Membrane-Biochar Strip for Phenolic Adsorption
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Solution Overview
Problem
Existing water sampling technologies face challenges in achieving efficient and cost-effective adsorption of contaminants, particularly phenolic compounds, due to the high cost and complexity of current adsorbents like C18 disks and carbon nanotube sorbents, which also pose toxicity concerns.
Innovation Solution
A membrane-biochar strip is developed using seagrass biochar (SGBC) particles sandwiched between porous polymeric membrane sheets, allowing for efficient adsorption and extraction of phenolic compounds from aqueous solutions, utilizing the cost-effectiveness and low-temperature production of biochar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If C18 disks and carbon nanotube sorbents are used as adsorbents, then adsorption efficiency is improved, but cost and complexity increase
Solution Approach 1:
The patent uses disposable polymeric membrane sheets as adsorbents instead of expensive, complex materials like C18 disks and carbon nanotube sorbents. These membranes are designed to be single-use, cost-effective alternatives that maintain adequate adsorption efficiency for water sampling applications while eliminating the need for complex synthesis and handling procedures.
Solution Approach 2:
The patent changes the physical and chemical parameters of the adsorbent by using polymeric membranes with specific pore sizes (e.g., 0.45 μm or 0.22 μm) and hydrophobic properties. This parameter optimization allows the membranes to effectively adsorb phenolic compounds while remaining simple and cost-effective materials, resolving the contradiction between efficiency and complexity.
2Reliability
If C18 disks and carbon nanotube sorbents are used as adsorbents, then adsorption efficiency is improved, but cost increases
Solution Approach 1:
The patent replaces expensive adsorbent materials with inexpensive polymeric membrane sheets that can be manufactured through simple processes. These disposable membranes eliminate the high costs associated with synthesizing and processing C18 disks and carbon nanotube sorbents, while still providing sufficient adsorption performance for environmental monitoring applications.
3Productivity
If active sampling process is used, then sampling rate and pollutant capture quantity are improved, but energy consumption increases
Solution Approach 1:
The patent employs passive sampling where the polymeric membrane adsorbent automatically captures phenolic compounds from water through diffusion and adsorption processes without requiring external energy input. The system serves itself by utilizing the natural concentration gradient and the hydrophobic properties of the membrane to achieve effective sampling, eliminating the need for pumps or power sources while maintaining practical sampling rates.
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
The membrane-biochar strip effectively adsorbs phenolic compounds with sampling rates ranging from 0.005 to 0.045 L/day per 100 mg of SGBC, achieving accurate determination of contaminants with a time-weighted average concentration close to spiked levels, demonstrating a promising low-cost and efficient water sampling method.
Implementation Method 1
seagrass biochar (SGBC) particles are disposed between two porous polymeric membrane sheets resulting in a sandwich structure... effectively adsorbs phenolic compounds
Data Source
AI summary
A membrane-biochar strip for water sampling includes two porous polymeric membrane sheets having the same dimension. The two porous polymeric membrane sheets have an average pore size of about 50 to 150 micrometers (μm). Seagrass biochar (SGBC) particles are disposed between two porous polymeric membrane sheets resulting in a sandwich structure. An edge of the sandwich structure is sealed, and the SGBC particles are encapsulated in the membrane-biochar strip. The SGBC particles have an average particle size of about 150 to 400 μm. The seagrass biochar (SGBC) particles are prepared from Halodule Uninervis seagrass.