US 12590018 B1Patent grantUnited States

Calcium-Molybdate Sorbent for Wastewater

Official patent title

Nanocomposite for wastewater treatment

Arabic title: مركب نانوي لمعالجة مياه الصرف

Invention

Problem

Wastewater may contain persistent organic pollutants, heavy metals, metalloids, and radionuclides that conventional clarification, filtration, and biological methods do not reliably immobilize.

Why it matters

A porous multicomponent adsorbent could expand treatment research, but useful deployment requires verified capacity, selectivity, regeneration, molybdenum stability, real-water performance, and safe waste handling.

Approach

The method contacts contaminated water with a CaMoO4/CaSiO3/g-C3N4 particulate crystalline nanocomposite in a fixed-volume dispersion or membrane-flow arrangement to adsorb and immobilize contaminants.

Who may benefit

Potential beneficiaries include industrial-water researchers, wastewater operators, environmental-remediation laboratories, specialty adsorbent manufacturers, and hazardous-waste management teams.

Potential value

The disclosure combines three crystalline phases, mesoporous carbon-nitride nanosheets, defined particle and pore properties, and both batch and membrane contact modes.

Background

Industrial wastewater can carry dissolved metals and persistent organic compounds that are poorly addressed by processes aimed mainly at suspended solids or microbes. Adsorption can capture diverse solutes, while graphitic carbon nitride offers a modifiable nanosheet framework; however, low surface area, charge recombination, inconsistent porosity, and limited reuse can constrain nanocomposite performance. The publication integrates calcium molybdate, calcium silicate, and graphitic carbon nitride and specifies physical properties and contact formats. It does not report contaminant-specific capacity, removal percentage, kinetics, selectivity, regeneration, molybdenum leaching, real-effluent trials, or long-term stability.

Technology overview

The nanocomposite contains tetragonal CaMoO4, CaSiO3, and graphitic C3N4 in a stated weight ratio of (0.8-1.2):(0.8-1.2):(0.8-1.2). Substantially spherical particles have a Dv50 of 5–20 nm, and at least 80 wt. % of C3N4 can be mesoporous nanosheets. Average pore diameter is 15–25 nm, BET surface area is 60–100 m2/g, and pore volume is 0.1–0.5 cm3/g. Contact is 1–120 minutes using 0.1–5 g/L in dispersed batch or membrane flow.

Potential applications

Batch adsorption research for contaminated wastewater.
Adsorbent-loaded membrane-flow treatment studies.
Screening capture of organic pollutants, metals, and metalloids.
Licensed radionuclide immobilization research with controlled disposal.

Evidence-supported advantages

Three identified crystalline phases are integrated.
Particle, surface-area, pore-diameter, and pore-volume ranges are specified.
Both fixed-volume dispersion and membrane-flow operation are contemplated.
A multistep preparation route is disclosed.

Development stage

Laboratory synthesis and structural and pore characterization are described with proposed contact configurations; contaminant-specific performance, regeneration, leaching, real-water validation, scale-up, and commercial operation were not established.

Commercial opportunity

The concept may interest industrial-water and specialty-adsorbent developers, but commercial readiness is not established. Independent testing must quantify capacity, selectivity, kinetics, breakthrough, regeneration, competitive-ion effects, molybdenum and phase leaching, real-effluent performance, manufacturing consistency, energy, and cost. Radionuclide use additionally requires licensed operations, secondary-waste controls, and disposal qualification.

Patent classifications

WIPO IPC

C02F1/28Treatment of water, wastewater, sewage or sludge
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
B01J20/28004Chemical 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
B01J20/28019Chemical 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
B01J20/28061Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J20/28073Chemical 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
B01J20/2809Chemical 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
C02F1/283Treatment of water, wastewater, sewage or sludge
C02F2101/006Treatment of water, wastewater, sewage or sludge
C02F2101/108Treatment of water, wastewater, sewage or sludge
C02F2101/20Treatment of water, wastewater, sewage or sludge
C02F2101/22Treatment of water, wastewater, sewage or sludge
C02F2101/30Treatment of water, wastewater, sewage or sludge
C02F2101/305Treatment of water, wastewater, sewage or sludge
C02F2101/306Treatment of water, wastewater, sewage or sludge
C02F2101/327Treatment of water, wastewater, sewage or sludge
C02F2305/08Treatment of water, wastewater, sewage or sludge
Y02W10/37Climate-change mitigation technologies related to wastewater treatment or waste management

Inventors

First inventorMohamed Khairy Abdel Fattah Omran
InventorBabiker Yagoub Elhadi Abdulkhair

Keywords

calcium molybdate
calcium silicate
graphitic carbon nitride
adsorption
wastewater treatment
mesoporous nanosheets
membrane flow
contaminant immobilization

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.