丹江口水库不同土地利用类型消落带土壤微塑料赋存特征  

Occurrence Characteristics of Microplastics in the Hydro-fluctuation Belt of Different Land Use Types in Danjiangkou Reservoir

作　　者：杨子薇 潘雄 林莉[2] 陈和春[1] 王继保[1] 吴伟杰 YANG Zi-wei;PAN Xiong;LIN Li;CHEN He-chun;WANG Ji-bao;WU Wei-jie(College of Water Resources and Environment,China Three Gorges University,Yichang 443000,China;Basin Water Environmental Research Department,Changjiang River Scientific Research Institute,Wuhan 430010,China;College of Environment,Hohai University 210098,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443000 [2]长江科学院流域水环境研究所,武汉430010 [3]河海大学环境学院,南京210098

出　　处：《长江科学院院报》2025年第2期54-61,共8页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金青年项目(52200224);中央级公益性科研院所基本科研业务费联合基金项目(CKSF2023643/SH,CKSF2023337/SH)。

摘　　要：目前水库不同土地利用类型消落带土壤中的微塑料赋存特征尚不清楚。通过考察丹江口水库消落带3种不同土地利用类型(裸地、林地和耕地),对土壤中微塑料污染现状进行了调查。结果显示:丹江口水库消落带裸地、林地和耕地土壤中微塑料的平均丰度分别为985±333、798±143、625±175 n/kg,主要聚合物类型为聚乙烯(PE)、聚丙烯(PP)和聚苯乙烯(PS),分别占比44.0%、27.2%和11.1%;其中超过75%的微塑料为纤维状,且大约39.5%的微塑料粒径范围分布在50~500μm之间,为主要的粒径范围;丹江口水库消落带土壤中微塑料颜色以蓝色为主,消落带不同土地利用类型土壤中微塑料丰度存在显著差异性,呈现裸地>林地>耕地的趋势。研究成果对开展水库消落带微塑料污染控制、保障水库水质安全具有重要的科学意义。The pollution characteristics of microplastics in the hydro-fluctuation belt(HFB)of Danjiangkou Reservoir,especially under different land use types,remain inadequately understood.This study aimed to investigate the current contamination levels of microplastics in soil samples from various land use types—open space,forested land,and cropland—within the HFB of Danjiangkou Reservoir.Our findings revealed average microplastic abundances in open space,forested land,and cropland at 985±333 n/kg,798±143 n/kg,and 625±175 n/kg,respectively.The dominant polymer types identified were polyethylene(PE),polypropylene(PP),and polystyrene(PS),accounting for 44.0%,27.2%,and 11.1%of the total microplastics,respectively.Over 75%of the microplastics were fibrous in form,and around 39.5%of the particles exhibited sizes ranging from 50 to 500μm.Blue was the most frequently observed color among the microplastics.Moreover,there were significant variations in microplastic abundances across different land use types in the HFB,with the abundance in open space being the largest,followed by forested land and cropland in descending order.These results offer valuable insights into the occurrence characteristics of microplastics in the HFB under diverse land use scenarios and serve as a reference for future research in this area.

关 键 词：消落带 微塑料赋存特征 土地利用类型 微塑料污染控制 水质安全 丹江口水库 

分 类 号：X13[环境科学与工程—环境科学] X52