Detecting Microplastics in Soil and Sediment in an Undergraduate Environmental Chemistry Laboratory Experiment That Promotes Skill Building and Encourages Environmental Awareness

Detecting Microplastics in Soil and Sediment in an Undergraduate Environmental Chemistry Laboratory Experiment That Promotes Skill Building and Encourages Environmental Awareness
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在本科生环境化学实验室实验中检测土壤和沉积物中的微塑料,促进技能培养并鼓励环境意识

DOI:
10.1021/acs.jchemed.8b00392
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发表时间:
2019
影响因子:
3
通讯作者:
Peller, Julie
Peller, Julie
中科院分区:
化学2区
文献类型:
--
作者:
Rowe, Laura;Kubalewski, Maria;Clark, Robert;Statza, Emily;Goyne, Thomas;Leach, Katie;Peller, Julie

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环境污染既是一个全球性的问题,也是一个地方性的问题,特别是微塑料污染由于其普遍存在和影响食物链的生物累积潜力而受到越来越多的关注。该实验室实验使用当前的研究方法,使学生能够确定当地土壤样品中微塑料污染的程度。这个实验室实验可以作为一个2或3周的迷你研究项目,为一年级的本科生,无论是介绍化学课程的非专业或一般化学课程的专业。实验室实验让学生暴露于筛选,密度梯度,并暴露于芬顿试剂,以分离微塑料从土壤样品,然后分析和定量立体显微镜放大。几个常见的一般化学主题大多数一年级化学课程(密度和溶液浓度计算等)在实验室实验中强调。从实验后评估,学生在选择技能和微塑料污染问题的知识方面表现出显着的进步,一些学生在完成实验室实验后认识到他们对研究的误解。
Environmental pollution is both a worldwide and a local issue, and microplastic pollution in particular is receiving increased attention due to its prevalence and bioaccumulation potential affecting the food chain. This laboratory experiment uses current, research-based methods such that the students can determine the extent of microplastic pollution in local soil samples. This laboratory experiment can be used as either a 2 or 3 week mini-research-project for first-year undergraduate students in either an introductory chemistry course for nonmajors or a general chemistry course for majors. The laboratory experiment gives students exposure to sieving, density gradients, and exposure to the Fenton reagent to isolate microplastics from soil samples, which are then analyzed and quantified under stereomicroscope magnification. Several general chemistry topics common to most first-year chemistry courses (density and solution concentration calculations, etc.) are emphasized during the laboratory experiment. From postexperiment assessments, students showed a marked improvement in select skill sets and knowledge of the microplastic pollution problem, and some students recognized their misconceptions concerning research following the completion of this laboratory experiment.
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