Effects of partial acidulation on chemical and mineralogical characteristics of residual phosphate rocks

1994 ◽  
Vol 39 (3) ◽  
pp. 179-187 ◽  
Author(s):  
L. M. Condron ◽  
H. J. Di ◽  
A. S. Campbell ◽  
K. M. Goh ◽  
R. Harrison
Keyword(s):  
Phosphate Rocks ◽  
Partial Acidulation ◽  
Mineralogical Characteristics

Phosphorus availability from partial acidulation of two phosphate rocks

1980 ◽  
Vol 1 (1) ◽  
pp. 37-49 ◽  
Author(s):  
L. L. Hammond ◽  
S. H. Chien ◽  
J. R. Polo
Keyword(s):  
Phosphorus Availability ◽  
Phosphate Rocks ◽  
Partial Acidulation

scholarly journals Mineralogical and Geochemical Characterization of Gold Mining Tailings and Their Potential to Generate Acid Mine Drainage (Minas Gerais, Brazil)

Minerals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 39
Author(s):  
Mariana Lemos ◽  
Teresa Valente ◽  
Paula Marinho Reis ◽  
Rita Fonseca ◽  
Itamar Delbem ◽  
...  
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Minas Gerais ◽  
Acid Mine ◽  
Fine Grain ◽  
Mineralogical Characteristics ◽  
Tailing Dams ◽  
The One ◽  
And Control

For more than 30 years, sulfide gold ores were treated in metallurgic plants located in Nova Lima, Minas Gerais, Brazil, and accumulated in the Cocoruto tailings dam. Both flotation and leaching tailings from a deactivated circuit, as well as roasted and leaching tailings from an ongoing plant, were studied for their acid mine drainage potential and elements’ mobility. Detailed characterization of both tailings types indicates the presence of fine-grain size material hosting substantial amounts of sulfides that exhibit distinct geochemical and mineralogical characteristics. The samples from the ongoing plant show high grades of Fe in the form of oxides, cyanide, and sulfates. Differently, samples from the old circuit shave higher average concentrations of Al (0.88%), Ca (2.4%), Mg (0.96%), and Mn (0.17%), present as silicates and carbonates. These samples also show relics of preserved sulfides, such as pyrite and pyrrhotite. Concentrations of Zn, Cu, Au, and As are higher in the tailings of the ongoing circuit, while Cr and Hg stand out in the tailings of the deactivated circuit. Although the obtained results show that the sulfide wastes do not tend to generate acid mine drainage, leaching tests indicate the possibility of mobilization of toxic elements, namely As and Mn in the old circuit, and Sb, As, Fe, Ni, and Se in the tailings of the plant that still works. This work highlights the need for proper management and control of tailing dams even in alkaline drainage environments such as the one of the Cocoruto dam. Furthermore, strong knowledge of the tailings’ dynamics in terms of geochemistry and mineralogy would be pivotal to support long-term decisions on wastes management and disposal.

Mineralogical characteristics of soil dust from source regions in northern China

Particuology ◽  
2009 ◽  
Vol 7 (6) ◽  
pp. 507-512 ◽  
Author(s):  
Zhenxing Shen ◽  
Sandrine Caquineau ◽  
Junji Cao ◽  
Xiaoye Zhang ◽  
Yuemei Han ◽  
...  
Keyword(s):  
Northern China ◽  
Soil Dust ◽  
Source Regions ◽  
Mineralogical Characteristics
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