Removal of iron from silica sand by leaching with …
The present work aims to study the removal of iron from silica sand with oxalic acid. Based on the above mechanistic observations, an attempt was made to optimise the process parameters and reach ...
Methods used in the beneficiation of silica sand and …
This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and presence of ultrasound. The parameters investigated …
Impact of dissolved silica on arsenite removal by nano …
Combined effects of anions on arsenic removal by iron hydroxides. Toxicol. Lett. (2002) T. Moller et al. Effect of sililca and pH on arsenic uptake by resin/iron oxide hybrid media ... such as biochar [11,12], and natural silica sand [22,18–25], is another effective way to prevent the aggregation of FeS nanoparticles and increase their ...
Methods used in the beneficiation of silica sand and …
This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and presence of ultrasound. The parameters investigated were the reaction temperature, stirring ...
Iron Removal Process for High-Purity Silica Sands Production …
In this article, a leaching study, carried out on a quartz sample to obtain high-purity silica sands, has been presented. A leaching process by using oxalic acid to …
Iron and Aluminium Removal from Algerian Silica Sand by …
The effects of acids on the removal of impurity from silica sand have been studied using leaching acids: mixture composed of HF/HCl/H2O with a volume composition of (1:7:24).The obtained material ...
8 Methods for Removing Iron From Silica Sand | M&C
By using water washing to remove mud and iron, the iron content in silica sand can be effectively reduced, and the quality and value of silica sand can be improved. 2. Gravity Separation for Iron Removal. Silica sand gravity separation for iron removal is a method of separating iron impurities and the difference in specific gravity of silicon sand.
How to remove iron from silica sand by magnetic separator?
Fe2O3 content is an important index of silica sand quality. Iron removal is accompanied by the whole process of silica sand production. In the sand washing plant, washing, classification, desliming are the primary treatment of silica sand.Removing the thin-film iron and adhesive impurity minerals on the surface of silica sand will remove …
Removal of iron and other major impurities from silica …
for the removal of iron and other major impurities from silica sand. Mal!netic seoaration: Dry magnetic separation tests were carried out on particle size fractions +0.3 mm. For the fractions +4. ...
Removal of iron from silica sand: Integrated effluent …
If the mineral surface is already contaminated, different leaching methodologies have been used for removal of impurities. In the case of iron contaminated quartz, leaching with oxalic acid (Taxiarchou et al., 1997), oxalic acid and sulphuric acids (Veglio et al., 1998), phosphoric acid (Zhang et al., 2012), microbes (Groudev and …
Removal of iron from silica sand by leaching with oxalic acid
The removal of iron from silica sand with oxalic acid has been studied under various experimental conditions in order to optimise the process parameters and reach a high degree of iron removal at ...
Improvement of iron removal from silica sand using …
Hence the silica sand was subjected to our work without prior grinding. The influence of pH of the initial solution, which has been confirmed by many workers, would not be discussed in this paper. Conclusion. In conclusion, we have found the best conditions for the iron removal from the silica sand under ultrasound irradiation.
Characterization and Iron Removal Enhancement of …
Zaafarana silica sand and develop a better understanding of the eectiveness of phosphoric/oxalic acid mixture for iron removal from silica sand in terms of leaching parameters. 2 Maerial t and Methods 2.1 Maerialst The silica sand samples used in this work were obtained from El-Zaafarana area, Wadi-El-Dakhl, Eastern Desert, Egypt.
Effect of amorphous silica and silica sand on removal of …
Removal of Cr(VI) occurred more rapidly when silica was used. Fig. 1 b indicates 10 mg l −1 Cr(VI) was completely removed within 5 min at all silica doses, with the rate of reaction increased with increasing silica dose. Fig. 2 shows a schematic diagram of the possible pathways of Cr(VI) reduction in the presence of silica. The greater …
Improvement of iron removal from silica sand using …
This paper deals with the removal of iron from silica sand in aqueous oxalic acid, in the absence and presence of ultrasound. The parameters investigated were the reaction temperature, stirring speed, ultrasound power, acid concentration and reaction time. The optimum conditions for the maximum removal of 75.4% of iron with ultrasound were ...
