Boron-Selective Sorbent Compositions for Aqueous Mediums
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Solution Overview
Problem
Existing technologies are not readily adaptable for in-situ treatment to remove boron from aqueous mediums, and there is a need for a long-lasting, high-capacity boron sorbent.
Innovation Solution
A sorbent composition is developed by combining a high surface area base sorbent material, such as activated carbon or biochar, with a boron-selective agent to enhance boron removal from aqueous solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional water treatment methods are used, then boron removal is achieved, but the cost is high and the methods are not readily adaptable for in-situ treatment
Solution Approach 1:
The patent employs activated carbon, a porous material with high surface area and adsorptive capacity, as the base sorbent. The porous structure provides numerous active sites for boron adsorption while maintaining physical stability for in-situ deployment. This resolves the contradiction by providing a material that is both effective for boron removal and adaptable for field applications.
Solution Approach 2:
The patent creates a composite sorbent by combining activated carbon with boron-selective agents (such as polyols, amino acids, or other functional compounds). This composite structure leverages the high surface area of activated carbon and the specific boron affinity of the selective agent, achieving both high removal effectiveness and adaptability for various in-situ treatment scenarios.
2Reliability
If boron specific ion exchange resins are used, then selective boron removal is achieved, but the resin is limited by hydrophobicity, moderate surface area, large chemical requirements for regeneration, and high price
Solution Approach 1:
The patent employs activated carbon-based sorbents that can be used in single-pass or limited-cycle applications without requiring complex regeneration systems. The sorbent can be disposed of or replaced after use, eliminating the need for large chemical requirements for regeneration that plague ion exchange resins. This resolves the contradiction by providing a simpler, more practical solution for selective boron removal.
Solution Approach 2:
The patent modifies the surface properties of activated carbon by incorporating boron-selective agents that enhance boron affinity. This chemical modification changes the interaction parameters between the sorbent and boron, achieving selective removal comparable to ion exchange resins but without the associated regeneration complexity and cost.
3Quantity of substance
If high surface area base sorbent material is used, then capacity for boron sequestration is increased, but the cost may increase
Solution Approach 1:
The patent combines relatively inexpensive activated carbon with small amounts of boron-selective agents to create a composite sorbent. This approach achieves high boron sequestration capacity through the synergistic effect of the high surface area carbon matrix and the selective binding sites provided by the additive, while keeping overall costs lower than using expensive specialized resins.
Solution Approach 2:
The patent applies boron-selective agents locally on the surface of activated carbon particles rather than requiring the entire material to have uniform high-cost properties. This localized enhancement of boron affinity at critical surface sites achieves high sequestration capacity while minimizing the use of expensive materials.
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 sorbent composition achieves high capacity boron sequestration with a relatively low cost, effectively addressing the limitations of existing boron removal technologies.
Implementation Method 1
The boron-selective agent may be selected from several compounds (e.g., classes of compounds) that are selected to enhance the sequestration of boron by the base sorbent material, such as by forming stable molecular complexes with the boron.
Implementation Method 2
A boron-selective agent is combined with (e.g., deposited on) the base sorbent material. By using a boron-selective agent in conjunction with a high surface area base sorbent material such as activated carbon or biochar, a sorbent composition with a high capacity for sequestering boron is provided.
Data Source
AI summary
Sorbent compositions that include a base sorbent material having a high porosity and surface area and a boron-selective agent are particularly useful for the sequestration of boron from waste materials such as coal combustion residual leachate (CCRs). By using a boron-selective agent in conjunction with a high surface area base sorbent material such as activated carbon or biochar, a sorbent composition with a high capacity for sequestering boron at relatively low cost is provided.