生态与农村环境学报 ›› 2023, Vol. 39 ›› Issue (5): 576-583.doi: 10.19741/j.issn.1673-4831.2022.1145

• 微/纳塑料分析方法和污染特征 • 上一篇    下一篇

不同类别粪便堆肥中微塑料赋存特征及区域差异

杨杰1,2, 涂晨1,2, 李瑞杰1,2,3, 冯裕栋1,2, 李连祯4, 骆永明1,2   

  1. 1. 中国科学院土壤环境与污染修复重点实验室, 江苏 南京 210008;
    2. 中国科学院大学, 北京 100049;
    3. 中国科学院西北生态环境资源研究院, 甘肃 兰州 730000;
    4. 青岛大学环境科学与工程学院, 山东 青岛 266071
  • 收稿日期:2022-11-01 出版日期:2023-05-25 发布日期:2023-05-24
  • 通讯作者: 骆永明,E-mail:ymluo@issas.ac.cn E-mail:ymluo@issas.ac.cn
  • 作者简介:杨杰(1993-),男,安徽芜湖人,博士生,从事微塑料的土壤-生物系统过程与风险研究。E-mail:jyang@issas.ac.cn
  • 基金资助:
    国家自然科学基金重大项目(41991330);国家自然科学基金面上项目(42177039,41877142)

Occurrence Characteristics and Regional Differences of Microplastics in Different Types of Manure Composts

YANG Jie1,2, TU Chen1,2, LI Rui-jie1,2,3, FENG Yu-dong1,2, LI Lian-zhen4, LUO Yong-ming1,2   

  1. 1. CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    4. College of Environmental Sciences and Engineering, Qingdao University, Qingdao 266071, China
  • Received:2022-11-01 Online:2023-05-25 Published:2023-05-24

摘要: 土壤中微塑料污染问题越来越受到公众关注。施用畜禽粪便堆肥被认为是土壤中微塑料积累的重要途径。但是,对粪便堆肥中微塑料污染程度的了解仍然处于起步阶段。该研究调查了来自中国4个省份的商品化鸡粪、牛粪、羊粪和猪粪堆肥中微塑料的赋存特征。通过筛分和Fenton试剂消解提取粪便堆肥中的微塑料,进一步分析其颜色、粒径、形状、聚合物种类和丰度。结果表明:粪便堆肥中透明、黑色、红色和蓝色微塑料含量较高;粪便堆肥中微塑料形状为纤维、碎片、薄膜和颗粒,以纤维为主;在粒径上以<1 mm的微塑料为主(27.6%~69.5%),粪便堆肥中微塑料的聚合物种类以聚酯(PES)、聚丙烯(PP)和聚乙烯(PE)为主(87.8%~97.0%);微塑料丰度为(2 054.8±493.9)~(9 131.0±600.7)个·kg-1。该研究证实了粪便堆肥是农用地土壤微塑料的重要来源,其对中国农田土壤微塑料的年贡献量可高达1.1×1014个。研究结果为揭示粪便堆肥中微塑料污染特征和区域分布差异以及农田土壤中微塑料的溯源提供了基础数据和科学依据。

关键词: 微塑料, 粪便堆肥, 赋存特征, 丰度

Abstract: Microplastic pollution in the soil has become a growing public concern globally. The application of livestock and poultry manure compost is considered to be an important pathway for the accumulation of microplastics in soils. However, the understanding of microplastic pollution in fecal compost is still limited. In this study, the distribution characteristics of microplastics in composts of commercial chicken, cow, goat, and pig manure in four provinces of China were investigated. Microplastics in manure composts were extracted by sieving and digestion with Fenton's reagent, and their color, size, shape, type, and abundance were further analyzed. The results show that transparent, black, red, and blue are the dominant colors of microplastics in manure composts. The shapes of microplastics in manure composts include fibers, fragments, films and granules, with fibers being the highest. The dominant size of microplastics in manure composts is <1 mm, which accounted for 27.6% to 69.5%; and the dominant polymer types of microplastics in manure composts are polyester (PES), polypropylene (PP), and polyethylene (PE), which accounted for 87.8% to 97.0%. The abundance of microplastics in manure composts ranges from (2 054.8 ± 493.9) to (9 131.0 ± 600.7) items·kg-1. The results of this study confirmed that manure compost is an important source of microplastics in agricultural soil, and the contribution of manure compost application to the abundance of microplastics in agricultural soil of China is estimated to be 1.1 × 1014 items per year. The above results provide basic data and scientific basis for revealing the pollution characteristics and regional differences of microplastics in manure composts, and the source identification of microplastics in agricultural soils.

Key words: microplastics, manure compost, occurrence characteristics, abundance

中图分类号: