杭州湾沿岸城市区域香樟行道树重金属累积特征及来源

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中图分类号：S792.23 文献标识码：A doi：10.13601/j.issn.1005—5215.2025.04.001

Accumulation Characteristics and Sources of Heavy Metals in Cinnamomum camphora Street Trees Along the Hangzhou Bay Coastal Urban Area

Li Rongxi1，2，3

（1.Shanghai Academy of Landscape Architecture and Planning，Shanghai 2Oo232，China; 2. Shanghai Enginering Research Center for Greening Technologyof Challenging Urban Sites，Shanghai 200232，China; 3.Key Laboratory of National Forestry and Grassland Administration on Ecological Landscaping of ChallengingUrban Sites，Shanghai 2Oo232，China）

Abstract To investigate the accumulation characteristics and main pollution sources of heavy metals in Cimmamomum camphora （the primary stret tree in theHangzhou Baycoastalurban area），124 sampling sites weresetupin1l districts/ countiesoffivecities（ShanghaiJiaxing，Hangzhou，ShaoxingandNingbo）．Atotalof248plantleafandrootsamples were collected to detect and analyze the mass fraction five heavy metals：cadmium （Cd），chromium （ ∣Cr⟩ ，nickel （Ni），mercury （ Hg ，and arsenic（As）.The functionalareas wherethesampling sites were located included industrial zones，residentialareas，and road traffic areas.The results showedas the following four aspects.1）The mass fractionof heavy metals in leaves and rootsof Cimamomumcamphora in industrial zones was generally higher than those in residential areasandroad traffic areas，especiallforelements suchas Cr，Ni，andAs，mainlyderived fromfosilfuelcombustionand industrialemissons.2） Heavy metalpolltion in residentialareas primarilyoriginated from fosil fuel combustionand domestic polutionsources， such as waste incineration.3）Heavy metal polution inroad trafic areas was mainly associated with motor vehicle exhaust emissions，brake pad wear，anddiesel combustion.4）Diferencesexisted in theenrichment sequences of heavy metals between plant rootsand leaves：root enrichment was more dependent on the plant’sownabsorption characteristics，while leaf enrichment was mainly influenced by atmospheric particulate matter deposition.

收稿日期：2025—02—21

基金项目：国家重点研发计划项目“城市蓝绿空间宜居需求与生态服务供给耦合评价及管控平台构建”（2022YFC3802601）；上海市财政专项“上海典型绿地土壤质量监测保障体系"（ZX一07）；上海市财政专项“上海市林地土壤质量监测体系"（ZX-08）。（剩余10049字）