Kinh doanh - Marketing
Kinh tế quản lý
Biểu mẫu - Văn bản
Tài chính - Ngân hàng
Công nghệ thông tin
Tiếng anh ngoại ngữ
Kĩ thuật công nghệ
Khoa học tự nhiên
Khoa học xã hội
Văn hóa nghệ thuật
Sức khỏe - Y tế
Văn bản luật
Nông Lâm Ngư
Kỹ năng mềm
Luận văn - Báo cáo
Giải trí - Thư giãn
Tài liệu phổ thông
Văn mẫu
Giới thiệu
Đăng ký
Đăng nhập
Tìm
Danh mục
Kinh doanh - Marketing
Kinh tế quản lý
Biểu mẫu - Văn bản
Tài chính - Ngân hàng
Công nghệ thông tin
Tiếng anh ngoại ngữ
Kĩ thuật công nghệ
Khoa học tự nhiên
Khoa học xã hội
Văn hóa nghệ thuật
Y tế sức khỏe
Văn bản luật
Nông lâm ngư
Kĩ năng mềm
Luận văn - Báo cáo
Giải trí - Thư giãn
Tài liệu phổ thông
Văn mẫu
Thông tin
Điều khoản sử dụng
Quy định bảo mật
Quy chế hoạt động
Chính sách bản quyền
Giới thiệu
Đăng ký
Đăng nhập
0
Trang chủ
Khoa Học Tự Nhiên
Hoá học
Study on the use of acidophilic iron oxidizing bacteria for dissolving iron from low-graded chalcopyrite ores
Đang chuẩn bị liên kết để tải về tài liệu:
Study on the use of acidophilic iron oxidizing bacteria for dissolving iron from low-graded chalcopyrite ores
Thúy Phượng
71
8
pdf
Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
In this study, two iron oxidizing bacterial strains Acidithiobacillus sp. IOB1 and Leptospirillum sp. IOB2 originated from mining sites in Vietnam were used in laboratory leaching experiments for the recovering minerals from low-graded chalcopyrite ores. | Journal of Science and Technology 54 (4A) (2016) 164-171 STUDY ON THE USE OF ACIDOPHILIC IRON OXIDIZING BACTERIA FOR DISSOLVING IRON FROM LOW-GRADED CHALCOPYRITE ORES Nguyen Van Hung, Dinh Thuy Hang* Institute of Microbiology and Biotechnology, E2 Building, 144 Xuan Thuy, Cau Giay, Hanoi * Email: dthang@vnu.edu.vn; dthangimbt@gmail.com Received: 15 August 2016; Accepted for publication: 6 October 2016 ABSTRACT Biomining is a microbiological-based approach to extract minerals from ores without adding acids and other extraction chemicals. Having biological nature, the process is considered environmental friendly and tends to be applied more widely nowadays, especially for lowgraded ores, for which chemical extraction is no longer efficient. In this study, two iron oxidizing bacterial strains Acidithiobacillus sp. IOB1 and Leptospirillum sp. IOB2 originated from mining sites in Vietnam were used in laboratory leaching experiments for the recovering minerals from low-graded chalcopyrite ores. The obtained results showed that both strains could significantly accelerate the leaching process, the highest iron dissolution rate was estimated for 0.83 g kg 1 d 1 within two weeks of incubation with strain IOB2, about 30 % and 50 % respectively higher than leaching with strain IOB1 or control without bacteria, respectively. The iron extraction from ores was also evidenced by EDX analyses comparing the ore particles before and after incubation with the bacteria. Microscopic observation of DAPI-stained ore particles also showed high cell density attached to the particles, instead of freely moving in the liquid extract. Furthermore, FISH analyses using a specific probe for the -Proteobacteria GAM42a revealed that only 50 % of DAPI-stained cells were Acidithiobacillus sp. IOB1 – like in the leaching experiment with this train as starting culture, indicating that other bacterial species have developed and contributed to the metal dissolution here; however very rare positive .
TÀI LIỆU LIÊN QUAN
Comparative study of resource use productivity and resource use efficiency of Kharif Vis-a-Vis rabi onion in Ahmednagar district of Maharashtra, India
Inventory and mapping of land resources for land use planning through detail soil survey coupled with remote sensing and GIS techniques: A case study in Nagenahalli Watershed, Doddaballapur Taluk, Bangalore Rural district, India
English vocabulary in use_ Elementary
Maternal post-natal tobacco use and current parental tobacco use is associated with higher body mass index in children and adolescents: An international crosssectional study
Renewable energy towards a sustainable power supply in the Nigerian power industry: covenant university as a case study
A study on resource use efficiency of production and marketing of chickpea in Banda district of bundelkhand zone in Uttar Pradesh, India
Patients admitted to treatment for substance use disorder in Norway: A population-based case–control study of socio-demographic correlates and comparative analyses across substance use disorders
Urban Transportation, Land Use, and Urban Transportation, Land Use, and the Environment in Latin America: the Environment in Latin America: A Case Study Approach A Case Study Approach
A quantum chemical study on the use of complexes between Hg(II) ions and fluorescent ligands for detection of cysteine
Doctoral thesis summary: Factors affecting individual customers in accepting Mobile Banking services in Vietnam: A study from Unified of Acceptance and Use of Technology model (UTAUT)
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.