17种道路绿化树木叶片重金属镉和铬含量的比较研究  

Comparison of heavy metal contents in their leaves by 17 road afforestation trees

作　　者：刘冰[1,2] 

机构地区：[1]新乡学院化学与化工学院,河南新乡453000 [2]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《西北师范大学学报（自然科学版）》2014年第6期104-109,共6页Journal of Northwest Normal University(Natural Science)

基　　金：国家科技支撑计划项目(2009BADB2B0601);国家自然科学基金资助项目(31270741)

摘　　要：对新乡市17种道路绿化树木叶片重金属镉和铬的含量进行了分析,结果表明,同种道路绿化树木叶片的重金属含量表现为污染区>清洁区,秋季>春季,铬元素>镉元素;不同种道路绿化树木叶片的重金属含量具有明显差异,镉含量由大到小顺序为银白杨、五角枫、毛白杨、小叶女贞、大叶女贞、紫叶李、大叶黄杨、栾树、悬铃木、臭椿、构树、白蜡、国槐、红叶石楠、海桐、凤尾兰、小叶黄杨,铬含量由大到小顺序为五角枫、毛白杨、银白杨、紫叶李、小叶黄杨、红叶石楠、悬铃木、国槐、凤尾兰、构树、小叶女贞、海桐、栾树、大叶女贞、臭椿、白蜡、大叶黄杨;根据17种道路绿化树木叶片重金属镉和铬的含量进行归类,毛白杨和五角枫为第一类,紫叶李、悬铃木、银白杨、小叶黄杨和红叶石楠为第二类,白蜡、国槐、构树、臭椿、栾树、海桐、凤尾兰、大叶黄杨、大叶女贞和小叶女贞为第三类.道路绿化树木叶片重金属含量依功能区、季节、重金属污染元素和树种的不同具有明显的差异.The urban road green trees could absorb heavy metal pollutants in the atmosphere.The heavy metals Cd and Cr contents in leaves of 17 virescence trees in Xinxiang City are analysed.The results indicate that the same road afforestation trees show different heavy metal contents in their leaves,polluted area 〉 clear area, Autumn 〉 Spring, Cd 〉 Cr; simultaneously different species show quite different contents to the same heavy metal element,the content of Cd is in the order of Populus alba 〉Acer mono 〉Populus tomentosa 〉 Ligustrum quihoui Carr 〉 Ligustrum lucidum 〉 Prunus ceraifera 〉 Euonymus j aponicus 〉 Koelreuteria paniculata 〉 P latanus acerifolia 〉 Ailanthus altissima 〉 Broussonetia papyrifera 〉 Fraxinus chinensis 〉 Sophora j aponica 〉 Photinia frasery 〉 Pittosporum tobira 〉Yucca gloriosa 〉Buxus microphylla;the content of Cr is in the order of Acer mono 〉 Populus tomentosa 〉Populus alba 〉 Prunus ceraifera 〉 Buxus microphylla 〉 Photinia frasery 〉 P latanus acerifolia 〉Sophora j aponica 〉Yucca gloriosa 〉Broussonetia papyrifera 〉Ligustrum quihoui Carr 〉Pittosporum tobira 〉Koelreuteria paniculata 〉Ligustrum lucidum 〉Ailanthus altissima 〉Fraxinus chinensis 〉Buxus megistophylla .The afforest trees are classified three at the basis of the content of Cd and Cr,the first category includes Populus tomentosa and Acer mono ;Prunus ceraiferai ,P latanus acerifolia ,Populus alba ,Buxus microphylla and Photinia frasery belong to the second category;the third category includes Fraxinus chinensis ,Sophora j aponica ,Broussonetia papyrifera ,Ailanthus altissima ,Koelreuteria paniculata , Pittosporum tobira ,Yucca gloriosa , Euonymus j aponicus , Ligustrum lucidum and Ligustrum quihoui Carr . Heavy metal contents in road green trees leaves show markedly difference depending on function areas,seasons,heavy metal kinds and tree species.

关 键 词：道路 绿化树木 重金属 

分 类 号：S718[农业科学—林学]