高密度城市核心区滨水绿地微塑料分布特征及土地利用对其影响——以成都市锦江生态带为例  

Distribution characteristics of microplastics in waterfront green space and the impact of land-use in high-density urban core area:a case study of jinjiang ecological belt in Chengdu

作　　者：李宸 高梦瑶 杨洁[1,2] LI Chen;GAO Mengyao;YANG Jie(College of Architecture&Environment,Sichuan University,Chengdu 610065,China;Yibin R&D Park of Sichuan University,Yibin 644000,China)

机构地区：[1]四川大学建筑与环境学院,成都610065 [2]四川大学宜宾园区,四川宜宾644000

出　　处：《四川林业科技》2025年第2期21-28,共8页Journal of Sichuan Forestry Science and Technology

摘　　要：微塑料作为一种新型污染物在城市水环境中广泛存在,城市高密度核心区滨水绿地微塑料污染问题值得探讨。选取了成都市锦江生态带范围内10个城市滨水公园为研究对象,通过对其地表水和土壤沉积物中微塑料污染情况的系统调研,探究成都市高密度核心区滨水绿地微塑料分布和特征以及不同城市建设用地类型对微塑料污染的影响,评估微塑料的风险并制定有效的解决措施缓解微塑料污染问题。研究结果表明,地表水样本中的微塑料丰度范围为10.73 items·L^(−2)至28.33 items·L^(−2),土壤沉积物样本中的微塑料丰度范围为587 items·kg^(−2)dry weight至958 items·kg^(−2)dry weight。在水样和沉积物样本中,微塑料的主要形态为颗粒、碎片、纤维和薄膜,微塑料的大小主要分布在50~<500μm范围内。主要的聚合物类型为聚乙烯(PP)、聚丙烯(PE)、聚苯乙烯(PS)和聚对苯二甲酸乙二醇酯(PET)。商业服务业设施用地面积较大的地点往往具有更高的微塑料浓度。从城市规划角度考量,限制高污染潜力的土地用途(如商业服务业设施用地)靠近滨水绿地的分布,有助于缓解城市高密度核心区滨水绿地微塑料污染问题。Microplastics,as a new type of pollutant,are widely present in urban aquatic environment,and the pollution problem of microplastics in waterfront green space within high-density urban core area is worth discussing.Ten urban waterfront parks in Jinjiang Ecological Belt in Chengdu were selected as the research objects.Through the systematic investigation of microplastics pollution in surface water and soil sediments,the study explored the distribution and characteristics of microplastics in the waterfront green space of Chengdu's high-density core area and analyzed the impact of different urban land-use types on microplastics pollution.It also assessed the risk of microplastics and proposed effective solutions to mitigate microplastics pollution.The results showed that the abundance of microplastics in surface water samples ranged from 10.73 items/L to 28.33 items/L,while in soil sediment samples,the abundance ranged from 587 items/kg dry weight to 958 items/kg dry weight.In both water and sediment samples,the main forms of microplastics were particles,fragments,fibers,and films,and the size was predominantly distributed in the range of 50~<500μm.The main polymer types were polypropylene(PP),polyethylene(PE),polystyrene(PS),and polyethylene terephthalate(PET).Sites with large area of commercial and service-oriented facilities tended to have higher microplastics concentration.From the perspective of urban planning,limiting the distribution of land use type with high pollution potential(such as commercial service facilities)near waterfront green space will help alleviate the pollution problem of waterfront green space in microplastics,a high-density urban core area.

关 键 词：微塑料 高密度城市核心区 滨水绿地 土地利用 

分 类 号：X52[环境科学与工程—环境工程]