0086-21-58386256
A method for vitrification of arsenic and antimony, comprising substituting oxygen to sulfur on thiosalts, incorporating resulting sodium arsenate and sodium antimonate into a sodium silicate glass-forming mixture and vitrifying the sodium silicate glass-forming mixture into a resulting glass sequestering the arsenic and antimony.
The object of this invention is a method by which arsenic is removed from sulfuric acid solution, in which the sulfuric add concentration is at least 300 g/l, at a temperature of 50-105° C. by reducing the arsenic in the solution with the aid of sulfur dioxide. The arsenic trioxide produced is crystallized from the sulfuric acid solution by cooling.
How much Antimony is produced and released to the environment? In 1984, 64.5 million lbs. antimony ore was mined and refined. Production of the most commonly used antimony compound, the trioxide, increased during the 1980s to about 31 million lbs, reported in 1985.
Sep 15, 2017· The separation of arsenic and antimony trioxide was realized as follows. The high temperature effluent (＞750 °C) was first cooled to 500 ∼ 550 °C. The substances with low saturated vapor pressures first condensed as solid particles, and were intercepted by cyclone separator and filter(I).
Arsenic was recovered from the solution after selenium removal and the direct recovery was 79.4%, and the quality of As 2 O 3 product reached the third grade standard of arsenic trioxide (GB 26721-2011). This process realizes the efficient recovery of alkali, selenium and arsenic in arsenic-alkali residue, and also does not produce arsenic ...
Jul 05, 2021· The pyrometallurgical processes cause serious environmental pollution and low comprehensive recover rate of valuable metals, such as arsenic is readily volatilized as As 2 O 3 and collected in flue dust (Thornton et al., 2009).Therefore, in view of these disadvantages, arsenic and antimony is primarily removed by hydrometallurgical processes, such as sulfuric acid, alkaline …
Crude arsenic trioxide is relatively insoluble but may be converted to more soluble derivatives such as arsenious acid or sodium arsenite in some preparations. EPIDEMIOLOGY Arsenic trioxide is the major source of occupational exposure to arsenic compounds, especially from the processing of …
Anode slime is an important material of recycling precious metals. Up to now, treating the arsenic- and antimony-rich anode slime by conventional processes has the following problems: its economic and environmental effect is less than satisfactory, and the removal effect of arsenic and antimony from anode slime in present processes is not all that could be desired. Therefore, vacuum dynamic ...
Arsenic trioxide (ATO) and antimony (Sb) are well-known ubiquitous environmental contaminants and cause unpromising male reproductive effects in target and non-target exposed organisms. The main objective of this study was to investigate the effects of ATO or/and Sb on process of autophagy, apoptosis, and reproductive organ in adult mice.
Mar 23, 2013· Arsenic trioxide was recovered from the alkaline leachate by acid precipitation, at an optimal H 2 SO 4 /arsenic ratio of 1.9 mol/mol; after washing with diluted acid, the purity of arsenic trioxide reached 93.4 % and the total recovery ratio of arsenic was 79 %. This relatively simple process was found to be an effective method for arsenic ...
Most commercial grades of antimony trioxide contain between 99. 2% and 99.5% antimony trioxide with varying amounts of impurities such as arsenic, iron and lead. Commercial suppliers
A higher removal percentage of arsenic can reach 92.24% at the expense of 6 ∼ 7% loss of antimony in the two-step filtration process at 500 ∼ 550 °C and 300 ∼ 400 °C.
Jan 28, 2019· This report contains current information on the treatment technologies for wastes and environmental media containing arsenic. It summarizes information on 13 technologies used to treat arsenic, identifies sites and facilities where arsenic treatment has been used, and provides references to more detailed arsenic treatment information.
