Xionghan Feng, a Professor of Soil Chemistry, received a Ph.D. in soil science and joined the faculty at the Huazhong Agricultural University in 2003. He spent more than two years at the University of Delaware in the Delaware Environmental Institute (DENIN) as a visiting scientist through 2007 to 2012. His research focuses on mineralogy, reactivity and environmental behaviors of Fe, Mn and Al (hydr)oxides in soils.Wei Li is a Professor of geochemistry at the Nanjing University in the Department of Earth Sciences. His research focuses on mineral-water interfacial geochemistry and soil metal biogeochemistry as well as the application of fundamental principles of geochemistry in soil remediation and water decontamination. Li holds a B.S. in chemistry from the Wuhan University, a M.S in environmental chemistry at the Research Center of Eco-Environmental Sciences of Chinese Academy of Sciences, and a Ph.D. inmineralogy and geochemistry from the State University of New York at Stony Brook. He performed a postdoc at the University of Delaware in the Delaware Environmental Institute (DENIN). He has published 26 papers in peer-reviewed journals such as Nature Communications, Environmental Science &Technology, and Geochemical Cosmochimical Acta.Mengqiang Zhu is an assistant professor at the University of Wyoming in the Department of Ecosystem Science and Management. Mengqiang Zhu holds a B.S. in Environmental Engineering from North China Electric Power University, M.S. in Environmental Chemistry from the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, and Ph.D. in Environmental Soil Chemistry at the University of Delaware. After postdoctoral research at the Lawrence Berkeley National Laboratory, he joinedthe faculty at the University of Wyoming in 2013.Donald L. Sparks is the S. Hallock du Pont Chair in Soil and Environmental Chemistry, Francis Alison Professor and Director of the Delaware Environmental Institute at the University of Delaware. He is internationally recognized for research on the kinetics of soil chemical processes, sorption mechanisms of metal(loid)s and nutrients at the mineral/water interface, and speciation of contaminants in soils. Sparks is the author of three textbooks, editor of several books, and author of numerousbook chapters and 235 refereed papers.

• 1. Advances in Understanding Reactivity of Manganese Oxides with Arsenic and Chromium in Environmental Systems2. Metal Contaminant Oxidation Mediated by Manganese Redox Cycling in Subsurface Environment 3. Mechanistic Understanding of Metal Sorption by Phyllomanganates through Density Functional Theory 4. The Role of Surface Edge Sites in Metal(loid) Sorption to Poorly-Crystalline Birnessites 5. Reactivity of Natural Mn Oxide Cryptomelane 6. Transformation from Phyllomanganates to Todorokite under Various Conditions: A Review of Implication for Formation Pathway of Natural Todorokite 7. Manganese-Oxide Solids as Water-Oxidation Electrocatalysts: The Effect of Intercalating Cations 8. In Situ Immobilization of Arsenic in Water and Soil Using Polysaccharide Stabilized Iron Manganese Binary Oxide Nanoparticles 9. Synthesis of a Biotemplated Lithium Ion-Sieve Derived from Fungally Formed Birnessite 10. Influence of Biomacromolecules on the Stability of Colloidal Manganese Dioxide

Xionghan Feng, a Professor of Soil Chemistry, received a Ph.D. in soil science and joined the faculty at the Huazhong Agricultural University in 2003. He spent more than two years at the University of Delaware in the Delaware Environmental Institute (DENIN) as a visiting scientist through 2007 to 2012. His research focuses on mineralogy, reactivity and environmental behaviors of Fe, Mn and Al (hydr)oxides in soils.Wei Li is a Professor of geochemistry at the Nanjing University in the Department of Earth Sciences. His research focuses on mineral-water interfacial geochemistry and soil metal biogeochemistry as well as the application of fundamental principles of geochemistry in soil remediation and water decontamination. Li holds a B.S. in chemistry from the Wuhan University, a M.S in environmental chemistry at the Research Center of Eco-Environmental Sciences of Chinese Academy of Sciences, and a Ph.D. inmineralogy and geochemistry from the State University of New York at Stony Brook. He performed a postdoc at the University of Delaware in the Delaware Environmental Institute (DENIN). He has published 26 papers in peer-reviewed journals such as Nature Communications, Environmental Science &Technology, and Geochemical Cosmochimical Acta.Mengqiang Zhu is an assistant professor at the University of Wyoming in the Department of Ecosystem Science and Management. Mengqiang Zhu holds a B.S. in Environmental Engineering from North China Electric Power University, M.S. in Environmental Chemistry from the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, and Ph.D. in Environmental Soil Chemistry at the University of Delaware. After postdoctoral research at the Lawrence Berkeley National Laboratory, he joinedthe faculty at the University of Wyoming in 2013.Donald L. Sparks is the S. Hallock du Pont Chair in Soil and Environmental Chemistry, Francis Alison Professor and Director of the Delaware Environmental Institute at the University of Delaware. He is internationally recognized for research on the kinetics of soil chemical processes, sorption mechanisms of metal(loid)s and nutrients at the mineral/water interface, and speciation of contaminants in soils. Sparks is the author of three textbooks, editor of several books, and author of numerousbook chapters and 235 refereed papers.

