نتایج جستجو برای: copper lead zinc ore treatment

تعداد نتایج: 1824801  

A Shafaati AA Behfar B Jannat H Komeilizadeh MR Oveisi N Sadeghi

Determination of trace elements in food is of great importance, as some of them have nutritional significance, whilst others are toxic. Long-term exposure to low levels of toxic metals could be important, especially in relation to children. Differential Pulse Anodic Stripping Voltammetry (DPASV) is applied to simultaneous determination of lead, cadmium, copper and zinc in dry ash infant formula...

2017
Ali M. Ahmed Dalia M. Hamed Nagwa T. Elsharawy

AIM The main objectives of this study were for comparing the effect of batteries and deep litter rearing systems of domesticated Japanese quail, Coturnix coturnix japonica, on the concentration levels of cadmium, copper, lead, and zinc from the quail meat and offal in Ismailia, Egypt. MATERIALS AND METHODS A total of 40 quail meat and their offal samples were randomly collected from two main ...

Journal: :international journal of advanced biological and biomedical research 2013
m. daylam-jafarabad d. azadfar m.h. arzanesh

heavy metals found in urban air with its toxic effects have a direct impact on human health. selection of appropriate tree species and shrub refining capacity of heavy metals in urban areas can greatly reduce the toxic effects of these materials. this study aimed to identify the most suitable tree and shrub species of broadleaf evergreen, deciduous and coniferous refinement of heavy metals lead...

Journal: :International journal of the Society of Materials Engineering for Resources 2022

A pre-treatment method for upgrading gold from a polymetallic gold-zinc-lead ore by flotation was studied. X-ray diffraction analysis of the sulfide showed that quartz, calcite, pyrite, sphalerite, and galena are main constituents ore. The composition contained 6.49 ppm Au, 3.48% Zn, 1.25% Pb, 17.98% Fe, 20.36% S. Due to complexity ore, recovery is generally low. objective this study develop pr...

Journal: :Conservar Património 2023

This study presents an analytical investigation and electrochemical conservation treatment for a group of four copper alloy artifacts excavated from the archaeological cemetery that was located on site Queen Alia International Airport, Jordan. The chemical analyses internal alloys showed bracelet spatula were made quaternary copper–zinc–tin–lead alloy, copper–silver–zinc copper–tin, bronze allo...

2013
Junko Kaminiwa Katsuya Honda Akira Kurosu Takeki Nishi Yukiko Sugano Shizue Yano

This study was to determine the feasibility of using potentiometric stripping analysis (PSA) to measure serum levels of copper, lead, and zinc in elderly subjects with metabolic disorders (hyperglycemia, hypertriglyceridemia, and hypercholesterolemia). Furthermore, we investigated the relationship between serum trace elements and lipid and glucose levels in these patients. There was a strong co...

Journal: :Aquatic toxicology 2003
S Nayar B P L Goh L M Chou S Reddy

Ponggol estuary, located on the northeastern coast of Singapore, is heavily impacted by reclamation, dredging, construction and shipping. Tin, lead, nickel, cadmium, copper and zinc in the particulate and dissolved fraction and in sediments were monitored biweekly in the estuary from July 1999 to June 2000. The concentrations of tin, lead, nickel, cadmium, copper and zinc were observed to range...

2016
Jieun Baek Yosoon Choi

This study proposes a new method to quantitatively represent the uncertainty existing in open pit optimization results due to variations in mineral prices. After generating multiple mineral prices using Monte Carlo simulation with data on past mineral prices, a probability model that represents the uncertainty was developed by integrating multiple open pit optimization results derived from the ...

Journal: :Archives of disease in childhood 1985
M Van Caillie-Bertrand H J Degenhart I Luijendijk J Bouquet M Sinaasappel

Serum copper and zinc concentrations and 24 hour urinary copper and zinc excretion were determined serially from the beginning of treatment with D-penicillamine in four children with Wilson's disease. The data show a progressive decrease in both serum copper and zinc concentrations in all. Urinary copper excretion gradually levelled off to approximately 50% of initial values, but zinc excretion...

Leaching of a low-grade lead and zinc oxide ore was studied by an organic reagent, citric acid. The quadratic mathematical models were developed for the relationship among the influential parameters and lead and zinc recoveries. Leaching rate was strongly affected by the interactive effects of factors. It was also found that the quadratic effects of stirring speed and linear<e...

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