Removal of Arsenic from Aqueous Solution by …
This article is cited by 50 publications. Luong H. V. Thanh and Jhy-Chern Liu . Flotation Separation of Soluble and Colloidal Indium from Aqueous Solution.
Recycle Gallium and Arsenic from GaAs-Based E-Wastes via …
This work proposed a novel method of pyrolysis and vacuum metallurgy to recycle gallium and arsenic from GaAs-based e-wastes, which may cause arsenic contamination and gallium waste if treated improperly. As a typical GaAs-based e-waste, the light-emitting diode (LED) was studied in this paper. Pure GaAs chips were first …
Separation methods applied to arsenic speciation
SPE have been widely used for arsenic speciation analysis. There are mainly two strategies for separation of arsenic species: (a) different arsenic species can be …
Speciation Analysis of Arsenic Compounds by HPLC …
The experimental results demonstrated that the excellent repeatability of retention time was achieved for separation of arsenic species via anion-exchange …
On site separation of inorganic forms of thallium and arsenic …
The use of SCX-3 allows for Tl(III) and SAX for As(III) separation, which are then quantitated in the effluent by ICP-MS. Determination of non-retained species was done after reduction of the sample volume to 2 mL (50-fold preconcentration), which allowed for detection of As concentrations <0.1 ppb and Tl <0.01 ppb. For As, a collision chamber ...
Separation of Arsenic from the Antimony-Bearing Dust …
A pyrometallurgical process of selective oxidation roasting of the antimony-bearing dust using CuO is put forward, in which the antimony component is oxidized to Sb2O4 staying in the roasted residue, and arsenic is volatilized in the form of As2O3. The addition of CuO has an active effect on the arsenic volatilization, because structures of …
Magnetic Separation of Hematite-Coated Fe3O4 Particles Used as Arsenic
The products of conventional and surfactant-assisted ball-. milling of magnetite powder were tested as potential arsenic. adsorbents able to be recovered by means of a low-field magnetic ...
A systematic study of arsenic adsorption and …
Arsenic (As) is one of the world's top 20 hazardous chemicals and it can be found in a variety of inorganic and organic forms. ... catalysis, wastewater treatment, …
Separation of arsenic species in aqueous solutions and
The HPLC separation of eight anionic, cationic or neutral arsenic species (arsenite, arsenate, monomethylarsonic acid, dimethylarsinic acid, arsenobetaine, arsenocholine, trimethylarsine oxide and ...
Separation and determination of arsenic species in water by …
The experiments were focused on the separation of iAs and oAs species by the use of three different resins, which possesses a specific and selective feature for arsenic species separation. For these purposes, first task was to analyze, compare and prove the efficiency of the SBAE, HY-Fe and HY-AgCl resins and to reveal their …
Adsorption combined with superconducting high gradient magnetic
Therefore, the main objectives of this research were to: (1) used the synthetic water to evaluate the arsenic and antimony adsorption behaviors onto magnetic MnFe 2 O 4 particles; (2) developed a continuous pilot-scale adsorption combined with superconducting magnetic separation system and evaluated its feasibility to separate …
(PDF) Title Selective separation of arsenic species from …
Title Selective separation of arsenic species from aqueous solutions. Ismail M. M. Rahman. See Full PDF Download PDF. See Full PDF Download PDF. Related Papers ...
Critical evaluation of hybrid metal–organic
@article{AnhNguyen2023CriticalEO, title={Critical evaluation of hybrid metal–organic framework composites for efficient treatment of arsenic–contaminated solutions by adsorption and membrane–separation process}, author={Duc Anh Nguyen and Duc Viet Nguyen and Ganghyeon Jeong and Nosheen Asghar and Am Jang}, journal={Chemical …
Arsenic speciation analysis: A review with an …
An emphasis is placed on chromatographic separation techniques, relating the physicochemical properties of arsenic species to their efficient separation. Anion exchange, cation exchange, reversed-phase, ion pair, and size exclusion …
Separation of arsenic(III) and arsenic(V) in ground waters …
Abstract. The predominant species of arsenic in ground water are probably arsenite and arsenate. These can be separated with a strong anion-exchange resin (Dowex 1 × 8; 100–200 mesh, acetate form) in a 10 cm × 7 mm column. Samples are filtered and acidified with concentrated hydrochloric acid (1 ml per 100 ml of sample) at the sample site.
