Sun Lu, Liao Xiaoyong, Yan Xiulan, Zhu Ganghui, Ma Dong
Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences (CAS), 11A, Datun Road Anwai, Beijing, 100101, People's Republic of China.
Environ Sci Pollut Res Int. 2014 Nov;21(21):12494-504. doi: 10.1007/s11356-014-3171-6. Epub 2014 Jun 20.
The heavy metal and polycyclic aromatic hydrocarbons (PAHs) contents were evaluated in surface soil and plant samples of 18 wild species collected from 3 typical industrial sites in South Central China. The accumulative characteristics of the plant species for both heavy metal and PAHs were discussed. The simultaneous accumulation of heavy metal and PAHs in plant and soil was observed at all the investigated sites, although disparities in spatial distributions among sites occurred. Both plant and soil samples were characterized by high accumulation for heavy metal at smelting site, moderate enrichment at coke power and coal mining sites, whereas high level of PAHs (16 priority pollutants according to US Environmental Protection Agency) at coke power site, followed sequentially by coal mining and smelting sites. Based on the differences of heavy metal and PAH accumulation behaviors of the studied plant species, heavy metal and PAH accumulation strategies were suggested: Pteris vittata L. and Pteris cretica L. for As and PAHs, Boehmeria nivea (L.) Gaud for Pb, As, and PAHs, and Miscanthus floridulu (Labnll.) Warb for Cu and PAHs. These native plant species could be proposed as promising materials for heavy metal and PAHs combined pollution remediation.
对采自中国中南部3个典型工业场地的18种野生植物的表层土壤和植物样本中的重金属及多环芳烃(PAHs)含量进行了评估。探讨了这些植物物种对重金属和PAHs的累积特征。尽管各场地之间存在空间分布差异,但在所调查的所有场地均观察到了植物和土壤中重金属与PAHs的同时累积现象。植物和土壤样本的特征为:冶炼场地重金属累积量高,焦化厂和煤矿场地中度富集;而焦化厂场地多环芳烃(美国环境保护局列出的16种优先污染物)含量高,其次是煤矿和冶炼场地。基于所研究植物物种对重金属和PAHs累积行为的差异,提出了重金属和PAHs的累积策略:蜈蚣草和克里特岛凤尾蕨用于修复砷和PAHs,苎麻用于修复铅、砷和PAHs,五节芒用于修复铜和PAHs。这些本地植物物种有望成为重金属和PAHs复合污染修复的材料。