John David Hem

1916

• Nonequilibrium systems in natural water chemistry
• Calculation and use of ion activity
• Chemical equilibria and rates of manganese oxidation
• Chemical interactions of aluminum with aqueous silica at 25⁰C
• Composition of saline residues on leaves and stems of saltcedar (Tamarix pentandra Pallas)
• Deposition and solution of manganese oxides
• Form and stability of aluminum hydroxide complexes in dilute solution
• Graphical methods for studies of aqueous aluminum hydroxide, fluoride, and sulfate complexes
• Quality of water of the Gila River Basin above Coolidge Dam, Arizona
• Quality of water, Conchas Reservoir, New Mexico, 1939-49
• Restraints on dissolved ferrous iron imposed by bicarbonate redox potential, and pH
• Solubility of aluminum in the presence of hydroxide, fluoride, and sulfate