Bisphenol-S Mannich Polycondensation for Heavy Metal Adsorption
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Solution Overview
Problem
Current methods for removing heavy metal ions, such as lead, from aqueous solutions are not sufficiently efficient, particularly in achieving zero contamination levels in drinking water, and there is a need for more effective adsorbing materials to facilitate selective heavy metal removal in water systems.
Innovation Solution
Crosslinked polymers produced from polycondensation reactions of cyclic diaminoalkane, an aldehyde, and a bisphenol-S compound or melamine are used to adsorb heavy metal ions, specifically lead(II), through a method involving contact with an aqueous solution followed by filtration, optimizing parameters like molar ratios, particle size, and contact conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adsorption methods are used to remove heavy metal ions from aqueous solutions, then some removal capability is achieved, but the removal efficiency is insufficient to reach zero contamination levels
Solution Approach 1:
The patent modifies the chemical structure of adsorbent materials by incorporating specific functional groups (amino, hydroxyl, carboxyl) and optimizing their ratios to enhance metal ion binding capacity. The crosslinking density and pore structure parameters are also adjusted to improve adsorption efficiency and achieve near-complete removal of heavy metals
Solution Approach 2:
The invention employs composite adsorbent materials combining organic polymers with inorganic components or multiple functional moieties. These composite structures integrate the advantages of different materials to provide both high adsorption capacity and selectivity for heavy metal ions, enabling contamination levels to approach zero
2Reliability
If adsorption materials are designed to achieve high selectivity for heavy metal removal, then removal efficiency improves, but the complexity of material synthesis and optimization increases
Solution Approach 1:
The patent introduces specific functional groups at localized positions within the adsorbent structure to create high-affinity binding sites for heavy metal ions. By concentrating reactive functional moieties (amino, hydroxyl, carboxyl groups) at strategic locations, the material achieves high selectivity without requiring complex overall structures
Solution Approach 2:
The synthesis methodology employs pre-formed functional monomers and standardized crosslinking protocols that simplify the overall material production process. By preparing functionalized building blocks beforehand and using systematic synthesis approaches, the patent reduces synthesis complexity while maintaining high removal efficiency
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 crosslinked polymers demonstrate high efficiency in removing heavy metal ions, with greater than 95% of Pb(II) being removed from aqueous solutions, and exhibit enhanced properties such as semi-crystalline structure and BET surface area, making them effective for wastewater treatment.
Implementation Method 1
The crosslinked polymers demonstrate high efficiency in removing heavy metal ions, with greater than 95% of Pb(II) being removed from aqueous solutions, and exhibit enhanced properties such as semi-crystalline structure and BET surface area
Data Source
AI summary
Crosslinked polymers made up of polymerized units of cyclic diaminoalkane, aldehyde and bisphenol-S or melamine. A method for removing heavy metals, such as Pb(II) from an aqueous solution or an industrial wastewater sample with these crosslinked polymers is introduced. A process of synthesizing the crosslinked polymers is also described.