深圳市清水河垃圾焚烧厂周围地区优势植物的汞污染研究  

Mercury Pollution Investigation in Predominant Plants Surrounding Shenzhen Qingshuihe Municipal Solid Waste Incineration Plant

作　　者：赵宏伟[1] 钟秀萍[1] 刘阳生[1,2] 王俊坚[1] 洪渊 招康赛 曾辉[1,4] 

机构地区：[1]北京大学深圳研究生院城市与环境学院,深圳518055 [2]北京大学环境科学与工程学院,北京100871 [3]深圳市环境监测中心站,深圳518049 [4]北京大学城市与环境学院,北京100871

出　　处：《环境科学》2009年第9期2786-2791,共6页Environmental Science

基　　金：国家自然科学基金项目(40830747);深圳市科技局"双百计划"项目

摘　　要：为研究垃圾焚烧厂对周围植物的汞污染状况,分析了深圳市清水河垃圾焚烧厂周围优势植物茎叶以及土壤的总汞浓度.结果表明,该垃圾焚烧厂周围的优势植物均受到一定程度的汞污染,叶总汞浓度为0.0309～0.2467 mg·kg^-1,平均值为0.0948 mg·kg^-1,所选择的6种优势植物叶总汞的浓度：台湾相思〉豺皮樟〉马占相思〉大叶相思〉木荷〉梅叶冬青;茎总汞浓度为0.0074～0.1196 mg·kg^-1,平均值为0.0417 mg·kg^-1.同种植物茎叶总汞浓度呈显著正相关,而植物茎叶的总汞浓度与土壤总汞浓度并无显著相关性;在该垃圾焚烧厂主导风向的下风向,距污染源的距离和地形差异共同对烟气扩散浓度产生影响,而植物茎叶总汞浓度变化则与烟气扩散浓度的空间分异格局基本吻合.上述结果充分证明,本研究区内烟气-叶的交互作用在植物与环境的汞交换中占据主导地位.In order to investigate the effects of mercury emission from municipal solid waste incineration （MSWI） on the surrounding plants and soils, the mercury concentrations were examined in the plant samples including leaves and stems and the soil samples around Shenzhen Qingshuihe MSWI Plant. Results show that, these plants are significantly polluted by mercury, the mercury concentrations of the plant leaves are 0.030 9-0.246 7 mg·kg^-1 , with the mean value 0.094 8 mg·kg^-1 , among the local prominent plants, the mercury concentrations in the leaves are in the order of： Acacia confuse 〉 Litsea rotundifolia 〉 Acacia mangium 〉 Acacia auriculaeformis 〉 Schima superb 〉 llex asprella. The mercury concentrations of the plant stems are 0.007 4-0. 119 6 mg·kg^-1 , with the mean value 0.041 7 mg·kg^-1 . For the same plant, the mercury concentration in its leaf correlates positively with that in its stem, but presents little correlation with that in the soil where it grows. Under the direction of the dominant wind, the concentration of smoke diffusion is often influenced by the distance from the stack and the difference of ten＇ain. The mercury concentrations of the plant leaves and stems vary almost in accordance with spatial heterogeneity patterns of smoke diffusion. These results demonstrate that the interaction of the smoke and plant leaves play the leading role in the mercury exchange between plants and environment.

关 键 词：汞 垃圾焚烧 植物 累积 

分 类 号：X171.5[环境科学与工程—环境科学]