National Academy of Sciences of the Republic of Armenia
ՀԱՅ  ENG  РУС
Home academy [@] sci.am Facebook Page
General Page About Academy Divisions Organizations Members Contact us
Yervant Zorian
Dr., Professor
COVID-19
Structure
Presidium Members
Documents
Innovation Proposals
Publications
Funds
Conferences
Competitions
Photogallery
Videogallery
Web Resources
Other Academies
"Gitutyun" newspaper
"In the World of Science" Journal
Publications in Press
Notices
Anniversaries
Universities
News
Scientific Results
Diaspora Department presents
Young Scientist Tribune
Our Honored Figures
Announcements
Lindau Nobel Laureate Meeting
Sitemap
Scientific Results
06/05/2022
Possibilities of microbiological bioleaching of Kajaran ore have been investigated at the Scientific and Production Center "Armbiotechnology" of NAS RA

At the SPC "Armbiotechnology" of NAS RA, the possibilities of microbiological bioleaching of low-grade porphyry copper (0.63-0.77%) ore of the Kajaran copper-molybdenum mine and the efficiency of the copper bioextraction process have been studied.

The research was carried out within the framework of the topic "Obtaining, study and application of bacterial consortia in the effective processes of copper and other precious metals bioextraction from primary and  secondary raw materials" under the supervision of Narine Vardanyan, the Head of the Laboratory of Metal Bioleaching, Doctor of Biological Sciences.

"Along with the depletion of rich copper world resources, the interest in poor ores with low copper content (0.2-2.0%) is growing. Microbiological bioleaching is beneficial for the mentioned ores and safe for the environment. This method is the most promising for poor ores, ore-tailings, the processing of which is not profitable while using the traditional pyrometallurgical method and poses a great danger to the environment," said Narine Vardanyan.

The modern highly efficient, environmentally friendly method of bioleaching for metal extraction has not been used in Armenia yet. In this purpose, research has been carried out to study the diversity of metals degrading bacteria, their dissemination in the biotopes of copper ores in Armenia and Artsakh.

"Metals degrading bacteria have been isolated from Kajaran ores in Armenia and Kashen ores in Artsakh. The physiological properties of the isolated bacteria, their resistance to heavy metals, and their ability to degrade sulfide minerals have been studied. The influence of physicochemical and technological factors on the process of bioextraction of copper by isolated bacteria and their communities has been studied as well.

The results of the mineralogical studies of bioleaching residues have revealed the mechanism of ore degradation. "Based on the data obtained, the scientific basis of the bioleaching process from Kajaran ore has been developed, a rich collection of metal degrading bacteria and a database have been created, allowing to develop effective, stable bacterial communities on the base of the most efficient strains for the processing of exact specific mineral ores," said Narine Vardanyan.

The scientific work was carried out within the framework of the basic funding of the  Center. The results were published in two book chapters (9, 10) published by Springer and in 8 scientific articles published in peer-reviewed journals listed in the Web of Science database.

The research was highly evaluated by the RA Science Committee. Narine Vardanyan and Arevik Vardanyan, a  Senior Researcher, Candidate of Biological Sciences, were recognized in 2021 as highly efficient researchers involved in scientific topics.

The scientific research aroused great interest among German colleagues. At their invitation, Narine Vardanyan and Anna Khachatryan, a Researcher of the Center, were sent on a business trip to the Martin-Luther University of Halle-Wittenberg in Germany in 2021. For two months, studies on bioleaching of copper ore were carried out in the Department of Biotechnology of the Faculty of Natural Sciences of the University, at the Institute of Microbiology, and at the Institute of Geology, jointly with Dr. Sabine Wilcher. The possibilities of further cooperation between the University of Halle-Wittenberg and the Laboratory of Metal Bioleaching of the Center were discussed with the German partners.

At the initiative of the Chinese side, a program on the exchange of scientific results and joint research was approved in 2021 between the Institute of Oceanography of the Chinese Academy of Sciences and the SPC "Armbiotechnology" of NAS RA, titled "Study of the processes of bioleaching of non-ferrous metals from metallurgical slags and regeneration of biosolutions through the microorganisms, their communities and immobilized forms".


Notices








On the 21st of February, 2024, The Institute of Language named after H. Acharyan of the National Academy of Sciences of the Republic of Armenia invites you to participate in the international conference "Current Problems of Studying and Teaching the Armenian Language". The conference will take place at the Institute of Language

Ս.թ. փետրվարի 23-ին ժ. 15:00-ին ՀՀ ԳԱԱ նիստերի դահլիճում (Բաղրամյան պող., 24) տեղի կունենա «Չընդհատված ծածկագիր. հայեր» գիտական ֆիլմի ցուցադրությունը և քննարկումը

The Shirak Center for Armenological Studies of NAS RA is starting to publish the 1 (27) volume of the "Scientific Works" journal for 2024. Priority is given to articles in English and Russian. The deadline for receiving articles is March 1, 2024

Международный инновационный центр нанотехнологий СНГ (МИЦНТ СНГ) при поддержке Межгосударственного фонда гуманитарного сотрудничества государств - участников СНГ (МФГС) и Объединенного института ядерных исследований объявляет о проведении конкурса на соискание грантов на разработку проектов в рамках деятельности МИЦНТ СНГ в 2024 году и очередной Стажировки молодых ученых и специалистов стран СНГ в Дубне в апреле - мае 2024года

The international conference "Armenia as a Civilizational Crossroad: Historical and Cultural Ties" is scheduled to take place from March 28 to 30, 2024, organized by the National Academy of Sciences of the Republic of Armenia and Yerevan State University

ՀՀ գիտության և տեխնիկայի զարգացման 2020-2024թթ. գերակայության ՀՀ կառավարության որոշման նախագիծ

Publications in Press
20/02/2024

«Գիտուժի» ներկայացուցիչների հետ քննարկվել են գիտահետազոտական ոլորտում պետական պատվերների ձևակերպման հարցեր
1lurer.am
19/02/2024

Երբ գիտության մեջ ես, շարժման մեջ ես. Լուսինե Համբարյան
ankakh.com
19/02/2024

Սևանի ձկնային պաշարները վտանգված են. իշխանի 2 տեսակ արհեստական պայմաններում է բազմացվում
1lurer.am
16/02/2024

Հայաստանը ես եմ. Նարինե Հայրապետյան
1tv.am
This site has been visited
6 848 018

times since 01.01.2005
National Academy of Sciences of the Republic of Armenia
NAS RA Logo (black, blue)
Top Website last updated on:  17:17, 20/02/2024 Top
General Page - About Academy - Divisions - Organizations - Members - Contact us - Structure - COVID-19
Presidium Members - Documents - Innovation Proposals - Publications - Funds - Conferences - Competitions
Photogallery - Videogallery - Web Resources - Other Academies - "Gitutyun" newspaper - "In the World of Science" Journal - Publications in Press
Notices - Anniversaries - Universities - News - Scientific Results - Diaspora Department presents - Young Scientist Tribune
Our Honored Figures - Announcements - Lindau Nobel Laureate Meeting - Sitemap
© Copyright 1998-2024 All Rights Reserved.
Website is created and supported by Academical Scientific Research Computer Network of Armenia (ASNET-AM)
For any suggestions write to webmaster {[ at ]} sci.am