首页> 外文期刊>Journal of Contaminant Hydrology >Field assessment of guar gum stabilized microscale zerovalent iron particles for in-situ remediation of 1,1,1-trichloroethane
【24h】

Field assessment of guar gum stabilized microscale zerovalent iron particles for in-situ remediation of 1,1,1-trichloroethane

机译:瓜尔胶稳定的微米级零价铁颗粒原位修复1,1,1-三氯乙烷的现场评估

获取原文
获取原文并翻译 | 示例
       

摘要

A pilot injection test with guar gum stabilized microscale zerovalent iron (mZVI) particles was performed at test site V (Belgium) where different chlorinated aliphatic hydrocarbons (CAHs) were present as pollutants in the subsurface. One hundred kilograms of 56 μm-diameter mZVI (~70 g L~(-1)) was suspended in 1.5 m~3 of guar gum (~7 g L~(-1)) solution and injected into the test area. In order to deliver the guar gum stabilized mZVI slurry, one direct push bottom-up injection (Geoprobe) was performed with injections at 5 depths between 10.5 and 8.5 m bgs. The direct push technique was preferred above others (e.g. injection at low flow rate via screened wells) because of the limited hydraulic conductivity of the aquifer, and to the large size of the mZVI particles. A final heterogeneous distribution of the mZVI in the porous medium was observed explicable by preferential flow paths created during the high pressure injection. The maximum observed delivery distance was 2.5 m. A significant decrease in 1,1,1 -TCA concentrations was observed in close vicinity of spots where the highest concentration of mZVI was observed. Carbon stable isotope analysis (CSIA) yielded information on the success of the abiotic degradation of 1,1,1 -TCA and indicated a heterogeneous spatio-temporal pattern of degradation. Finally, the obtained results show that mZVI slurries stabilized by guar gum can be prepared at pilot scale and directly injected into low permeable aquifers, indicating a significant removal of 1,1,1-TCA.
机译:在瓜皮胶稳定的微米级零价铁(mZVI)颗粒进行的中试注射试验是在试验场所V(比利时)进行的,该试验场所的次氯酸盐中有不同的氯化脂肪烃(CAH)作为污染物存在。将100千克直径为56μm的mZVI(〜70 g L〜(-1))悬浮在1.5 m〜3的瓜尔胶(〜7 g L〜(-1))溶液中,并注入测试区域。为了输送瓜尔豆胶稳定的mZVI浆液,在10.5至8.5 m bgs之间的5个深度进行了一次直接自下而上的向上注射(Geoprobe)。由于含水层的水力传导性有限且mZVI颗粒尺寸较大,因此直接推压技术比其他方法更可取(例如,通过筛选井以低流速注入)。观察到多孔介质中mZVI的最终异质分布可以通过高压注入过程中产生的优先流动路径来解释。观察到的最大传送距离为2.5 m。在观察到最高mZVI浓度的点附近,观察到1,1,1-TCA浓度显着下降。碳稳定同位素分析(CSIA)获得了有关1,1,1-TCA的非生物降解成功的信息,并表明了降解的时空分布模式不均。最后,获得的结果表明,可以以中试规模制备由瓜尔胶稳定的mZVI浆液,并将其直接注入低渗透性含水层中,这表明1,1,1-TCA的显着去除。

著录项

  • 来源
    《Journal of Contaminant Hydrology》 |2014年第8期|88-99|共12页
  • 作者单位

    VITO, Boeretang 200, 2400 Mol, Belgium,University of Antwerp, Department of Bio-Engineering, Groenenborgerlaan 171, 2020 Antwerp, Belgium,Department of Environmental Geosciences, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria;

    Dipartimento di Ingegneria dell'Ambiente, del Territorio e delle Infrastrutture - Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    VITO, Boeretang 200, 2400 Mol, Belgium;

    Dipartimento di Ingegneria dell'Ambiente, del Territorio e delle Infrastrutture - Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    Dipartimento di Ingegneria dell'Ambiente, del Territorio e delle Infrastrutture - Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    VEGAS, University of Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany,Department of Civil and Environmental Engineering, Western University, 1151 Richmond Street, London, ON, N6A 5B9 Canada;

    VEGAS, University of Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany;

    SAPION, Oude Bevelsesteenweg 51,2560 Nijlen, Belgium;

    ISODETECT, Ingolstaedter Landstrasse, 1, D85764 Muenchen, Germany;

    Hoeganaes AB, Bruksgatan 35, SE-263 83 Hoeganas, Sweden;

    VEGAS, University of Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany;

    Dipartimento di Ingegneria dell'Ambiente, del Territorio e delle Infrastrutture - Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    VITO, Boeretang 200, 2400 Mol, Belgium;

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

    Guar gum; mZVI; 1,1,1-TCA; In-situ remediation; Direct push; CSIA;

    机译:瓜尔胶mZVI;1,1,1-TCA;原位修复;直接推送;美国汽车工业协会;
  • 入库时间 2022-08-17 13:40:00

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号