Dec 01, 1994· Experiments were carried out to remove arsenic from antimony trioxide by two techniques: first, by selectively volatilizing the more volatile arsenic trioxide from a mixed oxide sample; and, second, by selectively condensing the less volatile antimony tetroxide at high temperatures, leaving arsenic ...
appear that antimony leached from antimony-containing materials would be in the form of the antimony(V) oxo-anion, which is the less toxic form. The subchronic tox-icity of antimony trioxide is lower than that of potassium antimony tartrate, which is the most soluble form. Antimony trioxide, due to its low bioavailability, is genotoxic
Request PDF | Separation and recovery of arsenic and alkali products during the treatment of antimony smelting residues | For the comprehensive utilization of antimony smelting arsenic-alkali ...
Experiments were carried out to remove arsenic from antimony trioxide by two techniques: first, by selectively volatilizing the more volatile arsenic trioxide from a mixed oxide sample; and, second, by selectively condensing the less volatile antimony tetroxide at high temperatures, leaving arsenic trioxide to condense out at a lower temperature.
Sep 30, 2013· The removal of Sb(III) from waste water is achieved in batch system by using grey and red Erzurum (Oltu) clay which are cheap and natural adsorbents. Adsorption experiments were studied. For this purpose, various important parameters such as contact time, pH, and temperature were examined on the adsorption of Sb(III) ions onto grey and red Erzurum (Oltu) clay.
Toggle navigation. Home; About; Membership; Communities; Events; Education; Digital Content; About. About; ASM Milestones. Governance. Strategic Plan
May 24, 2018· Antimony-bearing dust, a byproduct of the lead-smelting process, is an important secondary resource of antimony. A clean production process for producing NaSb(OH)6 by oxidation in an NaOH solution has been proposed to solve the difficulties of recovering antimony from antimony-bearing dust. First, antimony trioxide in the dust was leached into a sodium hydroxide solution.
Sep 01, 2019· The results shown in Fig. 1 indicate that the arsenic and antimony are mainly in the form of arsenic trioxide and antimony tetroxide, respectively. The chemical composition of the sample was determined by Inductive Coupled Plasma (ICP) on Thermo iCAP 7200 ICP-AES, and the results are shown in Table 1 .
Jul 06, 2021· U.S. arsenic average price by type 2011-2018. This statistic shows the average price of arsenic in the United States from 2011 to 2018, by type. In 2018, the average price for arsenic metal ...
produce antimony metal or by re-volatilization to produce antimony trioxide (ATO).1,2 The latter is more attractive because ATO has a diverse application in industry and accounts for over 60% of overall global Sb consumption. However, the presence of arsenic oxide in CATO has a …
Nov 24, 2014· Light (sunlight, ultraviolet, simulated sunlight) irradiation was used to initiate the dissolution of antimony trioxide (Sb2O3). Dissolution rate of Sb2O3 was accelerated and dissolved trivalent antimony (Sb(III)) was oxidized in the irradiation of light. The photopromoted oxidative dissolution mechanism of Sb2O3 was studied through experiments investigating the effects of pH, …
Method and apparatus for the removal of arsenic compounds from an arsenic-containing material wherein the material is reacted with an oxygen carrier and a sulfur carrier under temperature conditions sufficiently high to convert the arsenic compounds to sulfides and the arsenic sulfides are thereupon condensed and deposited in solid form.
5.10.1 Antimony and arsenic stock standard solution (1,000 mg/L): Either procure certified aqueous standards from a supplier and verify by comparison with a second standard, or dissolve 1.197 g of antimony trioxide Sb 20 3 and 1.320 g of arsenic trioxide As 2O 3 in 100 mL of reagent water containing 4 g NaOH. Acidify the solution with 20 mL ...
Mar 29, 2011· Anode slime is an important material of recycling precious metals. Up to now, treating the arsenic- and antimony-rich anode slime by conventional processes has the following problems: its economic and environmental effect is less than satisfactory, and the removal effect of arsenic and antimony from anode slime in present processes is not all that could be desired. Therefore, vacuum …
Dec 01, 1994· An X-ray diffraction study of arsenic-trioxide and antimony-trioxide samples encapsulated under vacuum and then held at 395 C for 24 hours revealed that cubic arsenic trioxide dissolves into cubic antimony trioxide up to a limit between 12.9 and 19.0 wt pct As. It was also found that arsenic ...