Granulated Olivine Filter for Heavy Metal Adsorption
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Solution Overview
Problem
Existing adsorption filters for heavy metals and organic environmental poisons face issues with stability, high investment costs, and low permeability, particularly with natural and synthetic organic filters which degrade and fail to effectively remove contaminants on an industrial scale.
Innovation Solution
A granulate composed of olivine, a magnesium-iron silicate, combined with a binder such as cement or water-insoluble polymers, is granulated to create a filter product with enhanced porosity and permeability, utilizing the olivine's inherent binding and adsorption capabilities for heavy metals and organic pollutants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fine particulate olivine powder is used for adsorption, then adsorption efficiency for heavy metals and organic pollutants is improved, but filter permeability deteriorates
Solution Approach 1:
The filter medium is segmented into granulated particles with controlled size distribution (0.5-5mm), creating a porous structure that allows water flow while maintaining adsorption capacity. The granulation process divides the fine particulate material into larger aggregates that preserve internal surface area while enabling external permeability.
Solution Approach 2:
The granulated olivine structure creates a hierarchical porous system with internal pores for adsorption and external macropores for fluid flow. This porous architecture allows water to permeate through the filter while contaminants are adsorbed on the extensive internal surface area of the granulated particles.
2Ease of manufacture
If natural organic filters are used, then cost is reduced, but stability and service life deteriorate
Solution Approach 1:
The filter combines olivine mineral particles with a polyacrylamide binder to create a composite material that integrates the advantages of both components. The olivine provides adsorption capacity and chemical stability, while the binder maintains structural integrity and prevents particle degradation, resulting in a stable, long-lasting filter with reasonable cost.
3Reliability
If activated coal is used for adsorption of organic pollutants, then adsorption capacity is improved, but investment cost deteriorates
Solution Approach 1:
The invention changes the material parameter from activated coal to olivine mineral, which has comparable adsorption capacity for organic pollutants but significantly lower processing costs. The olivine's natural porous structure and surface properties provide effective adsorption without requiring the expensive activation processes needed for coal-based filters.
4Adaptability or versatility
If coated filter products are used, then selectivity for different contaminants is improved, but active surface area deteriorates
Solution Approach 1:
Instead of coating the entire particle surface with a selective layer, the invention concentrates the binding function at specific locations within the granulated olivine structure. The olivine's natural surface properties provide selective adsorption for heavy metals and organic pollutants, while the bulk granulated structure maintains large surface area. This localized approach preserves active surface area while achieving contaminant selectivity.
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 granulated olivine filter product exhibits superior permeability and adsorption efficiency for heavy metals and organic pollutants, outperforming fine particulate olivine powder by maintaining high filtration rates while effectively removing contaminants from water, making it suitable for industrial and environmental applications.
Implementation Method 1
fine particulate olivine powder exhibits strong binding/adsorption of heavy metals such as arsenic, lead, cadmium, chrome, cupper, nickel, zinc and mercury
Implementation Method 2
a granulate for binding of environmental poisons, comprising a mixture of olivine material and binder in a mixing ratio with from 70 to 99 weight-% olivine material and 1 to 30 weight-% binder
Data Source
AI summary
SUMMARY The invention relates to a granulate for binding of environmental poisons. The granulate comprises mixture of olivine material and binder in a mixing ratio of 70 to 99 weight-% olivine material and from 1 to 30 weight-% binder. The granulate may be utilized as filter material for contaminated water.