KEYWORDS
Arsenopyrite oxidation • Bioleaching • Biohydrometallurgy • Pyrite oxidation • Refractory gold ores • Thiobacillus ferrooxidans
ABSTRACT
Abstract Much recent work in the field of biohydrometallurgy has been directed to the study of bio-oxidation of gold ores by acidophilic iron and sulfur oxidizing microorganisms. This work has been done worldwide and has resulted in several pilot plant and commercial scale operations for gold ore bio-oxidation. Bioleaching of gold by metabolic products of microorganisms has received less attention, but also offers opportunities for industrial application, especially if future regulations restrict the use of cyanide. This paper reviews recent progress in the use of microorganisms tooxidize the sulfidic matrix in refractory gold ores (bio-oxidation) and to solubilize elemental gold (bioleaching).
Показват се публикациите с етикет Gold. Показване на всички публикации
Показват се публикациите с етикет Gold. Показване на всички публикации
четвъртък, 22 април 2010 г.
вторник, 20 април 2010 г.
Ban on the use of cyanide mining technologies in the EU
Click the title to watch it in live on 21.04.2010 from 21:00 - 24:00
Кликнете заглавието за да гледате на живо дебата от 22:00 българско време - нищо, че няма такова време.
Кликнете заглавието за да гледате на живо дебата от 22:00 българско време - нищо, че няма такова време.
понеделник, 12 април 2010 г.
Corruption, Корупция, Gold, Злато, Mongolia, България
Открийте приликите!
"The court system is totally, unbelievably corrupt," Mr. Karlsen said.
"The judges get bribed.
There is no ability to execute judgments."
"Private companies are handing bribes to government officials"
"We are setting up a working group to look at the tax environment, so foreigners feel more comfortable," Prime Minister said in an interview
"But environmental advocates fear that Mongolia is becoming too miner-friendly."
"Seeing Mr. Friedland in Mongolia
worries many environmental advocates.
A man with American and Canadian passports
who lives in Singapore,
Mr. Friedland first came to international attention in 1992
when cyanide-laced tailings
washed out of the abandoned Summitville gold mine in Colorado,
killing all aquatic life in the Alamosa River for 17 miles downstream.
In the late 1980's, the mine was operated by Galactic Resources of Vancouver, and Mr. Friedland was Galactic's principal shareholder."
"A decade ago, the government set aside about one-eighth of the country as strictly protected.
"But now there is a lot of talk in the legislature of de-gazetting protected areas,"
"The court system is totally, unbelievably corrupt," Mr. Karlsen said.
"The judges get bribed.
There is no ability to execute judgments."
"Private companies are handing bribes to government officials"
"We are setting up a working group to look at the tax environment, so foreigners feel more comfortable," Prime Minister said in an interview
"But environmental advocates fear that Mongolia is becoming too miner-friendly."
"Seeing Mr. Friedland in Mongolia
worries many environmental advocates.
A man with American and Canadian passports
who lives in Singapore,
Mr. Friedland first came to international attention in 1992
when cyanide-laced tailings
washed out of the abandoned Summitville gold mine in Colorado,
killing all aquatic life in the Alamosa River for 17 miles downstream.
In the late 1980's, the mine was operated by Galactic Resources of Vancouver, and Mr. Friedland was Galactic's principal shareholder."
"A decade ago, the government set aside about one-eighth of the country as strictly protected.
"But now there is a lot of talk in the legislature of de-gazetting protected areas,"
Combination of corruption, political instability and reserves of gold, leading Mongolia to ...
Mining hordes invade Mongolia
In the city's Grand Khaan Irish Pub – suited diplomats and investment bankers rubbing shoulders with rough-necked mining engineers and their suspiciously pretty local "girlfriends".
You can read hall article of
Peter Foster in Ulan Bator
Published: 10:01PM BST 11 Apr 2010
clicking the title,
but the rest of the story
will be available in a few years
A story of "sustainable use" of natural resources
A story of "sustainable development"
The "story" will be written by
the mixture of now days "warriors" - "suited diplomats and investment bankers"
and the available corruption
In the city's Grand Khaan Irish Pub – suited diplomats and investment bankers rubbing shoulders with rough-necked mining engineers and their suspiciously pretty local "girlfriends".
You can read hall article of
Peter Foster in Ulan Bator
Published: 10:01PM BST 11 Apr 2010
clicking the title,
but the rest of the story
will be available in a few years
A story of "sustainable use" of natural resources
A story of "sustainable development"
The "story" will be written by
the mixture of now days "warriors" - "suited diplomats and investment bankers"
and the available corruption
четвъртък, 7 януари 2010 г.
Gold fever in Europe
Gold fever in Europe
Written by Zsolt Boda
Wednesday, 04 November 2009
It was almost ten years ago that cyanide-laced effluent from a settling plant at Baia Mare in Romania entered the Tisza river, causing devastation. Fishing and tourism in the region came to a standstill in the years that followed.
Click the title to read the article
Written by Zsolt Boda
Wednesday, 04 November 2009
It was almost ten years ago that cyanide-laced effluent from a settling plant at Baia Mare in Romania entered the Tisza river, causing devastation. Fishing and tourism in the region came to a standstill in the years that followed.
Click the title to read the article
Абонамент за:
Публикации (Atom)