Olive Stone Polyethylene Composite Adsorbent Flakes
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Solution Overview
Problem
Conventional methods for removing organic dyes and other pollutants from wastewater are inefficient due to high water solubility and require filtration systems, making them costly and environmentally unfriendly.
Innovation Solution
A method for preparing porous activated carbon composite flakes using olive stones and polyethylene waste, involving alkali-activation, pyrolysis, acid-activation, and annealing, which creates adsorbent flakes with a high surface area for effective pollutant removal without the need for filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional activated carbon powder is used for dye removal, then adsorption capacity is achieved, but filtration membrane and technique are required for separation
Solution Approach 1:
The patent combines activated carbon particles with a thermoplastic polymer matrix to create a composite adsorbent. This composite structure integrates the high adsorption capacity of activated carbon with the mechanical strength and filterability of the polymer, eliminating the need for separate filtration membranes while maintaining effective dye removal capability
Solution Approach 2:
The thermoplastic polymer forms a matrix that encapsulates the activated carbon particles, creating a self-contained adsorbent structure. This polymer matrix acts as an inherent filtering medium that allows easy separation from wastewater through simple filtration or settling, replacing complex filtration membrane systems
2Reliability
If activated carbon is used for pollutant removal, then adsorption effectiveness is improved, but cost and environmental impact increase due to filtration requirements
Solution Approach 1:
The composite adsorbent is designed to be self-contained, with the polymer matrix providing both structural integrity and filtration capability. The material can be directly applied to wastewater, performs adsorption, and can be easily removed without requiring complex filtration infrastructure, reducing both manufacturing cost and environmental impact
Solution Approach 2:
The composite adsorbent can be easily separated from treated water due to its particulate nature and polymer matrix structure, allowing for simple recovery and potential regeneration or disposal without expensive filtration equipment
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 method produces adsorbent flakes with a large surface area and high adsorption capacity, enabling efficient removal of pollutants like organic dyes from wastewater without requiring filtration systems, and can be reused after desorption.
Implementation Method 1
alkali-activating the dried olive stone pieces to obtain alkali-activated olive stone pieces
Implementation Method 2
pyrolyzing the alkali-activated olive stone pieces to obtain alkali-activated olive stone char
Implementation Method 3
acid-activating the alkali-activated olive stone char to obtain acid-activated olive stone char
Implementation Method 4
dissolving at least one polymer in an organic solvent to obtain a polymer solution; dispersing the acid-activated olive stone char in the polymer solution to obtain a mixture
Implementation Method 5
annealing the composite to provide the adsorbent
Implementation Method 6
The adsorbent flakes can be used for enhanced removal of pollutants from wastewater
Data Source
AI summary
A method of preparing an adsorbent can include pyrolyzing olive stone to provide an olive stone char, activating the olive stone char, dissolving a polymer in an organic solvent to obtain a solution, dispersing the activated olive stone char in the solution to provide a mixture, extracting the solvent from the mixture to provide a composite, and annealing the composite to provide the adsorbent. The adsorbent can be porous.