Removal of iron from silica sand by surface cleaning using …
The purpose of these experiments is to investigate the possibility to use power ultrasound to remove iron-rich coatings from the surfaces of silica sand for glass making. Experiments show that the iron-rich coating on a particle surface of silica sand with 0.18% Fe 2 O 3 was reduced to 0.11% with powerful ultrasonic an experiment set-up from our …
Removal of iron from silica sand by leaching with oxalic acid
Conclusions This work aimed to study and optimise the parameters affecting the removal of iron from silica sand with oxalic acid and has shown that: - At temperatures lower than 80°C the m a x i m u m iron extraction that can be achieved is approximately 30%. - Part of the iron mineral phases contained in silica sand can be dissolved at ...
8 Methods for Removing Iron From Silica Sand | M&C
The iron removal efficiency of a process can be calculated using the equation: (4) Iron removal efficiency (%) = 1-amount of iron in leached solid samples …
High efficiency iron removal from quartz sand using phosphoric acid
Phosphoric acid (H 3 PO 4) was firstly used to remove iron impurities at very low concentrations from quartz sand under ultrasound irradiation with higher efficiency, simpler technology and is less harmful to the target product compared with the other comparable methods that use industrial strong acids such as sulfuric (H 2 SO 4), …
Fe (II) and Mn (II) removal from drilled well water: A case …
Manganese sand filter and silica sand filter can remove 3–6 mg/L of ferrous iron 0.9 mg/L and 0.6 mg/L of manganese respectively under the operation conditions of DO (5 mg/L), pH 7.2, and flow rate 3.9 m/h. The kinetics analysis indicated that the iron removal versus flow rate followed the first-order reaction. This kinetics …
Effective Silica Removal for Industrial Water Treatment
In Summary: Effective silica removal in industrial water treatment involves a combination of methods tailored to the specific application, including lime softening, catalytic media, reverse osmosis, ultrafiltration, and electrocoagulation, to remove both colloidal and dissolved silica forms and prevent scaling, equipment damage, and process downtime.
Implementation of sulfuric acid leaching for aluminum and iron removal …
The aim of our research is to improve low-grade silica from quartz sand by removing impurities, especially aluminum and iron removal, using sulfuric acid leaching.
Removal of iron from silica sand by leaching with …
For the specific silica sand sample used, at temperatures varying between 90–100°C the maximum iron extraction that can be …
(PDF) Improvement of Impurities Removal from Silica Sand …
Type and concentration of collectors, type of acid, pH, conditioning time, solid-in-pulp concentration, particle size and temperature up to 90 [10] 1.5 (silica sand) HF and HCl Concentrations of ...
The Modeling and Optimization of Iron Removal from Silica …
This study aimed to remove the contaminants in quartz sand by using an eco-friendly method and to obtain high-purity quartz. For this purpose, ultrasound …
Eco-friendly strategy for preparation of high-purity silica …
Arslan Volkan studied iron removal from silica sand using ultrasound-assisted mixed acid leaching technology and consequently obtained high-purity silica with 99.907% of SiO 2 content (Arslan, 2021). Buttress et al. produced high-purity silica via microfluidic-inclusion fracture using microwave pre-treatment ( Buttress et al., 2019 ).
Removal of iron from silica sand by leaching with oxalic acid
DOI: 10.1016/S0304-386X(97)00015-7 Corpus ID: 95714726; Removal of iron from silica sand by leaching with oxalic acid @article{Taxiarchou1997RemovalOI, title={Removal of iron from silica sand by leaching with oxalic acid}, author={Maria Taxiarchou and Dimis Panias and Iliana Douni and Ioannis Paspaliaris and A. Kontopoulos}, …
Promising use of Omani silica sand in energy storage
"The silica sand in fthe Sultanate of Oman was found to be ultra-pure; a composition National Renewable Energy Laboratory (NREL) [part of the US Department of Energy] has proven to have ideal thermal properties for its use as a Thermal Energy Storage system. NREL has also proposed a standalone sand-TES concept, which offers …
PURESIL® Extra Low Iron Glass Sand
PURESIL extra low iron glass sand is produced from high-purity, whole grain crystalline silica with a remarkably low iron content. ... Statistically accurate removal of coarse and fine grains ... Downloads. Glass Silica Sand Product Portfolio; Facebook LinkedIn. COVIA. 3 Summit Park Drive, Suite 700, Independence, OH 44131. Industrial Customer ...
Effect of amorphous silica and silica sand on removal of …
The effect of two surfaces (amorphous silica and silica sand) on the reduction of chromium(VI) by zero-valent iron (Fe(0)) was investigated using batch reactors. The amendment of both surfaces significantly increased the rate and extent of Cr(VI) removal. The rate enhancement by amended surfaces is …