Scholarlink

<p>This study developed a mass-based quantification approach combined with a modified flotation-sieving method to determine microplastics (MPs) of low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polypropylene (PP) in soils. MPs extraction was improved at three levels: (1) the standard procedure to collect floating MPs from the surface of the soil suspension, (2) a optimized procedure to collect suspended MPs from the top 10&#xa0;cm of the soil suspension, and (3) determination of the measurable MPs limits. Three particle-size ranges (0.053–0.149&#xa0;mm, 0.149–2&#xa0;mm, and 2–5&#xa0;mm) and three farmland soils were used to prepare MPs-spiked samples. Results showed that for 1% MPs-spiked soil of LDPE, HDPE, and PP with particle sizes larger than 0.15&#xa0;mm, the standard extraction achieved recoveries exceeding 90%. For particle sizes of 0.053–0.149&#xa0;mm, the standard extraction yielded recoveries below 60%. Using the optimized extraction, recoveries of small particles (0.053–0.149&#xa0;mm) increased to over 80% for HDPE and PP but not for LDPE. This indicates that the measurable limits for the former two but not for the latter could approach 1% in soil. Further testing for LDPE in soils spiked with 2%, 5%, and 10% MPs showed recoveries of small particles above 80%, indicating a measurable limit of approximately 2%.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Improvement of flotation-sieving method for extracting soil microplastics and delineating measurable particle-size fractions

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月20日

查看全文
  • Yi-Jie Liao,
  • Zi-Yi Chen,
  • Bo-Ching Chen,
  • Kai-Wei Juang

摘要

This study developed a mass-based quantification approach combined with a modified flotation-sieving method to determine microplastics (MPs) of low-density polyethylene (LDPE), high-density polyethylene (HDPE), and polypropylene (PP) in soils. MPs extraction was improved at three levels: (1) the standard procedure to collect floating MPs from the surface of the soil suspension, (2) a optimized procedure to collect suspended MPs from the top 10 cm of the soil suspension, and (3) determination of the measurable MPs limits. Three particle-size ranges (0.053–0.149 mm, 0.149–2 mm, and 2–5 mm) and three farmland soils were used to prepare MPs-spiked samples. Results showed that for 1% MPs-spiked soil of LDPE, HDPE, and PP with particle sizes larger than 0.15 mm, the standard extraction achieved recoveries exceeding 90%. For particle sizes of 0.053–0.149 mm, the standard extraction yielded recoveries below 60%. Using the optimized extraction, recoveries of small particles (0.053–0.149 mm) increased to over 80% for HDPE and PP but not for LDPE. This indicates that the measurable limits for the former two but not for the latter could approach 1% in soil. Further testing for LDPE in soils spiked with 2%, 5%, and 10% MPs showed recoveries of small particles above 80%, indicating a measurable limit of approximately 2%.