Co-extraction of vanadium and chromium from vanadium-chromium…
@article{Liu2023CoextractionOV, title={Co-extraction of vanadium and chromium from vanadium-chromium–bearing reducing slag via oxygen microbubbles intensified copper oxide catalytic oxidation method in alkaline solutions}, author={Zhiqiang Liu and Yeqing Lv and Shaona Wang and Biao Liu and Peng Liang and Hao Du and Lanjie Li and Yi Zhang ...
The effect of diluent on the extraction: Amide extracting chromium …
Ionic liquids also have the ability to extract chromium, which can interfere with the results of amide extracting chromium. ... This meant that the extraction performance of the extraction system was closely related to the polarity of diluents. It was found that, alkanes provided higher D values than chloroform and aromatic …
Evaluation of extraction methods for hexavalent chromium …
One of the difficulties in performing speciation analyses on solid samples is finding a suitable extraction method. Traditional methods for extraction of hexavalent chromium, Cr(VI), in soils, such as SW846 Method 3060A, can be tedious and are not always compatible with some determination methods. For example, the phosphate and …
Green redox separation and efficient extraction of vanadium …
Green sucrose reduction-H 2 O 2 selective oxidation route is proposed for selective redox separation of Cr and V.. The difference in redox properties between V and Cr in solution is analyzed. • The optimum parameters on extraction ratio and purity of Cr 2 O 3 and V 2 O 5 products are studied.. High extraction ratios of chromium (96.3%) and vanadium …
An efficient utilization of chromium–containing vanadium tailings
Chromium–containing vanadium tailings (CCVT), an industrial waste, were utilized to extract chromium efficiently by soda roasting–water leaching process and for the preparation of highly pure ...
Extraction of chromium, copper, and arsenic from CCA …
The extraction efficiency for chromium and arsenic are shown in Fig. 1 (b) and (c), respectively; the removal rates of chromium and arsenic were lower than that of copper. The extraction efficiency for both CCA metals was similar, even though the extractability of chromium was slightly lower compared to arsenic.
Extraction Of Chromium From Leather Chrome Shaving Dust
In this study, we incinerated chrome shaving dust at 500oC to 7000C for chromium extraction. Various oxidizing acids with different concentration were used for chromium extraction. ... RELATED PAPERS. ISBN: 978-0-648. Removal of chromium from tannery effluents using egg and snail shells. 2019 • Mohammad Nazmul Hossain. …
Review: Research Progress on Liquid–Liquid Extraction of Chromium
Liquid–liquid extraction processes of Cr (VI) and Cr (III) are respectively investigated in detail in subsequent sections. The typical oxidization effect of Cr (VI) and aging effect of Cr (III ...
Distribution and extraction of chromium from phosphate ore
The errors related to the sequential are strongly bound to secondary minerals in the soil besides extraction process were about 15%, which is acceptable as sulfur and phosphate. In addition, the total concentration in they are in the range of 10 to 20% (Quevauviller et al. the mobile fraction (based on the sum of the first three frac ...
Robust route to efficient extraction of Cr from …
Under optimal conditions, the recovery of Cr could reach almost . Notably, this Cr extraction technique is applicable to the industrial large-scale chromium recovery of COPR at the ton level, …
Extraction and recovery of chromium from electroplating …
The best conditions, yielding a chromium recovery of about 92%, were a time of 60 min, a temperature of 60 °C and 2.1 mol/L peroxide. Additional essays revealed that the same result could be obtained with more economic conditions (40 min, 1.4 mol/L peroxide and 60 °C). This technique proved not only effective in comparison with existing ...
Extraction of chromium from domestic chromites by alkali …
Investigation of Efficient Conditions for Oxidative Roasting of Chromite Ore to Produce Potassium Chromate with KOH Additive. A method of producing potassium Chromate directly from chromite ore and KOH was investigated. The chromium recovery was >90% after roasting at 800°C for 3 hours. The KOH‐to‐ore weight ratio was 1.2:1….
Chromium: Benefits, Side Effects, and More
Due to its effects on insulin action, chromium is an essential nutrient. Some people take chromium to manage diabetes, weight gain, metabolic syndrome, polycystic ovary syndrome (PCOS), and blood cholesterol levels. While some evidence supports some of these claims, there is not enough research to recommend chromium supplementation …
Extraction Behavior of Vanadium and Chromium by …
ABSTRACT Calcification roasting-acid leaching were conducted to investigate the extraction behavior of vanadium and chromium from high-chromium vanadium slag (HCVS). The conditions were optimized by response surface methodology (RSM). Results showed that when HCVS and CaO were mixed in m(CaO)/m(V2O5) of …
Chromium processing | Extraction, Uses & Applications
If carbon and Cr2O3 are combined in a molar ratio of 3:1 and subjected to increasing temperature, a number of oxidation-reduction … See more
Recovery of Chromium(III) by Solvent Extraction with D2EHPA
Expand. 17. In order to recover Cr (III) from wastewater,the behavior of Cr (III) extraction with di-02-ethylhexyl phosphoric acid (D2EHPA) as extractant and kerosene as solvent was studied.The effects of species of saponifier,pH of the aqueous solution,varieties of extractant modifier and D2EHPA concentration on the extraction equilibrium were ...
