Agricultural Research Organization, Newe Ya'ar Research Center, POB 1021, Ramat Yishay 30095, Israel.
Agricultural Research Organization, Newe Ya'ar Research Center, POB 1021, Ramat Yishay 30095, Israel; Dept. of Natural Resources and Environmental Management, University of Haifa, Mount Carmel, Haifa 3498838, Israel.
J Environ Manage. 2018 Apr 1;211:247-255. doi: 10.1016/j.jenvman.2018.01.013. Epub 2018 Feb 4.
Soil pollution in Israel, due to diesel contamination, is a major concern, with gas stations, factories and refineries being the main polluters (>60%). Vetiver grass (Vetiveria zizanioides L.) is a perennial grass belonging to the Poaceae family, and is recognized world-wide for its potential as a plant with phytoremediation traits to contaminated soils. It is demonstrated here to decrease diesel contamination in field and court-yard trials. Chemical soil analysis indicated up to a 79% decrease (P < .05) in diesel pollution of contaminated soil planted with Vetiver; and at high soil contamination levels of 10 L/m, a significant (P < .05) reduction of 96, 96 and 87% was recorded at soil depths of 0-20, 20-40 and 40-60 cm, respectively. Furthermore, in field plots contaminated with diesel and planted with Vetiver, weeds' biomass recovered to non-polluted levels following 8 to 9 months of Vetiver treatment. An economic evaluation conducted based on the cost-benefit analysis (CBA) principles, utilizing the Net Present Value (NPV) compared phytoremediation to other currently used decontamination procedures. The economic comparison showed that phytoremediation cleanup costs are lower and more beneficial to society at large, primarily from an ecosystem services perspective. Combining the results of the agronomic examination with the economic valuation, this research pointed out that phytoremediation with Vetiver has a non-negligible potential, making it a good solution for cleansing diesel from soils on a state-wide scale in Israel and worthy of further research and development.
以色列的土壤污染主要是由柴油污染造成的，加油站、工厂和炼油厂是主要的污染源（超过 60%）。香根草（Vetiveria zizanioides L.）是一种多年生禾本科植物，因其具有受污染土壤的植物修复特性而在全球范围内得到认可。本研究证明了它可以减少田间和庭院试验中的柴油污染。化学土壤分析表明，种植香根草的受污染土壤中柴油污染减少了 79%（P <.05）；在 10 L/m 的高土壤污染水平下，分别在 0-20、20-40 和 40-60 cm 的土壤深度处，记录到了 96%、96%和 87%的显著减少（P <.05）。此外，在被柴油污染并种植香根草的田间试验中，经过 8 到 9 个月的香根草处理后，杂草的生物量恢复到未污染的水平。根据成本效益分析（CBA）原则进行的经济评估，利用净现值（NPV）将植物修复与其他当前使用的去污程序进行比较。经济比较表明，植物修复的清理成本更低，对整个社会更有利，主要是从生态系统服务的角度来看。将农业学检查的结果与经济评估相结合，本研究指出，香根草的植物修复具有不可忽视的潜力，使其成为在以色列范围内清除土壤中柴油的一种很好的解决方案，值得进一步研究和开发。
