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Detecting Microplastics in Soil and Sediment in an Undergraduate Environmental Chemistry Laboratory Experiment That Promotes Skill Building and Encourages Environmental Awareness
Journal of Chemical Education ( IF 3 ) Pub Date : 2018-09-24 00:00:00 , DOI: 10.1021/acs.jchemed.8b00392
Laura Rowe 1 , Maria Kubalewski 1 , Robert Clark 1 , Emily Statza 1 , Thomas Goyne 1 , Katie Leach 1 , Julie Peller 1
Affiliation  

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.

中文翻译:

在本科环境化学实验室实验中检测土壤和沉积物中的微量塑料,以促进技能建设并鼓励环境意识

环境污染既是世界范围的问题,也是地方性问题,尤其是微塑性污染由于其普遍性和生物蓄积性影响着食物链而受到越来越多的关注。该实验室实验使用当前的,基于研究的方法,以便学生可以确定当地土壤样品中微塑性污染的程度。该实验室实验可以作为为期一年的本科生进行为期2或3周的小型研究项目,用于非专业的基础化学入门课程或专业的常规化学课程。实验室实验使学生暴露于筛分,密度梯度,并暴露于Fenton试剂,以从土壤样品中分离出微量塑料,然后在立体显微镜放大下对其进行分析和定量。在实验室实验期间,将重点介绍大多数第一学年化学课程共有的几个通用化学主题(密度和溶液浓度计算等)。通过实验后评估,学生在选择技能和对微塑料污染问题的了解方面显示出明显的进步,并且在完成此实验室实验后,一些学生意识到了他们对研究的误解。
更新日期:2018-09-24
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