Abstract

Greenhouse assessment of the effect of oil on Chromolaena odorata ability to remove PCB from soil treated with transformer oil co-contaminated with Aroclor 1260 was done. Plants were transplanted into one kilogram of soil contained in 1 L pots differently containing 100, 200, and 500 ml of transformer oil (T/O), co-contaminated with 100 ppm of Aroclor. Treatments were done in two microcosms; direct contamination and soil cultured method. Measured plant growth parameters showed that C. odorata growth was affected by the different concentrations of oil. Inhibition of plant growth by oil increased with concentrations. At the end of six weeks, plant growth was affected in T/O amended soil. Plants size was increased by 1.4, 0.46 and −1.0% in direct treatment and 17.01, 6.09 and 1.08% in soil culture at the 100, 200 and 500 ppm respectively. Untreated control showed a 43.07% increase. Slight PCB recovery was observed in root tissues of C. odorata but soil PCB was reduced by 66.6, 53.2, 41.5% and 77.3, 74.7, 58.8% at both treatments in their respective concentrations of oil. However, unplanted control was reduced by 21.4 and 16.7% in the two treatments at 66,000 ppm of oil. This study has shown that with improved agronomic practices, there is a possibility of phytoremediation of soil PCB from PCB contained transformer oil contaminated soil using Chromolaena odorata, hence it should be optimized in the field.

摘要

温室评估了油对Chromolaena odorata从用Aroclor 1260共同污染的变压器油处理过的土壤中去除PCB的能力的影响。将植物移植到装在1 L盆中的1千克土壤中，该盆不同地包含100、200和500 ml的变压器油（T / O），并被100 ppm的Aroclor共同污染。治疗是在两个缩影中进行的。直接污染和土壤培养方法。测得的植物生长参数表明，C。odorata油的浓度不同会影响其生长。油脂对植物生长的抑制作用随浓度的增加而增加。在六周结束时，在T / O改良土壤中植物生长受到影响。在100、200和500 ppm的条件下，直接处理的植物尺寸分别增加了1.4、0.46和-1.0％，在土壤培养中分别增加了17.01、6.09和1.08％。未经处理的对照显示43.07％的增加。在香茅根组织中观察到少量的PCB恢复但两种处理方法在各自的油浓度下，土壤多氯联苯分别减少了66.6、53.2、41.5％和77.3、74.7、58.8％。但是，在两种处理中，当油量为66,000 ppm时，未播种的对照减少了21.4和16.7％。这项研究表明，通过改进农艺方法，有可能利用臭椿（Chromolaena odorata）从含有多氯联苯的变压器油污染土壤中对土壤多氯联苯进行植物修复，因此应在现场进行优化。