Hailiang Dong

Mössbauer Spectroscopic Characterization of Fe Redox Process in Soil Minerals Coupled with Organic Matter Transformation in O2 Fluctuating Soils

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Limited Scope

Recent studies estimate that soil is one of the three largest reservoirs of organic matter (OM) on Earth. Soil carbon is a highly dynamic carbon repository, and its turnover has a major impact on…

Reactivity of iron-bearing phyllosilicates with uranium and chromium through redox transitions zones

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Large-Scale EMSL Research

Iron-bearing phyllosilicate minerals are widely distributed and often account for about half of the iron in soils and sediments. They play an important role in environmental processes such as…

Microbial role in disintegration and formation of clay mineral-organic matter associations

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Exploratory Research

Recent study estimates that soil is one of the three largest reservoirs of organic matter (OM) on Earth. Soil carbon is a highly dynamic carbon repository, and its turnover time has a major impact on…

The role of phyllosilicate minerals in mediating the temperature sensitivity of enzymatic activity in soil organic matter transformations

Lead Institution

Oregon State University

Principal Investigator

Markus Kleber

Project type

Large-Scale EMSL Research

The underlying idea of this proposal is the assumption that temperature sensitivity in multiple component systems can be expressed by a non-linear combination of two component systems. Our main…

Investigation of electron transfer reactions in bioreduced Fe-bearing clay minerals

Lead Institution

Stanford Linear Accelerator Center

Principal Investigator

Ritimukta Sarangi

Project type

Limited Scope

The focus of this project is to investigate the redox state of Fe in bioreduced clay minerals to understand the role of lignin in the Fe reduction process. Nontronite was used as an environmentally…

Technetium (Tc) reduction by chemically and biologically reduced smectite clay

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Exploratory Research

Oxidized form of technetium (Tc7+) is highly toxic and soluble when they are present in water systems(1). Large quantities of these radioactive heavy metals are released from storage tanks of…

Microbial Reduction of Illite and Glauconite

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Exploratory Research

This project investigates reduction of Fe(III) in structure of sedimentary illite and glauconite by Shewanella oneidensis CN32, and possible implications for bioremediation and subsurface microbial…

Reduction of Technetium by Fe(II) associated with reduced clay mineral nontronite

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Large-Scale EMSL Research

Because clay and clay-like minerals are commonly present at DOE sites (smectite, illite, chlorite, biotite), and they are potential backfill materials for nuclear waste repositories, the interaction…

Microbial Reduction of Iron in Sedimentary Clays:
Implications for Subsurface Microbial Ecology and Bioremediation

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Exploratory Research

Past studies have shown that certain subsurface bacteria are capable of utilizing oxidized forms of metals as electron acceptors, coupled with oxidation of organic matter. Most studies have focused…

Nanoscale Investigation of Microbial Role in Promoting the Smectite to Illite Transformation

Lead Institution

Miami University

Principal Investigator

Hailiang Dong

Project type

Exploratory Research

Smectite-illite interstratified clay minerals are ubiquitous in sedimentary basins. The smectite to illite transformation is linked to the maturation, migration and trapping of hydrocarbons, the…

EMSL Science Overview

Hailiang Dong

Projects

Mössbauer Spectroscopic Characterization of Fe Redox Process in Soil Minerals Coupled with Organic Matter Transformation in O2 Fluctuating Soils

Reactivity of iron-bearing phyllosilicates with uranium and chromium through redox transitions zones

Microbial role in disintegration and formation of clay mineral-organic matter associations

The role of phyllosilicate minerals in mediating the temperature sensitivity of enzymatic activity in soil organic matter transformations

Investigation of electron transfer reactions in bioreduced Fe-bearing clay minerals

Technetium (Tc) reduction by chemically and biologically reduced smectite clay

Microbial Reduction of Illite and Glauconite

Reduction of Technetium by Fe(II) associated with reduced clay mineral nontronite

Microbial Reduction of Iron in Sedimentary Clays:
Implications for Subsurface Microbial Ecology and Bioremediation

Nanoscale Investigation of Microbial Role in Promoting the Smectite to Illite Transformation