Influencing Factors and Mechanism of Cobalt Redissolution from Zinc Sulphate Solution

2011 ◽  
Vol 402 ◽  
pp. 12-16 ◽  
Author(s):  
Gui Sheng Zeng ◽  
Ming Jing Li ◽  
Yu Xie
Keyword(s):  
Particle Size ◽  
Influencing Factors ◽  
Zinc Sulphate ◽  
Zinc Dust ◽  
Copper Ion ◽  
Sulphate Solution ◽  
Detention Time ◽  
Large Particles ◽  
Zinc Sulphate Solution

Redissolution of cemented cobalt from zinc sulphate solution occurs, and is a well known problem among zinc producers. A variety of mechanism of cobalt redisisolution have been proposed in the literatures, however, it is still not very well understood. The influencing factors of cobalt redissolution such as detention time, oxidation, particle size of zinc dust and copper ion have been investigated in this paper. The redissolution does not occur when very large particles are used but the redissolution of cobalt is significant from small zinc particles. The redissolution is obvious with copper ion added, while the redissolution is not occurred from the zinc sulphated solution without copper ion added. The redissolution mechanism of cobalt is obtained.

scholarly journals Homing behaviour of pigeons subjected to unilateral zinc sulphate treatment of their olfactory mucosa

1996 ◽  
Vol 199 (11) ◽  
pp. 2531-2535 ◽  
Author(s):  
S Benvenuti ◽  
A Gagliardo
Keyword(s):  
Brain Damage ◽  
Zinc Sulphate ◽  
Experimental Treatment ◽  
Olfactory Mucosa ◽  
Initial Orientation ◽  
Sulphate Solution ◽  
Control Groups ◽  
Homing Behaviour ◽  
Homing Performance ◽  
Zinc Sulphate Solution

Pigeons were made anosmic by unilateral treatment of their olfactory mucosa with a zinc sulphate solution and by plugging the contralateral nostril. In a series of releases at unfamiliar sites, 55­79 km from the home loft, the experimental birds' homing behaviour was compared with that of two control groups: unmanipulated control birds, and birds subjected to unilateral zinc sulphate treatment and equipped with an ipsilateral nasal plug. The experimental pigeons exhibited homing behaviour ­ in terms of both homeward initial orientation and homing performance ­ significantly poorer than that of both unmanipulated and treated control pigeons. In addition, the homing behaviour of the treated controls turned out to be only slightly, and not significantly, poorer than that of the unmanipulated birds. The results show that the impaired homing capabilities of the zinc-sulphate-treated birds are due to the lack of navigational information and not to non-specific brain damage caused by the experimental treatment.

scholarly journals Sodium dithionite as a selective demasking agent for the complexometric determination of thallium

2005 ◽  
Vol 70 (11) ◽  
pp. 1357-1362 ◽  
Author(s):  
Prakash Shetty ◽  
Nityananda Shetty
Keyword(s):  
Metal Ions ◽  
Relative Error ◽  
Coefficient Of Variation ◽  
Zinc Sulphate ◽  
Xylenol Orange ◽  
Sodium Dithionite ◽  
Sulphate Solution ◽  
Complexometric Determination ◽  
Zinc Sulphate Solution

Sodium dithionite is proposed as a new demasking agent for the rapid and selective complexometric determination of thallium(III). In the presence of diverse metal ions, thallium (III) was first complexed with excess EDTA and the surplus EDTA was then titrated with a standard zinc sulphate solution at pH 5-6 (hexamine buffer) using Xylenol Orange as the indicator. The EDTA equivalent to thallium was then released selectively with sodium dithionite and back titrated with a standard zinc sulphate solution as before. Reproducible and accurate results were obtained in the range 4-100 mg of thallium with a relative error of +-27 % and a coefficient of variation (n = 6) of not more than 0.30 %. The effects of various diverse ions were studied. The method was applied to the determination of thallium in its complexes and in alloys.

Zinc sulphate solution enema decreases inflammation in experimental colitis in rats

1999 ◽  
Vol 14 (11) ◽  
pp. 1088-1092 ◽  
Author(s):  
Bao‐Wen Chen ◽  
Hua‐Hong Wang ◽  
Jian‐Xiang Liu ◽  
Xin‐Guang Liu
Keyword(s):  
Zinc Sulphate ◽  
Experimental Colitis ◽  
Sulphate Solution ◽  
Zinc Sulphate Solution
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