AECOM, Sunrise, FL, USA.
Chemosphere. 2012 Oct;89(6):665-71. doi: 10.1016/j.chemosphere.2012.06.006. Epub 2012 Jul 12.
Batch and column experiments were conducted with eucalyptus mulch and commercial compost to evaluate suitability of highly organic natural media to support anaerobic decomposition of trichloroethylene (TCE) in groundwater. Experimental data for TCE and its dechlorination byproducts were analyzed with Hydrus-1D model to estimate the partitioning and kinetic parameters for the sequential dechlorination reactions during TCE decomposition. The highly organic natural media allowed development of a bioactive zone capable of decomposing TCE under anaerobic conditions. The first order TCE biodecomposition reaction rates were 0.23 and 1.2d(-1) in eucalyptus mulch and compost media, respectively. The retardation factors in the eucalyptus mulch and compost columns for TCE were 35 and 301, respectively. The results showed that natural organic soil amendments can effectively support the anaerobic bioactive zone for remediation of TCE contaminated groundwater. The natural organic media are effective environmentally sustainable materials for use in permeable reactive barriers.
采用桉树覆盖物和商业堆肥进行批次和柱实验，以评估高度有机的天然介质是否适合支持地下水三氯乙烯（TCE）的厌氧分解。使用 Hydrus-1D 模型分析 TCE 及其脱氯副产物的实验数据，以估算 TCE 分解过程中连续脱氯反应的分配和动力学参数。高度有机的天然介质允许开发一个能够在厌氧条件下分解 TCE 的生物活性区。桉树覆盖物和堆肥介质中 TCE 的一级生物分解反应速率分别为 0.23 和 1.2d(-1)。桉树覆盖物和堆肥柱中 TCE 的迟滞因子分别为 35 和 301。结果表明，天然有机土壤改良剂可以有效地支持用于修复 TCE 污染地下水的厌氧生物活性区。天然有机介质是用于可渗透反应屏障的有效环境可持续材料。
