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土壤-植物系统中多环芳烃和重金属的行为研究
引用本文:宋玉芳,孙铁珩,张丽珊. 土壤-植物系统中多环芳烃和重金属的行为研究[J]. 应用生态学报, 1995, 0(4)
作者姓名:宋玉芳  孙铁珩  张丽珊
作者单位:中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室
基金项目:中-德生态合作(CERP)研究项目
摘    要:对土壤中多环芳烃和重金属的行为研究表明,与对照相比,0—20cm以上表土层存在多环芳烃和重金属积累,20cm以下土层未发现积累;与春、秋两次采样结果相比,土壤中多环芳烃的含量有所下降,表明土壤微生物对多环芳烃有一定降解作用,且其降解程度与土壤-植物系统的生态结构有关.菲在地下水中检出浓度较高,表明这一污染物有向下迁移的可能性.此外,柳树对土壤中重金属Cd的积累有明显的削减与净化作用.本研究表明,严格限制污水中多环芳烃和重金属的污染负荷以及设计合理的生态结构是避免多环芳烃和重金属在土壤中积累的关键.

关 键 词:污水,土地处理系统,多环芳烃,重金属,土壤,积累与降解

Behaviors of polycyclic aromatic hydrocarbons (PAHs) and heavy metals in soil-plant system
Song Yufang,Sun Tieheng and Zhang Lishan. Behaviors of polycyclic aromatic hydrocarbons (PAHs) and heavy metals in soil-plant system[J]. The journal of applied ecology, 1995, 0(4)
Authors:Song Yufang  Sun Tieheng  Zhang Lishan
Abstract:In order to understand the fate of PAHs and heavy metals in soil-plant system,the behaviors of PAHs and heavy metals in soil of land treartment system (LTS) at western Shenyang were studied. PAHs and heavy metals are accumulated in 0-20cm soil layer, and can not be found below. The PAHs content is decreased from April to October, which shows that soil microbes play an important role in the degradation of PAHs, and the degradation rate is related to ecojogical structure of soil-plant system. Phenanthrene can be determined with a high concentration in the groundwater, which indicates the possibility of its migration downward. Willow can reduce and purify heavy metals. This study shows that strict control of pollutant load of PAHs and heavy metals in wastewater and rational design of ecological structure are the key points for avoiding the accumulation of PAHs and heavy metals in soil.
Keywords:Wastewater  Land treatment system  Polycyclic aromatic hydrocarbons (PAHs)  Heavy metal  Soil  Accumulation and degradation.  
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