Porous Titanium Adsorbent for Lead Removal at High pH
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Solution Overview
Problem
Conventional zeolite and amorphous titanosilicate adsorbents are ineffective in removing lead from water with a pH of 8 or more, as they fail to adsorb colloidal lead hydroxide that forms at higher pH levels.
Innovation Solution
A porous body of a titanium-containing compound with a bulk specific gravity of 0.4 g/cm3 or less, a BET specific surface area of 50 m2/g or more, and a pore volume of 0.02 cm3/g or more is used to effectively adsorb lead from water with a pH of 8 or more, potentially combined with additional heavy metal adsorbing substances like zeolite or amorphous titanosilicate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional zeolite or amorphous titanosilicate is used as an adsorbent, then lead ions in water with pH less than 8 can be adsorbed, but lead in water with pH of 8 or more cannot be sufficiently adsorbed
Solution Approach 1:
The invention changes the physical parameters of the adsorbent by controlling bulk specific gravity to 0.4 g/cm³ or less, creating a porous structure that enables adsorption of colloidal lead hydroxide at high pH conditions where conventional adsorbents fail
Solution Approach 2:
The invention uses a composite adsorbent system combining porous titanium-containing compound with conventional adsorbents like zeolite or amorphous titanosilicate, where each component targets different lead species depending on pH conditions, achieving broad-spectrum lead removal
2Reliability
If porous body of titanium-containing compound with bulk specific gravity of 0.4 g/cm3 or less is used, then lead in water with pH of 8 or more can be adsorbed, but the adsorbent structure becomes more complex to manufacture
Solution Approach 1:
The invention utilizes porous titanium-containing compounds with controlled bulk specific gravity of 0.4 g/cm³ or less, where the porous structure provides high surface area and accessibility for adsorbing colloidal lead hydroxide, achieving effective lead removal at high pH conditions
Solution Approach 2:
The invention controls specific physical parameters including bulk specific gravity (≤0.4 g/cm³), pore volume (≥0.02 cm³/g), and BET specific surface area (≥50 m²/g) to optimize the balance between adsorption performance and manufacturability
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 titanium-containing compound adsorbent significantly improves lead removal from water with elevated pH levels, providing a product value not achieved by conventional adsorbents, and can be used in water purifiers to enhance heavy metal removal capabilities.
Implementation Method 1
a porous body of a titanium-containing compound, which has a bulk specific gravity in a specific range, can adsorb lead in water with a pH of 8 or more
Data Source
AI summary
To provide a material capable of adsorbing lead from water with a pH of 8 or more. A porous body of a titanium-containing compound, which has a bulk specific gravity of 0.4 g/cm3 or less, is used as an adsorbent.