Separation and recovery of arsenic, germanium and
Separation and recovery of arsenic, ... Arsenic, germanium and tungsten in coal ash presented different volatilization situation when sulfur powder was used as the sulfuration reagent under temperature range of 400–600 °C and 10 Pa, as shown in Fig. 2 (c). The results showed that arsenic was easily volatilized out of the reaction system, …
Separation methods applied to arsenic speciation
Abstract. In this chapter, we will focus on the different separation methods including chromatographic and non-chromatographic methods for arsenic speciation. For chromatographic methods, we will introduce high performance liquid chromatography (HPLC), gas chromatography (GC), and electrophoresis (CE). Among them, HPLC is the …
(PDF) Separation of arsenic species by capillary
A simple capillary zone electrophoresis procedure was developed for the separation of arsenic species (AsO (2) (2-), AsO (4) (2-), and dimethylarsinic acid, DMA). Both counter-electroosmotic and ...
Efficient separation of arsenic species of oxyanion As (III) …
1. Introduction. The redox potential of groundwater depends on quantity of dissolved oxygen. The presence of the many contaminants in underground water such as arsenic, lead, cadmium, mercury, chromium and manganese also significantly affect the redox potential and these are released from the sedimentary rocks and soil (Katsoyiannis …
Role of CO2 on trace arsenic and selenium separation from …
Xing et al. [25] investigated the role of O 2 in the real flue gas on selenium removal by CaO using DFT method. The results showed that the presence of O 2 on CaO (0 0 1) surface weakened the adsorption ability for both Se and SeO 2. Nevertheless, the mechanism of arsenic and selenium removal by CaO is not fully understood, especially …
Efficient separation of arsenic species of oxyanion As (III) …
The heavy metal contaminant arsenic exist in the form of arsenite (As(III)) and arsenate (As(V)) ions. These ions are highly carcinogenic that are usually present in the ground water. To date, most of the designed polymer inclusion membrane (PIM) involved only about separation without differentiating the oxidation states.
Separation of natural trivalent oxides of arsenic and antimony
As a result of water treatment of the extract, arsenic oxide (III) is separated—rather than the H 3 AsO 3 acid: (4)2 (C4H9O)3 As + 3H2O → As2O3 ↓ + 6C4H9OH. Infrared spectroscopy confirms the absence of antimony oxide in the precipitate. The yield of arsenic oxide is high and ranges between 90 and 93%.
Chromatographic separation of arsenic species with
The species were separated with a Discovery HS F5 column and a simple, volatile, and isocratic mobile phase of 0.1% (v/v) formic acid and 1% (v/v) methanol. The Discovery HS F5 column with a pentafluorophenyl (PFP) stationary phase gave sharp peaks and full separation of the arsenic species in 5min, and other PFP columns …
Rapid on‐site separation of As(III) and As(V) in waters using a
Rapid on‐site separation of As (III) and As (V) in waters using a disposable thiol‐modified sand cartridge - Du - 2014 - Environmental Toxicology and …
Research on magnetic seeding flocculation for arsenic …
The magnetic flocs with arsenic can be rapidly and efficiently removed by magnetic separation, even if the floc is very fine. This is because the strong magnetic force ( F m ) acts on magnetic particles when they move through a magnetic field ( H ) [6] : (1) F m = V M ( H ) d H d x where V is the volume of the magnetic particle, and M ( H ) is ...
Thermal separation of arsenic and antimony oxides
Thermodynamic analysis of the As-Sb-O system indicated that if arsenic and antimony oxides behave like pure solid phases, then there is no limitation to producing pure antimony oxide by these proposed techniques. The selective volatilization experiments were carried out at 379 °C to 587 °C, using both nitrogen and air as carrier gases and an ...
Efficient separation of arsenic species of oxyanion As …
Device is fabricated for the separation of Arsenic (V) from Arsenic (III) in field studies. Using device the oxidation states of arsenic can be differentiated using …
Separation of natural trivalent oxides of arsenic and antimony
Arsenic is usually sublimated between 300 and 600 °C as "white arsenic" (arsenic oxide) [2] while for the purpose of full transition of antimony to an oxoform (Sb 2 O 3) the material is subjected to an additional roasting above 800 °C [3]. However, the pyrometallurgical method of separation alone has failed to ensure the obtaining of ...
Progressive low-temperature volatilization control: Efficient
Given the high toxicity of arsenic (As) and the strategic importance of antimony (Sb), the separation of As and Sb has become a pivotal concern in the disposal of arsenic‑antimony flue dust and other arsenic‑antimony hazardous wastes.In this study, we propose a controlled roasting process employing anthracite and sulfuric acid …
Research on magnetic seeding flocculation for arsenic …
The magnetic flocs with arsenic can be rapidly and efficiently removed by magnetic separation, even if the floc is very fine. This is because the strong magnetic force ( F m ) acts on magnetic particles when they move through a magnetic field ( H ) [6]: F m = V M ( H ) d H d x where V is the volume of the magnetic particle, and M ( H ) is the ...
