The chemical composition and nickel, cobalt, copper, zinc and lead contents of Nanao Bay sediments

1977 ◽  
Vol 33 (5) ◽  
pp. 242-246 ◽  
Author(s):  
Yoshikazu Yamamoto ◽  
Yukitaka Tanaka ◽  
Shunzo Ueda
Keyword(s):  
Chemical Composition ◽  
Nickel Cobalt ◽  
Copper Zinc ◽  
Cobalt Copper

Water Quality of Lake Iskanderkul and Its Tributaries

2020 ◽  
Vol 6 (2) ◽  
pp. 79-88
Author(s):  
Z.O. Normakhmedova ◽  
◽  
A.V. Mitusov
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Chemical Composition ◽  
Fish Farming ◽  
Natural Phenomena ◽  
Change Dynamics ◽  
Chemical Composition Of Water ◽  
Study Results ◽  
Copper Zinc

This article presents the study results of the change dynamics in the chemical composition of water in Lake Iskanderkul and the rivers flowing into it, as well as the comparison of water quality in the water bodies of the Iskanderkul Basin and several mid-stream tributaries of the Zarafshan River. It was established that the chemical composition of water in Lake Iskanderkul and its tributaries meets the requirements of the corresponding state standard (GOST 2874-82 “Drinking Water”). However, in terms of dissolved oxygen, copper, zinc, lead and iron the water in Lake Iskanderkul does not satisfy fish farming requirements. The main water pollution sources in the area include such natural phenomena as floods, avalanches, mudslides, and rock dissolution.

Concentration of Certain Trace Elements in the Soils of Dagestan Lowlands and Its Medical and Ecological Significance

2021 ◽  
pp. 69-76
Author(s):  
Patimat M. Ibnumaskhudova ◽  
◽  
Patimat D. Kazanbieva ◽  
Umiyat A. Magomedova ◽  
Khadizhat N. Abdurazakova ◽  
...  
Keyword(s):  
Trace Elements ◽  
Trace Element Composition ◽  
Economic Problem ◽  
Research Centre ◽  
Morbidity Rate ◽  
State Budget ◽  
Number Of Patients ◽  
Copper Zinc ◽  
The Republic ◽  
Cobalt Copper

Neurological and endocrine diseases, being widespread and producing significant impact on peopleʼs health as well as increasing the risk of disability of the working population (thus burdening the state budget), remain a most important medical and economic problem today. The study aimed to establish a link between these pathologies and the content of trace elements (cobalt, copper, zinc and manganese) in the soils of Dagestan plains. The concentration of active forms of cobalt, copper, zinc and manganese in the soil was established using the atomic absorption spectrophotometer model 170-70 (Hitachi, Japan) at the Biogeochemistry Laboratory of the Caspian Institute of Biological Resources, Dagestan Federal Research Centre, Russian Academy of Sciences. To determine the morbidity rate in the population, we turned to the data of the Ministry of Health of the Republic of Dagestan. The study revealed that the relevant pathologies in Dagestanʼs population, leading to disability, are caused by the trace element composition of the soil. Having compared the data on the content of cobalt, copper, zinc and manganese in the soils of the republicʼs lowland districts (Kizilyurt, Khasavyurt, Babayurt) and the prevalence of endocrine and neurological pathologies, we found a high correlation. The number of patients was in direct proportion to the content of manganese and in inverse proportion to the content of cobalt, copper and zinc. However, in Kizlyar District endocrine pathologies only correlated with zinc in the soil, which, apparently, can be explained by the local diet, fish products playing an important role, and by the fact that the territory is often flooded with coastal waters, changing the elementsʼ concentration in the soil.

Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders

2018 ◽  
Vol 165 (11) ◽  
pp. D511-D517
Author(s):  
Miroslav Spasojević ◽  
Milica Spasojević ◽  
Pavle Mašković ◽  
Dušan Marković ◽  
Lenka Ribić-Zelenović
Keyword(s):  
Magnetic Properties ◽  
Copper Alloy ◽  
Nickel Cobalt ◽  
Microstructure And Magnetic Properties ◽  
Cobalt Copper

Investigation of Bioleaching of a Low Grade Nickel-Cobalt-Copper Sulfide Ore with High Magnesium as Olivine and Serpentine from Lao

2013 ◽  
Vol 825 ◽  
pp. 396-400 ◽  
Author(s):  
Bo Wei Chen ◽  
Liu Lu Cai ◽  
Biao Wu ◽  
Xue Liu ◽  
Jian Kang Wen
Keyword(s):  
Copper Sulfide ◽  
Nickel Sulfide ◽  
Low Grade ◽  
Nickel Cobalt ◽  
Nickel Silicate ◽  
Copper Leaching ◽  
Sulfide Ore ◽  
Initial Ph ◽  
Copper Sulfide Ore ◽  
Cobalt Copper

Shake flask bioleaching of a low-grade nickel-cobalt-copper sulfide ore from Lao was investigated to test the technical feasibility to recovery metals from this ore. The mineralogical results indicated that the valuable minerals were disseminated finely and the ore had a low content of sulfur and high content of iron and magnesium, which was very harmful for bioleaching. The effects of different parameters such as the amount of acid addition, inoculation volume, initial pH, temperature and leaching time on the bioleaching performance of the ore were evaluated after pre-leaching with dilute acid. The results showed that nickel, cobalt, copper leaching rates reached 81.61%, 80.75%, 70.97% at 33 °C and 83.40%, 82.13%, 70.34% at 45 °C. The mineralogical analysis of the leaching residues revealed that the leaching rate of nickel sulfide was more than 92% and the unleached nickel was mainly present as nickel silicate.

The determination of aluminum, nickel, cobalt, copper, and iron in alnico

1958 ◽  
Vol 18 ◽  
pp. 372-375 ◽  
Author(s):  
Donald H. Wilkins ◽  
Louise E. Hibbs
Keyword(s):  
Nickel Cobalt ◽  
Cobalt Copper
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