Basalt Fiber Adsorption for Toxic Sediment Removal
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Solution Overview
Problem
Existing methods are inadequate for effectively removing toxic materials such as dioxins, furans, polychlorinated biphenyls, and heavy metals from sediments and water, particularly in environments like the San Jacinto River Waste Pits Superfund Site, where these contaminants are prevalent.
Innovation Solution
The use of basalt, in various forms, to adsorb these toxic materials by contacting sediment or water with basalt for an effective duration, allowing selective removal of dioxins, furans, PCBs, and metals onto or into the basalt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to remove toxic materials from sediments and water, then the process is simple and easy to operate, but the removal efficiency is inadequate and cannot achieve effective removal rates
Solution Approach 1:
The patent employs basalt fiber, a porous material, to adsorb toxic materials from sediments and water. The porous structure of the basalt fiber provides extensive surface area for adsorption, enabling effective removal of dioxins, furans, PCBs, and heavy metals while maintaining operational simplicity
Solution Approach 2:
The invention uses composite material structures combining basalt fiber with appropriate matrices or coatings to enhance adsorption capacity. This composite approach improves removal efficiency for multiple toxic substances simultaneously while keeping the system relatively simple to implement
2Productivity
If existing removal methods are applied to toxic materials in the San Jacinto River Waste Pits, then the operation is straightforward, but the removal rate fails to achieve the required 25-99 wt% reduction
Solution Approach 1:
The patent optimizes parameters such as basalt fiber dosage, contact time, and environmental conditions (pH, temperature) to achieve consistent and reliable removal rates. By controlling these parameters, the system achieves the required 25-99 wt% reduction in toxic materials while maintaining operational reliability
Solution Approach 2:
The basalt fiber material inherently possesses adsorption properties that enable it to passively remove toxic substances without requiring complex external energy input or sophisticated control systems. This self-service characteristic ensures consistent removal performance while keeping the process reliable and easy to operate
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
Basalt effectively adsorbs a significant portion of these toxic materials, achieving removal rates of at least 25-99 wt% depending on the specific embodiment, with examples showing up to 200% recovery of dioxins and furans from sediment, and substantial reduction of heavy metals from aqueous solutions.
Implementation Method 1
contacting a substance that comprises water and at least one toxic material with an effective amount of basalt for a period of time effective to remove at least a portion of the at least one toxic material from the sediment into the basalt, for instance by adsorption
Data Source
AI summary
Basalt selectively adsorbs organic toxic materials, such as dioxins, furans, polychlorinated biphenyls (PCBs), bis(2-ethylhexyl)phthalate, arsenic, mercury, chromium, copper, nickel, zinc, cadmium, lead, and the like, from substances such as sediment, which contains water and the toxic materials.