Calcium-Vanadate Sorbent for Water Cleanup
Official patent title
Removal of water pollutant using calcium metavanadate/calcium silicate/graphite-phase carbon nitride (CaV2O6/CaSiO3/g-C3N4) nanocomposite
Arabic title: إزالة ملوثات المياه باستخدام مركب نانوي من ميتافانادات الكالسيوم/سيليكات الكالسيوم/نتريد الكربون بطور الغرافيت (CaV2O6/CaSiO3/g-C3N4)
Invention
Invention
Problem
Dyes and other industrial pollutants can persist in wastewater, while unmodified g-C3N4 has limited surface area and rapid charge recombination and conventional removal methods can create cost or secondary-waste constraints.
Why it matters
A porous multicomponent adsorbent could support rapid pollutant-removal studies, but selectivity, vanadium release, particle recovery, regeneration, spent-media disposal, mixed-water performance, and lifecycle impacts require independent verification.
Approach
The method contacts pollutant-containing water with a porous CaV2O6/CaSiO3/g-C3N4 composite so contaminants adsorb on its surface, within its pores, or both.
Who may benefit
Potential beneficiaries include wastewater researchers, dye-intensive industries, adsorbent manufacturers, environmental laboratories, water-treatment developers, and materials teams studying vanadate/carbon-nitride composites.
Potential value
The disclosure combines balanced component ranges, slit-shaped porosity, defined adsorption capacity and kinetics, and a nanowire/nanosheet morphology in one water-treatment material.
Background
Background
Dyes from food, cosmetics, textiles, leather, and packaging can enter wastewater, while heavy metals from manufacturing, mining, batteries, paints, and paper production create additional treatment needs. Adsorption is widely studied because it can remove low contaminant concentrations through comparatively simple operations. Graphitic carbon nitride is stable and visible-light responsive, but its low specific surface area and difficult exfoliation can limit adsorption. The publication uses calcium metavanadate and calcium silicate with g-C3N4 to form a porous multicomponent surface for pollutant uptake.
Technology overview
Technology overview
The claimed composite contains 20 to 40 wt. % each of g-C3N4, CaSiO3, and CaV2O6. It has slit-shaped pores, an average pore diameter of 3 to 15 nm, a pore volume of 0.2 to 0.25 cm3g−1, and a BET surface area of 50 to 65 m2g−1. The stated adsorption capacity is 35 to 45 mg of pollutant per gram. Claims also define time-dependent uptake, nanowires distributed between nanosheets, kinetic models, contact duration, and organic-pollutant use.
Potential applications
Potential applications
- Potential adsorption of organic pollutants from water.
- Screening against dye-bearing industrial wastewater.
- Development of porous nanowire/nanosheet sorbent media.
- Research on calcium-vanadate/calcium-silicate/carbon-nitride adsorption.
Evidence-supported advantages
Evidence-supported advantages
- Uses three components within explicit weight-percentage ranges.
- Provides slit-shaped pores and defined pore and surface-area values.
- States adsorption-capacity and time-dependent uptake ranges.
- Combines oxide nanowires with g-C3N4 nanosheets.
Development stage
Development stage
The patent publication states adsorption-capacity and time-dependent removal ranges; commercialization was not established, and the reported performance and development stage were not independently verified.
Commercial opportunity
Commercial opportunity
The composite could support sorbent licensing or collaborative wastewater testing. Commercial work should verify pollutant identity and selectivity, capacity in mixed effluents, vanadium and particle release, material separation, hydraulic performance, regeneration cycles, spent-sorbent disposal, manufacturing repeatability, and lifecycle cost against established media.
Patent classifications
Patent classifications
WIPO IPC
- B01J20/10Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/06Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
CPC
- B01J20/06Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/10Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28007Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28059Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28071Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28083Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/3078Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C02F1/288Treatment of water, wastewater, sewage or sludge
- C02F1/281Treatment of water, wastewater, sewage or sludge
- C02F2101/308Treatment of water, wastewater, sewage or sludge
- C02F2305/08Treatment of water, wastewater, sewage or sludge
Inventors
Inventors
- First inventorMohamed Khairy Abdel Fattah Omran
- InventorBabiker Yagoub Elhadi Abdulkhair
Keywords
Keywords
- adsorption
- CaV2O6
- CaSiO3
- g-C3N4
- water pollutant
- dye removal
- porous nanocomposite
- wastewater
Patent document and drawings
Patent document and drawings
The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.