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Chemical interactions of aluminum with aqueous silica at 25 degrees Celsius Open

John David Hem, C. E. Roberson, Carol J. Lind, W.L. Polxer · 1973

Chemistry Materials science

Solutions containing from 10 -5 to 10 -2 moles per liter of aluminum and dissolved silica in various ratios were aged at pH levels between 4 and 10 at 25?C. A colloidal amorphous product having the composition of halloysite was produced in…

Solubility of aluminum in the presence of hydroxide, fluoride, and sulfate Open

C. E. Roberson, John David Hem · 1969

Chemistry

The total concentration of aqueous dissolved species of aluminum that will be present in equilibrium with microcrystalline gibbsite at various levels of complexing ligand concentration are shown graphically. The graphs can be used to estim…

Form and stability of aluminum hydroxide complexes in dilute solution Open

John David Hem, C. E. Roberson · 1967

Chemistry

Laboratory studies of solutions 4.53 x 10 -4 to 4.5 x 10 -5 molal (12.2-1.2 ppm) in aluminum, in 0.01 molal sodium perchlorate, were conducted to obtain information as to the probable behavior of aluminum in natural water. When the solutio…

Chemical composition of snow in the northern Sierra Nevada and other areas Open

J. H. Feth, Stanley M. Rogers, C. E. Roberson · 1964

Environmental science Geology Chemistry

Melting snow provides a large part of the water used throughout the western conterminous United States for agriculture, industry, and domestic supply. It is an active agent in chemical weathering, supplies moisture for forest growth, and s…

Ammoniated thermal waters of Lake and Colusa Counties, California Open

C. E. Roberson, H. C. M. Whitehead · 1961

Environmental science Geography Geology

Thermal springs in two areas north of San Francisco, Calif., contain nitrogen occurring as ammonia, nitrite, and nitrate.The nitrogen compounds show, in general, progressive oxidation with increasing distance downchannel from spring orific…

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