Liquid-Liquid Extraction/Recovery of Chromium(VI) From …
Liquid-liquid extraction of chromium (VI) from synthetic waste solution using Alamine 336/kerosene was investigated. The extraction conditions were evaluated by varying the experimental parameters.
Evaluation of extraction methods for hexavalent …
Traditional methods for extraction of hexavalent chromium, Cr (VI), in soils, such as SW846 Method 3060A, can be tedious and are not always compatible with …
Hexavalent Chromium Inhibited Zebrafish Embryo …
This study aimed to assess the effects of hexavalent chromium on zebrafish (Danio rerio) embryo development. The zebrafish embryos were treated with solutions containing chromium at different concentrations (0.1, 1, 3.125, 6.25, 12.5, 50, and 100 µg/mL). The development of zebrafish embryos was estimated by the determination of …
Extracting Chromium from Stainless Steel Slags by …
An effective extraction of chromium from SSL slag might be a solution. The conventional industrial process in chromium extraction from chromite involves adding Na 2 CO 3 to chromite during the sample roasting. The authors found that if a similar process is used to extract chromium from SSL slag, the chromium extraction was 33% at 800 °C.
Solvent extraction of chromium(III) by salicylic, thiosalicylic, …
The inefficiency of most chromium extraction systems is due to the inertness of the hexaquochromium ion Cr (H 2o) 6+3 . ... ( III) was reported, salicylic acid was deemed worthy of investigation in the case of chromium extractton. The related sulfur derivative of salicylic acid, thiosalicylic acid, was also investigated in the belief that ...
Extraction of Chromium from Chromite Ore
The average grade of the metallurgical chromite ore was 43.4 pct Cr2O3, with 52 pct of the ore having a chromium-to-iron ratio of 3:1 or over, 17.6 pct having a ratio between 2:1 and 3:1, and 30.4 pct …
Extraction of chromium, copper, and arsenic from CCA …
The increased pH and hydroxide ion conditions (possible chromium hydration) restrained the extraction efficiency of Cr in the present experiment. At higher pH level, chelating solution was unable to effectively break the wood-metal bonds and to form a soluble complex. Thus, lower pH conditions (pH 3.0–5.0) were more effective than higher …
An efficient method of chromium extraction from chromium …
DOI: 10.1016/J.HYDROMET.2016.02.020 Corpus ID: 101496228; An efficient method of chromium extraction from chromium-containing slag with a high silicon content @article{Kaiping2016AnEM, title={An efficient method of chromium extraction from chromium-containing slag with a high silicon content}, author={Yu Kaiping and Bo Chen …
The role of some compounds on extraction of chromium…
The role of some compounds on extraction of chromium(VI) by amine extractants. The role of some compounds on extraction of chromium(VI) by amine extractants. Reda R . Sheha. 2005, Journal of Hazardous Materials. See Full PDF Download PDF.
The effect of diluent on the extraction: Amide …
Guannan, Qifeng Wei, Xiulian. Add to Mendeley. https://doi/10.1016/j.molliq.2023.122205 Get rights and content. Highlights. •. The …
Removal and speciation of chromium by static step …
Highlights. •. Static step-by-step deposition and extraction technique. •. Efficient, rapid and low cost treatment of chromium species. •. Cr (III) was highly …
Chromium: Occurrence, principles of extraction, Properties …
The important ore of chromium is Chromite or chrome ore, FeO Cr 2 O 3 . The chief ore of chromium is chromite ore. Extraction of chromium metal from chromite ore . The extraction of chromium metal from chromite ore consists of the following steps. 1. Concentration . The crushed ore is concentrated by gravity separation method. 2.
Review: Research Progress on Liquid–Liquid …
The major extraction mechanisms of Cr(VI) and Cr(III) consist of ion association and complexation extraction, which are related to the extractant and …
Solid-phase extraction of chromium(iii) with an ion …
A new chromium(III)-imprinted azodicarbonamide-functionalized attapulgite sorbent was synthesized by a surface im technique and was employed as a selective solid-phase extraction material for speciation analysis of chromium(III) in environmental water samples prior to its determination by inductively coupled plasma …
