Green Rust: Its Electrochemical Generation, Characterization, and Implications

Gomes, Jewel; Cocke, David; Moreno, Hector; Tran, Doanh; Mahmud, Appel; Das, Kamol; Guttula, Mallikarjuna

Green Rust: Its Electrochemical Generation, Characterization, and Implications

Active / Technical Report | Accession Number: ADA535806 |

Open PDF

Abstract:

Green rust is an important intermediate in oxidative transformation of FeII phase. This unstable compound contains a mixture of ferrous and ferric hydroxides that belong to a family of minerals known as layered double hydroxides LDH. Its general formula is FeII 6-x FeIII x OH12xAxn- yH2O x-, where A is an n-valent anion mainly Cl-, CO3 -2 and SO4 -2 , and in which either the bivalent or the trivalent iron can be replaced for other trivalent or bivalent metal ions. It was first identified as corrosion product, later in soils as a product of interactions between microbes and metals in soils. Due to its high reactivity, it is used in the reduction of organic and inorganic compounds, As removal, and the treatment of acid mine drainage. In this paper, we described the method of electrochemical generation of green rust, its characterization by XRD, SEM and FTIR and its implications to electrocoagulation.

Author(s):

Gomes, Jewel ; Cocke, David ; Moreno, Hector ; Tran, Doanh ; Mahmud, Appel ; Das, Kamol ; Guttula, Mallikarjuna

Author Organization(s):

LAMAR UNIV BEAUMONT TX

Descriptive Note:

Conference paper

Supplementary Note:

See also ADM002300. Presented at the Minerals, Metals and Materials Annual Meeting and Exhibition (138th)(TMS 2009) Held in San Francisco, California on February 15-19, 2009. Sponsored in part by the Navy. U.S. Government or Federal Purpose Rights.. The original document contains color images.

Pagination:

0009

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

Distribution Statement:

Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR

Identifying Numbers

Monitor Series:

USDA

Subject Terms

Joint Capability Areas:

JCA_1.2.7_Experimentation; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating; JCA_4.6_Engineering; JCA_5_Command and Control; JCA_8_Building Partnerships

Communities of Interest:

Energy and Power Technologies

Descriptor(s):

*RUST(OXIDATION), *IRON, X RAY DIFFRACTION, SCANNING ELECTRON MICROSCOPY, HYDROXIDES, CORROSION, INFRARED SPECTROSCOPY, ELECTROCHEMISTRY

Field(s)/Group(s):

Physical Chemistry, Properties of Metals and Alloys

Keyword(s):

GREEN RUST, ELECTROCOAGULATION, LAYERED DOUBLE HYDROXIDE, ELECTROCHEMICAL GENERATION

Report Date:

2009 Feb 01

Creation Date:

2011 Feb 09