Potential Artifacts and Control Experiments in Toxicity Tests of Nanoplastic and Microplastic Particles

Area of Science:

• Environmental Science
• Toxicology
• Materials Science

Background:

• Accurate measurement of nanoplastics and microplastics (NMPs) is crucial for understanding their ecological and human health risks.
• Toxicity testing of NMPs faces challenges from measurement artifacts and biases, similar to engineered nanomaterials.
• Contaminants like antimicrobials and surfactants in NMP dispersions can cause toxicity, confounding results.

Purpose of the Study:

• To comprehensively review potential measurement artifacts and biases in NMP toxicity experiments.
• To propose a next generation of control experiments for identifying and mitigating these artifacts.
• To improve the accuracy of NMP risk assessments for both human and ecological health.

Main Methods:

• Review of existing literature on NMP toxicity testing methodologies.
• Identification of common artifacts and biases in NMP exposure studies.
• Proposal of specific control experiments applicable to various NMP toxicity assays.

Main Results:

• Commercial NMP dispersions may contain toxic additives, leading to false positive toxicity findings.
• A range of artifacts can skew results in in vitro, in vivo, and ecotoxicity studies.
• Implementing proposed control experiments can significantly reduce false positives and negatives.

Conclusions:

• Rigorous control experiments are essential for accurate NMP toxicity assessment.
• Revised protocols incorporating these controls will enhance the reliability of NMP risk evaluations.
• This work aims to facilitate more precise understanding of NMP impacts on ecosystems and human health.