Flash Joule Heating Soil Remediation for Co-Contaminated Sites

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Solution Overview

Problem

Current soil remediation technologies are inefficient and costly, particularly for co-contaminated soils with heavy metals and organic pollutants, as they often require multiple processes, generate secondary pollution, and lack universality and energy efficiency.

Innovation Solution

The ultrafast flash Joule heating method involves mixing contaminated soil with conductive carbon additives and applying high-voltage pulses to decompose and evaporate heavy metals and convert organic pollutants into stable, non-toxic flash graphene, allowing for simultaneous removal without solvents or expensive chemicals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional soil remediation technologies are used for co-contaminated soils, then heavy metals and organic pollutants can be removed, but multiple separate processes are required, increasing device complexity and cost

Engineering Contradiction:

Improveremediation capabilityVSAvoidprocess complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the removal of heavy metals and organic pollutants into a single flash Joule heating process. The contaminated soil is mixed with conductive carbon additives, and a voltage pulse is applied to generate rapid localized heating that simultaneously volatilizes heavy metals and carbonizes organic pollutants, eliminating the need for multiple separate remediation processes

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The flash Joule heating system serves multiple functions: it removes heavy metals through volatilization, decomposes organic pollutants through carbonization, and can be applied to various types of contaminated soil with different pollutant compositions, making it a universal remediation solution

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If traditional remediation methods are applied, then pollutants can be removed, but expensive chemicals and solvents are required, increasing cost and potential secondary pollution

Engineering Contradiction:

Improveremediation effectivenessVSAvoidchemical consumption

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

The conductive carbon additives mixed with contaminated soil serve dual purposes: they enable the flash Joule heating process by providing electrical conductivity, and they act as the heating medium that transfers thermal energy to the pollutants. The system uses its own components (carbon additives and electrical energy) rather than requiring external chemicals or solvents for pollutant removal

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces chemical-based remediation methods (using chemicals and solvents) with an electrical-thermal system. Voltage pulses generate Joule heating that directly thermally processes the pollutants, substituting chemical reactions with electrical energy conversion and thermal effects

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If conventional remediation processes are used, then treatment can be achieved, but energy consumption is high and treatment time is long

Engineering Contradiction:

Improveremediation speedVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The system uses pulsed voltage application rather than continuous heating. The voltage is applied in short pulses (milliseconds to seconds) to generate rapid temperature spikes that achieve pollutant removal, followed by cooling periods. This periodic action reduces overall energy consumption while maintaining high remediation speed

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The flash Joule heating process rushes through the remediation step by creating extremely rapid heating rates (millions of degrees per second). The voltage pulse delivers energy so quickly that pollutants are volatilized or carbonized in milliseconds, skipping the slow gradual heating process of conventional methods and achieving both speed and energy efficiency

Inventive Principle:

Principle #21Skipping (Rushing through)

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

This method achieves efficient and cost-effective removal of heavy metals and organic pollutants, reducing contamination to safe levels with minimal energy consumption and no secondary pollution, offering a versatile and scalable solution for soil remediation.

Implementation Method 1

applying high-voltage pulses to decompose and evaporate heavy metals and convert organic pollutants into stable, non-toxic flash graphene

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

evaporate heavy metals

Methodology Applied

Scientific EffectEvaporation: Evaporation

Implementation Method 3

convert organic pollutants into stable, non-toxic flash graphene

Methodology Applied

Scientific EffectPyrolysis: Pyrolysis

Data Source

PatentUS20240116094A1Ultrafast flash joule heating synthesis methods and systems for performing same

Publication Date: 2024.04.11 WILLIAM MARCH RICE UNIVERSITY

AI summary

Method and system for soil remediation by flash Joule heating. A contaminated soil that includes organic pollutants and/or one or more metal pollutants can be mixed with carbon black or other conductive additive to form a mixture. The mixture then undergoes flash Joule heating to clean the soil (by the decomposing of the organic pollutants and/or removing of the one or more toxic metals, such as by vaporization).