THE SOLUBILITY OF URANIUM(IV) HYDROXIDE IN SOLUTIONS OF SODIUM HYDROXIDE AND PERCHLORIC ACID AT 25 °C

1957 ◽  
Vol 35 (1) ◽  
pp. 5-7 ◽  
Author(s):  
K. H. Gayer ◽  
H. Leider
Keyword(s):  
Sodium Hydroxide ◽  
Perchloric Acid ◽  
Acid Solutions ◽  
Hydroxide Water

The solubility of uranium(IV) hydroxide has been measured in sodium hydroxide, water, and perchloric acid solutions. A possible reaction in sodium hydroxide solutions is evaluated.

A REDETERMINATION OF THE RELATIVE ENTHALPIES OF AQUEOUS PERCHLORIC ACID SOLUTIONS FROM 1 TO 24 MOLAL

1956 ◽  
Vol 34 (11) ◽  
pp. 1591-1595 ◽  
Author(s):  
D. R. Bidinosti ◽  
W. J. Biermann
Keyword(s):  
Sodium Hydroxide ◽  
Perchloric Acid ◽  
Enthalpies Of Formation ◽  
Acid Solutions ◽  
Aqueous Perchloric Acid

Previous tabulations of enthalpies of formation of perchloric acid solutions are not in agreement with the behavior expected for an acid as highly dissociated as perchloric acid. Measurements of the heats of neutralization of perchloric acid solutions with sodium hydroxide solutions were made and new values of the relative apparent partial molal enthalpies of perchloric acid solutions in the range 1 to 24 molal were computed from these. These new values agree with the anticipated behavior of perchloric acid.

The Solubility Of UO2HPO4.4H2O in Perchloric Acid Solutions

1955 ◽  
Vol 59 (11) ◽  
pp. 1179-1181 ◽  
Author(s):  
James M. Schreyer ◽  
C. F. Baes
Keyword(s):  
Perchloric Acid ◽  
Acid Solutions

Electrochemical behaviour of galena (PbS) in aqueous nitric acid and perchloric acid solutions

2004 ◽  
Vol 34 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Yu. Mikhlin ◽  
A. Kuklinskiy ◽  
E. Mikhlina ◽  
V. Kargin ◽  
I. Asanov
Keyword(s):  
Nitric Acid ◽  
Perchloric Acid ◽  
Electrochemical Behaviour ◽  
Acid Solutions ◽  
Aqueous Nitric Acid

Pulse and γ-radiolysis of concentrated perchloric acid solutions

1996 ◽  
Vol 92 (12) ◽  
pp. 2245-2250 ◽  
Author(s):  
M. Domae ◽  
Y. Katsumura ◽  
P. Y. Jiang ◽  
R. Nagaishi ◽  
K. Ishigure ◽  
...  
Keyword(s):  
Perchloric Acid ◽  
Acid Solutions

scholarly journals Recovery of Zinc from Treatment of Spent Acid Solutions from the Pickling Stage of Galvanizing Plants

2021 ◽  
Vol 13 (1) ◽  
pp. 407
Author(s):  
Svetlana B. Zueva ◽  
Francesco Ferella ◽  
Valentina Innocenzi ◽  
Ida De Michelis ◽  
Valentina Corradini ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Sodium Hydroxide ◽  
Calcium Hydroxide ◽  
State Of The Art ◽  
Zinc Content ◽  
Economic Viability ◽  
Acid Solutions ◽  
Physical Chemical ◽  
Galvanic Sludge ◽  
Valuable Metals

Typical methods for the treatment of waste pickling solutions include precipitation by alkaline reagents, most commonly calcium hydroxide. As a result, large volumes of galvanic sludge form, containing iron, calcium, sulphates, and a relatively small quantity of zinc (<20%), making Zn recovery not profitable. In summary, state-of-the-art Zn galvanization processes entail the loss of valuable metals and the irrational and expensive handling of spent pickling solutions (SPSs). The resulting conclusion is that there is room for a significant improvement in the way SPSs are treated, with the double goal of enhancing Zn galvanization methods’ economic viability and achieving a lesser impact on the environment’s processes. The experimental results show that it is possible to use SPS as a coagulant to treat the process wastewaters, kept separated, and added with sodium hydroxide. The results in obtaining precipitates with Zn contents higher than 40%, increasing the added advantage of making Zn recovery profitable. The results show the possibility of using SPS as a coagulant in the process of physical-chemical wastewater treatment and sodium hydroxide to obtain a precipitate with a zinc content of more than 40%.

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