• 1. Advances in Understanding Reactivity of Manganese Oxides with Arsenic and Chromium in Environmental Systems2. Metal Contaminant Oxidation Mediated by Manganese Redox Cycling in Subsurface Environment 3. Mechanistic Understanding of Metal Sorption by Phyllomanganates through Density Functional Theory 4. The Role of Surface Edge Sites in Metal(loid) Sorption to Poorly-Crystalline Birnessites 5. Reactivity of Natural Mn Oxide Cryptomelane 6. Transformation from Phyllomanganates to Todorokite under Various Conditions: A Review of Implication for Formation Pathway of Natural Todorokite 7. Manganese-Oxide Solids as Water-Oxidation Electrocatalysts: The Effect of Intercalating Cations 8. In Situ Immobilization of Arsenic in Water and Soil Using Polysaccharide Stabilized Iron Manganese Binary Oxide Nanoparticles 9. Synthesis of a Biotemplated Lithium Ion-Sieve Derived from Fungally Formed Birnessite 10. Influence of Biomacromolecules on the Stability of Colloidal Manganese Dioxide

Xionghan Feng, a Professor of Soil Chemistry, received a Ph.D. in soil science and joined the faculty at the Huazhong Agricultural University in 2003. He spent more than two years at the University of Delaware in the Delaware Environmental Institute (DENIN) as a visiting scientist through 2007 to 2012. His research focuses on mineralogy, reactivity and environmental behaviors of Fe, Mn and Al (hydr)oxides in soils.Wei Li is a Professor of geochemistry at the Nanjing University in the Department of Earth Sciences. His research focuses on mineral-water interfacial geochemistry and soil metal biogeochemistry as well as the application of fundamental principles of geochemistry in soil remediation and water decontamination. Li holds a B.S. in chemistry from the Wuhan University, a M.S in environmental chemistry at the Research Center of Eco-Environmental Sciences of Chinese Academy of Sciences, and a Ph.D. inmineralogy and geochemistry from the State University of New York at Stony Brook. He performed a postdoc at the University of Delaware in the Delaware Environmental Institute (DENIN). He has published 26 papers in peer-reviewed journals such as Nature Communications, Environmental Science &Technology, and Geochemical Cosmochimical Acta.Mengqiang Zhu is an assistant professor at the University of Wyoming in the Department of Ecosystem Science and Management. Mengqiang Zhu holds a B.S. in Environmental Engineering from North China Electric Power University, M.S. in Environmental Chemistry from the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, and Ph.D. in Environmental Soil Chemistry at the University of Delaware. After postdoctoral research at the Lawrence Berkeley National Laboratory, he joinedthe faculty at the University of Wyoming in 2013.Donald L. Sparks is the S. Hallock du Pont Chair in Soil and Environmental Chemistry, Francis Alison Professor and Director of the Delaware Environmental Institute at the University of Delaware. He is internationally recognized for research on the kinetics of soil chemical processes, sorption mechanisms of metal(loid)s and nutrients at the mineral/water interface, and speciation of contaminants in soils. Sparks is the author of three textbooks, editor of several books, and author of numerousbook chapters and 235 refereed papers.

• 1. Advances in Understanding Reactivity of Manganese Oxides with Arsenic and Chromium in Environmental Systems2. Metal Contaminant Oxidation Mediated by Manganese Redox Cycling in Subsurface Environment 3. Mechanistic Understanding of Metal Sorption by Phyllomanganates through Density Functional Theory 4. The Role of Surface Edge Sites in Metal(loid) Sorption to Poorly-Crystalline Birnessites 5. Reactivity of Natural Mn Oxide Cryptomelane 6. Transformation from Phyllomanganates to Todorokite under Various Conditions: A Review of Implication for Formation Pathway of Natural Todorokite 7. Manganese-Oxide Solids as Water-Oxidation Electrocatalysts: The Effect of Intercalating Cations 8. In Situ Immobilization of Arsenic in Water and Soil Using Polysaccharide Stabilized Iron Manganese Binary Oxide Nanoparticles 9. Synthesis of a Biotemplated Lithium Ion-Sieve Derived from Fungally Formed Birnessite 10. Influence of Biomacromolecules on the Stability of Colloidal Manganese Dioxide