rate on SVE and it investigates the transition regime between BV and SVE for toluene removal from sandy soils. 96 hours after air injection, more than 97% removal efficiency was achieved in all five experiments (carried out for SVE) including 5, 10, and 15% for SWC and 250 and 500 mL/min for air flow rate on SVE. The highest removal efficiency (>99.5%) of toluene was obtained by the combination of BV and SVE (AIBV: Air Injection Bioventing) after 96 h of air injection at a constant flow rate of 250 mL/min. It was found that AIBV has the highest efficiency for toluene removal from sandy soils and can remediate the vadose zone effectively to meet the soil guideline values for protection of groundwater.
生物通风（BV）与土壤气相抽提（SVE）相结合似乎是一种有效的土壤去污组合方法。本文有两个主要目的：评估土壤含水量（SWC）和空气流速对SVE的影响，并研究从砂质土壤中去除甲苯时BV和SVE之间的过渡状态。注气96小时后，在所有五个SVE实验（包括SWC分别为5%、10%和15%以及空气流速分别为250和500 mL/min的实验）中，去除效率均超过97%。在以250 mL/min的恒定流速注气96小时后，通过BV和SVE组合（AIBV：注气生物通风）获得了最高的甲苯去除效率（>99.5%）。研究发现，AIBV从砂质土壤中去除甲苯的效率最高，并且能够有效修复包气带，以满足保护地下水的土壤指导值。
