Activated hybrid zero-valent iron treatment system and methods for generation and use thereof
US-2018111855-A1 · Apr 26, 2018 · US
Modification of iron-based media for water treatment
US10676376B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10676376-B2 |
| Application number | US-201715703028-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 13, 2017 |
| Priority date | Sep 29, 2016 |
| Publication date | Jun 9, 2020 |
| Grant date | Jun 9, 2020 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Methods of modification of zero-valent iron (ZVI) to improve its performance in removing contaminants from a discharge stream. In some aspects, the methods include contacting ZVI-impregnated disks with solutions containing metal cations such as Ni 2+ , Cu 2+ , Fe 2+ , or Pd 2+ . In some aspects, a wastewater stream is treated with a metal cation solution, then passed over ZVI. Compositions for treating wastewater include ZVI that is modified with a metal cation solution.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for treating a wastewater stream, the method comprising: contacting the wastewater stream with a solution containing one or more metal cations selected from the group consisting of nickel and copper to form a treated wastewater stream; contacting a ZVI with the treated wastewater stream; and separating oxidized iron and a contaminant selected from selenium, arsenic, nitrates, and any combination thereof from the wastewater stream. 2. The method of claim 1 , wherein the ZVI is bound to a solid support constructed from a material selected from ceramics, metals, polyethers, polyurethane, polyester, activated carbon, activated alumina, clays, and silica-based materials. 3. The method of claim 1 , wherein the concentration of metal cations is about 1 to about 500 ppm. 4. The method of claim 1 , wherein a pH of the wastewater stream is maintained at about 3 to about 7 at the time of contact with the ZVI. 5. The method of claim 4 , wherein the pH of the wastewater stream is maintained at about pH 6.0 at the time of contact with the ZVI.
Assignees
Inventors
Classifications
- C02F1/42Primary
by ion-exchange (ion-exchange in general B01J) · CPC title
using cation exchangers · CPC title
using inorganic sorbents · CPC title
Reduction by metals · CPC title
- B01J20/0229Primary
Compounds of Fe · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10676376B2 cover?
- Methods of modification of zero-valent iron (ZVI) to improve its performance in removing contaminants from a discharge stream. In some aspects, the methods include contacting ZVI-impregnated disks with solutions containing metal cations such as Ni 2+ , Cu 2+ , Fe 2+ , or Pd 2+ . In some aspects, a wastewater stream is treated with a metal cation solution, then passed over ZVI. Compositions for …
- Who is the assignee on this patent?
- Ecolab Usa Inc
- What technology area does this patent fall under?
- Primary CPC classification C02F1/42. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 09 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).