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2.1.2. Preparation of stabilization material. The amFe@Mont was synthesized by an ultrasonic combined with co-precipitated method [33].Firstly, the Mont was grinded to 100 mesh, and then the sieved Mont was dispersed in 0.2 mol/L Fe(NO 3) 3 solution with a liquid to solid ratio (L/S) of 100:1 (mL: g). The mixture was sonicated for 3 h, following …
The repeatability and accuracy of the method (standard recovery) were therefore suitable for the analysis of trace amounts of inorganic species of arsenic, antimony, and thallium in water samples. Validation parameters were comparable with literature data (12–14), but it should be stated that these other studies have used other …
and 98 pct, arsenic, elimination was between 60 and 93 pct, and antimony elimination was between 40 and 92 pct. The overall mass transfer coefficients for vacuum refining for the im- purities considered fell in the range of 5 " 10 5 to 2 x 10 -4 m s -1. The values were insensitive to small changes in melt temperature but decreased with ...
Nitrogen (N) shortage poses a great challenge to the implementation of in situ bioremediation practices in mining-contaminated sites. Diazotrophs can fix atmospheric N2 into a bioavailable form to plants and microorganisms inhabiting adverse habitats. Increasing numbers of studies mainly focused on the diazotrophic communities in the …
The study area was located in Qingxin County, Qingyuan City in southern China, along the southern slopes of the Nanling Range on the northern edge of the Pearl River Delta (Fig. 1).The region has a humid subtropical climate controlled by the East Asian monsoon, with an annual average sunshine of 1662.2 h, a temperature of approximately …
In this work, we propose a facile liquid-controlled strategy to prepare a self-template (Fe 2 O 3-MnFe 2 O 4) composite for antimony elimination. Through simple NH 3 ·H 2 O addition and Fe-Mn ratio proportion control, the composition and structure of Fe 2 O 3 -MnFe 2 O 4 are precisely regulated, which is substantiated by morphology variation ...
1. Introduction. Arsenic (As) and antimony (Sb) belonging to Group 15 in the periodic table are toxic metalloids and are classified as (suspected) carcinogens [1], [2].Chronic exposure or excessive ingestion of As and Sb can cause severe damage to human health [3], [2].Owing to the shared similar chemical properties, As and Sb are …
1. Introduction. Arsenic (As) and antimony (Sb) are commonly found as associated elements in the minerals of copper, lead, and zinc (Ding et al., 2021; Lum et al., 2023).Due to the significant volatility of their oxides, As and Sb tend to vaporize and become concentrated in the flue dust during the pyrometallurgical process (Aracena et …
This article is cited by 1 publications. G. A. Brooks, W. J. Rankin, N. B. Gray. Thermal separation of arsenic and antimony oxides.
It is apparent that the rate of dissolving antimony and arsenic from tetrahedrite ( Fig. 9) by the lixiviant increases steadily with increasing sodium sulphide concentra- tion, and the dissolution ...
Obviously, the progress of arsenic elimination is accompanied by the loss of antimony trioxide to the vapor at the higher filtration temperature. The volatile antimony trioxide having passed through the filter(I) would be collected by filter (II) after cooling and condensation, while the gaseous arsenic trioxide kept moving forward.
The overall elimination (smelting + converting) of bismuth and arsenic can be affected greatly by the level of oxygen enrichment, followed, in decreasing order, by that of antimony and lead, but ...
Arsenic (As) is a metalloid element with the atomic number 33. It only occurs naturally as a stable isotrope with an atomic mass of 75 ( 75 As) but has several different molecular forms (allotropes). Arsenic has complex chemical properties and can form many different organic and inorganic compounds.
Co-contamination of soil with arsenic (As) and antimony (Sb) poses a serious risk to the environment and human health. This study used Fe-functionalized biochar (FBC) for the remediation of an As-Sb co-contaminated soil. The addition of FBC simultaneously decreased the bioavailability of As/Sb by facilitating the transformation of mobile As and ...
