摘要
通过采样调查,对株洲霞湾港域9种乡土植物及其根际土壤的重金属含量进行研究,并对比分析植物对Cu、Cd、Pb、Zn的吸收、转运和富集特征。结果表明:该港域土壤中Cd、Pb、Zn的含量均超过国家土壤环境质量三级标准,存在严重的复合污染。采集的9种植物均对污染表现出一定的耐受性,且不同植物对重金属的吸收和转运表现出较大差异性,根据其生物富集系数和转运系数,大致可分为三类。广玉兰、何首乌、珊瑚树和野芋为富集型植物,适合种植于港堤附近的农田边、厂区;小叶女贞为根部囤积型植物,黄独、蓖麻、小构树和薏米为规避型植物,适合种植于荒地等利用价值低的地区。
Sampling survey was conducted to study the concentrations of heavy metals in the rhizosphere soil and the native plants growing and rhizosphere soil at Harbor area in Zhuzhou.The absorption,transportation and accumulation of these plants for Cu,Cd,Pb,Zn were analyzed.The results showed that the soils were highly contaminated by Cd,Pb,Zn as their concentrations surpassed the level 3standard of National.The 9 plants showed tolerance to contamination,and different species made differences in absorption and transportation.According to the factor of bioconcentration factor(BCF)and transmission coefficient(TF),plants were divided into 3kinds.Magnolia grandiflora Linn.,Fallopia multiflora(Thunb.)Harald.,Viburnum odoratissinum Ker.-Gawl.and Colocasia antiquorum Schott were accumulators,which were applied to cultivate in the surroundings of farmland and plant area.Ligustrum quihoui Carr.was root compartments.Broussonetia kazinoki S.et Z.,Dioscorea bulbifera Linn.,Ricinus communis Linn.and Coix chinensis Tod.were excluders which were applied to cultivate in wasteland.
出处
《水土保持学报》
CSCD
北大核心
2013年第4期161-165,共5页
Journal of Soil and Water Conservation
基金
环保公益性行业科研专项"长株潭矿区污染控制与生态修复技术究"(200909066)
"重金属污染耕地农业利用风险控制技术研究"(201009047)
环境科学与工程湖南省重点学科建设基金项目
关键词
乡土植物
根系土壤
重金属
富集
修复
native plants
rhizosphere soil
heavy metal
accumulation
remediation
