Fungal Mycelium Functionalized with Metal-Binding Peptides
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Solution Overview
Problem
Current methods for recycling electronic waste and recovering metals from aqueous solutions are energy-intensive, inefficient, and lack specificity, leading to environmental and health issues due to high labor costs and inadequate recycling practices, particularly in developing countries.
Innovation Solution
A biological approach using peptides and proteins, specifically fusion peptides with metal-binding and chitin-binding domains, is employed to selectively capture and remove target metals from aqueous solutions, utilizing a cost-effective, scalable, and biodegradable filtration system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional extraction methods are used for metal recovery from e-waste, then metal extraction can be achieved, but the process becomes energy-intensive and inefficient
Solution Approach 1:
The patent replaces conventional mechanical and chemical extraction methods with a biological approach using engineered peptides and proteins that selectively bind to target metals. This biochemical substitution enables metal recovery at ambient temperatures without energy-intensive processes, directly resolving the contradiction between extraction efficiency and energy consumption
Solution Approach 2:
The invention changes the operating parameters from high-energy conventional extraction to ambient temperature biological extraction. By using peptides with specific binding affinities for target metals, the system achieves efficient metal recovery under mild conditions, eliminating the need for high energy input while maintaining high productivity
2Quantity of substance
If microbial surface adsorption is used for metal recovery, then metal sequestration is achieved, but specificity is limited as surface functional groups bind many cations with high affinity
Solution Approach 1:
The patent applies local quality by engineering specific peptide sequences with tailored amino acid compositions that create localized binding sites with high specificity for target metals. Unlike generic microbial surfaces that bind multiple cations, these customized peptides exhibit selective affinity for particular metal ions through precise local chemical environments, achieving both high capacity and high specificity
Solution Approach 2:
The engineered peptides act as intermediaries between the solid support and target metals. These peptide mediators provide selective binding interfaces that distinguish between different metal cations, enabling specific metal recovery while the solid support provides the necessary binding capacity. This intermediary approach resolves the contradiction between quantity and precision
3Productivity
If strong acid treatments are used for metal recovery in developing countries, then metal extraction is achieved, but worker safety and environmental impact are severely compromised
Solution Approach 1:
The patent employs inexpensive, biodegradable solid supports functionalized with peptide sequences that can be easily deployed and discarded after use. These disposable biosorbents eliminate the need for hazardous acid treatments while maintaining metal recovery capability, resolving the contradiction between productivity and harmful factors by providing a safe, low-cost alternative suitable for resource-limited settings
Solution Approach 2:
The invention converts the previously harmful acid treatment process into a beneficial biological extraction method. By using engineered peptides that naturally bind metals under mild conditions, the system eliminates toxic chemicals while achieving effective metal recovery, transforming a harmful practice into a safe and sustainable process
4Object-generated harmful factors
If biodegradable and cost-effective filtration materials are used, then environmental sustainability is improved, but filtering efficiency and target metal capture capability may be reduced
Solution Approach 1:
The patent creates composite materials by functionalizing biodegradable solid supports with engineered peptide sequences. This composite approach combines the environmental benefits of biodegradable materials with the high metal capture efficiency of specifically designed peptides, resolving the contradiction between sustainability and productivity by integrating both advantages into a single system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables efficient and specific recovery of metals, reducing their concentration in solutions to undetectable levels, making it suitable for use in resource-limited environments and providing a sustainable alternative for metal recycling.
Implementation Method 1
a peptide configured to selectively bind to the target substance or material and to bind to the substrate
Data Source
AI summary
Method of removing or adsorbing a target substance or material, for example a metal, non-metal toxin, dye, or small molecule drug), from solution by functionalizing a substrate with a peptide configured to selectively bind to the target substance or material and to bind to the substrate. Methods herein are useful for example for biomining applications. More specifically, the method employs metal-binding peptides to remove metals from solution, particularly aqueous solution. More specifically, the substrate is fungal mycelium. Fusion peptides and/or proteins containing metal-binding domain sequence and optionally containing substrate-binding domain sequence are provided. Fusion peptides/proteins containing a metal-binding domain and a chitin-binding domain are provided. Also provided are nucleic acids encoding fusion peptides and/or proteins containing metal-binding domain sequence and those further containing a substrate-binding domain, for example a carbohydrate-binding domain, and more specifically a chitin-binding domain.