Pineapple Peel Waste Valorized for Antimicrobial and Anticancer Nanoparticles

Why It Matters

This research demonstrates a practical approach to waste valorization, transforming a readily available food byproduct into a high-value material. For designers, it highlights opportunities to integrate circular economy principles into product development, reducing environmental impact while creating functional components.

Key Finding

Pineapple peel extract can be used to create silver nanoparticles that are effective against diabetes, show promise in killing cancer cells, and have moderate antibacterial and antioxidant properties.

Key Findings

• Silver nanoparticles (AgNPs) were successfully synthesized using pineapple peel extract.
• The synthesized AgNPs exhibited high antidiabetic potential at low concentrations.
• AgNPs showed dose-dependent cytotoxic activity against HepG2 cancer cells.
• Moderate antibacterial activity was observed against tested foodborne pathogenic bacteria.
• The nanoparticles also displayed potential antioxidant activity.

Research Evidence

Aim: To investigate the potential of silver nanoparticles synthesized using pineapple peel extract for biomedical applications, including antioxidant, antibacterial, antidiabetic, and cytotoxic activities.

Method: Experimental synthesis and characterization of nanoparticles, followed by in vitro biological assays.

Procedure: Silver nanoparticles (AgNPs) were synthesized using an extract from the outer peel of Ananas comosus. The synthesized AgNPs were characterized using UV-visible spectroscopy, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The biological potential of these AgNPs was then evaluated through assays for antioxidant activity, antidiabetic activity, cytotoxicity against HepG2 cells, and antibacterial activity against four foodborne pathogens.

Context: Biomedical materials synthesis, waste valorization, green nanotechnology.

Design Principle

Valorize waste streams by transforming them into functional materials with desirable properties.

How to Apply

Consider using fruit peels, vegetable scraps, or other organic waste as starting materials for synthesizing nanoparticles or composite materials for applications in healthcare, packaging, or textiles.

Limitations

In vitro testing; further in vivo studies are required to confirm efficacy and safety. The specific functional groups responsible for stabilization and reduction were identified but their precise roles require further investigation.

Student Guide (IB Design Technology)

Simple Explanation: You can turn pineapple skins into tiny silver particles that can help fight bacteria and diseases like cancer and diabetes, and they also act as antioxidants.

Why This Matters: This shows how designers can be environmentally responsible by using waste materials to create useful products, which is important for sustainable design.

Critical Thinking: How might the variability in pineapple peel composition affect the consistency and efficacy of the synthesized nanoparticles?

IA-Ready Paragraph: This research highlights the potential of utilizing food waste, specifically pineapple peels, for the green synthesis of silver nanoparticles (AgNPs). The resulting AgNPs demonstrated significant antidiabetic, cytotoxic (against cancer cells), antioxidant, and moderate antibacterial properties, offering a sustainable and cost-effective approach to creating advanced materials for biomedical applications.

Project Tips

• When choosing materials, think about waste products that could be repurposed.
• Investigate the chemical properties of waste materials to understand their potential for synthesis.
• Consider the environmental impact and cost-effectiveness of your material choices.

How to Use in IA

• Reference this study when discussing the use of waste materials in your design project, especially if you are exploring sustainable material sourcing or biomedical applications.

Examiner Tips

• Demonstrate an understanding of how waste materials can be transformed into functional components, linking material science to environmental sustainability.

Independent Variable: Pineapple peel extract (as a reducing and stabilizing agent).

Dependent Variable: Antioxidant activity, antibacterial activity, antidiabetic activity, cytotoxicity of synthesized silver nanoparticles.

Controlled Variables: Concentration of silver ions, reaction time, temperature, pH (potentially).

Strengths

• Utilizes a waste material, promoting sustainability.
• Demonstrates multiple beneficial biological activities of the synthesized nanoparticles.
• Employs standard characterization techniques for nanoparticles.

Critical Questions

• What are the specific bioactive compounds in pineapple peel responsible for the reduction and stabilization of silver ions?
• Are there any potential toxicity concerns associated with these AgNPs in biological systems beyond the tested cancer cell line?

Extended Essay Application

• A potential area for extended research could involve optimizing the synthesis parameters to enhance specific properties of the AgNPs, or exploring their application in a specific product, such as an antimicrobial wound dressing or a biodegradable medical implant coating.

Source

Investigation of antioxidant, antibacterial, antidiabetic, and cytotoxicity potential of silver nanoparticles synthesized using the outer peel extract of Ananas comosus (L.) · PLoS ONE · 2019 · 10.1371/journal.pone.0220950