Jarosite can be an important scavenger for arsenic (As) and antimony (Sb) in acid mine drainage (AMD) and acid sulfate soil (ASS) environments. When subjected to reducing conditions, jarosite may undergo reductive dissolution, thereby releasing As, Sb, and Fe2+ coincident with a rise in pH. These conditions can also trigger the Fe2+ …
Following the previous report on phase equilibria between Na2CO3-Na2O-SiO2 melts and liquid copper, the distribution equilibria of arsenic and antimony have been investigated at 1523 K to investigate the optimum conditions for removal of these detrimental elements from copper by use of soda flux. The obtained results were explained by the terms of oxygen …
Abstract. Arsenic, antimony, and bismuth are usually found in association with minerals of some other metals. These materials are toxic, and under restricted conditions they are used for medical ...
Following proton addition, the structure H-O-As + (CH 3) 3 reacts with hydride ion leading to elimination of H 2 O. The bottom line indicates the methylation of an As(III) structure with SAM [shown in abbreviated form as CH 3-S +-(C) 2]. ... Like arsenic, antimony is widely distributed on earth, usually at low concentrations, e.g., ...
1. Introduction. Arsenic (As) is a toxic metalloid in Group 15 of the periodic table. It can be leaked into the environment by natural geological processes and anthropogenic activities, such as mining (Matschullat, 2000) and smelting (Xiong et al., 2012), and it is widely distributed in minerals, soils, and fresh and marine waters …
The feasibility of a new method for separating arsenic from arsenic—antimony-bearing dusts using CuS was put forward, in which Sb was transformed into Sb 2 O 4 and Sb 2 S 3 that stayed in the roasted calcine while As was volatilized in the form of As 4 O 6.The factors such as roasting temperature and CuS …
Description. The Chemistry of Arsenic, Antimony and Bismuth is a 16-part book that discusses the composition, structure, and properties of arsenic, antimony, and bismuth. The book is the 21st chapter of the second volume of a series. The first part in this book describes the elements featured, and then discusses the importance of their alloys ...
1 g/l standard solution of arsenic, antimony, iron, chromium and nickel ions. In these solutions a certain amount of blank was added, corresponding to the concentration in ... Ni, Fe and effectively elimination the strong matrix influence on analytes spectral line (see spectrum 3). Average analysis results of 11 certified reference materials ...
Higher toxic element concentrations include arsenic, antimony, and lead of which 80, 28, and 13.3% of samples had concentrations higher than WHO guidelines, respectively. ... To ensure the elimination of atmospheric contamination and to minimize the fluctuations in space and time, on-site measurements of the electrical conductivity …
In the case of arsenic, an increase in metal depletion from the aqueous solution will be achieved with further decreasing the solution/carbon ratio; it is expected that also the elimination of antimony will be enhanced. Antimony and arsenic loadings were compared with other values in Table 1. Qualitative speaking, it can be seen that …
Altmetric. Listen. Reviews. Stabilization and encapsulation of arsenic-/antimony-bearing mine waste: Overview and outlook of …
Determination of oxoanions and water-soluble species of arsenic, selenium, antimony, vanadium, and chromium eluted in water from airborne fine particles (PM 2.5): effect of acid and transition metal content of particles on heavy metal elution M. Taira, K. Sakakibara, K. Saeki, S. Ohira and K. Toda, Environ. Sci.:
Efficiency values increased till 300 A⋅m − 2 but, thereafter it remained nearly unaffected. In another investigation on electro-deposition of antimony from its complex salt of antimony/copper ...
Abstract. Arsenic, Antimony, and Bismuth are members of Group V of the Periodic Table of Elements. These elements have been used for a variety of medicinal and pest control purposes over a number of centuries. They have also been used in metallic alloys and in the production of III–V semiconductors to increase electronic speeds of …
1. Introduction. Antimony (Sb) and arsenic (As), which belong to Group 15 in periodic table, often lead to metal contamination in soils, sediments, and groundwater due to natural processes and/or anthropogenic activities (Hiller et al., 2012; Li et al., 2021a; Yong et al., 2021).Antimony and As have been identified as priority pollutants of interest …
Arsenic and antimony in water and wastewater: overview of removal techniques with special reference to latest advances in adsorption. J Environ Manage. …
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