Arsenic sorbent for remediating arsenic-contaminated material
US8227378B2 · kind B2 · utility
0Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2011 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jul 28, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/515
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An arsenic sorbent includes monohydrocalcite that has been precipitated by mixing an aqueous solution of a soluble carbonate or a carbonate with an aqueous solution that includes an Mg2+ ion and a Ca2+ ion in a ratio “Mg/Ca” of 0.3 or more, the monohydrocalcite having a molar ratio “Mg/(Ca+Mg)” of 0.1 or less. The arsenic sorbent exhibits a high arsenic sorption ability, and can stably retain a sorbate. A purification method using the same is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.