For intercalation electrodes based on manganese oxides (birnessite), the regeneration mechanism has been observed via multi-cycles of redox reactions in Na 2 SO 4. The regeneration efficiency was observed to decrease by 10% after the first cycle and then to 34% after the second cycle, possibly due to strong chemisorption of metal ions …
Department of Industrial and Information Engineering and Economy, University of L'Aquila, via G. Gronchi 18, 67100 L'Aquila, Italy Interests: chemical engineering; waste management; waste treatment; …
DOI: 10.1016/J.HYDROMET.2007.08.010 Corpus ID: 96215762; Manganese metallurgy review. Part I: Leaching of ores/secondary materials and recovery of electrolytic/chemical manganese dioxide
This paper reviewed various hydrometallurgy methods developed in the last decade for the recovery of cathode materials for lithium-ion batteries from various battery chemicals, such as LCO, LMO, NCM, and LFP, for the recovery of cobalt, nickel, manganese, and lithium. As shown in ... spent lithium-ion batteries via advanced …
Lithium-ion batteries (LIBs), with their outstanding characteristics such as high specific capacity, stable operating voltage, and low self-discharge rate, are considered one of the most promising energy and energy storage devices of the new century [1, 2].Lithium manganese oxide (LiMn 2 O 4) has a spinel structure, allowing lithium ions to embed …
Manganese is extensively used in various advanced technologies. Due to high manganese demand and scarcity of primary manganese resources, extracting the metal from spent batteries is gaining increasing interest. The recycling of spent batteries for their critical metal content, is therefore environmentally and economically feasible. The …
The present work provides an investigation of the recovery of manganese from a relatively low-grade ore (37.5% Mn) located in Um Bogma, Sinai area, Egypt. Several leaching experiments have been performed in HNO3 acid medium to which molasses as an additive was used to benefit from the reduction action of glucose and …
Via the use of a UF Falcon, it was possible to achieve rougher gravity REO recoveries approaching the upper 80% range while rejecting on the order of 30% of the total calcium. In terms of purely REO recovery, this represents a significant improvement over results obtained via a traditional Falcon in previously reported studies. Full article
The challenge to recovery of manganese from these waste solutions lies in the relatively low manganese concentration (1–5 g/L) together with large amounts of impurities, e.g. about 10 g/L magnesium in a typical nickel laterite waste effluent. ... Hydrometallurgy (2000) Diniz C.V. et al. The use of the chelating resin Dowex M-4195 …
Manganese recovery reached 99% comparing to calcium recovery rate and magnesium recovery rate of 54% and 12%, respectively. Additionally, XRD revealed that precipitates formed mainly composed of rhodochrosite (Fig. 5). ... Hydrometallurgy, 89 (3–4) (2007), pp. 160-177. View PDF View article View in Scopus Google Scholar. …
4. Hydrometallurgical treatment of WEEE for recovery of critical elements. Hydrometallurgy of WEEE consists of at least two main unit operations, namely (1) leaching (solubilization of metals from WEEE into leachates using aqueous chemicals) and (2) recovery (selectively recovering the dissolved metals from the leachates) (Figure …
The release of halogenated and chlorinated compounds such as dioxin from burning the nonmetallic parts of the E-waste (Tsydenova and Bengtsson, 2011) has resulted in the search for alternative recovery methods. Hydrometallurgy is the first step that needs to be investigated for metal recovery: extracting the valuable metals into …
Most of the laterite contains 0.7 to 1.84 wt% of Ni, and recovery with leaching in all the cases is more than 85%. Recovery is more than 90% for laterite with more than 1% nickel content irrespective of mineralogy. Table 12 explains that atmospheric leaching shows less nickel recovery with sulfuric acid leaching than with NAPL. Hence, …
Ismael and Carvalho, 1996, Ismael and Carvalho, 1999 and Ismael (1999) studied the extraction of iron with a mixture of DEHPA/Primene JMT/2-octanol diluted in ShellSol T. Some of the experiments were carried out with an aqueous solution containing 15 g/l of Fe 3+ and different mixtures of the above extractants. Satisfactory results are …
The resulting black mass is leached in H 2 SO 4 in the presence of steel shots, which allow the recovery of residual Cu via cementation. The following steps involve the oxidation of Fe as hydroxides using H 2 O 2 or O 2 and the precipitation of Li 3 PO 4 with H 3 PO 4 and pH adjusting agents [ 46 ].
The effect of HNO 3 acid concentration between 0.5 and 3.5 M on the reductive leaching of Um-Bogma manganese ore in the presence of molasses is illustrated in Fig. 1.The other leaching conditions were fixed at 100 °C for 3 h, in the presence of molasses (20% of the input sample weight) and using ore sample ground to − 74 µm …
Recycling lithium (Li) from spent lithium-ion batteries (LIBs) due to the depletion of natural resources and potential toxicity is becoming a progressively favourable measure to realize green ...
Manganese is a major impurity which needs to be removed in many hydrometallurgical processes while some waste solutions are also important secondary …
The recovery of silver ions from wastewater is of great importance due to their adverse environmental impact and significant economic value. This paper introduces a novel adsorbent (CS-AHMT) that can be easily synthesized via a one-step functionalization of chitosan with 4-Amino-3-hydrazino-1,2,4-triazol-5-thiol to efficiently recover silver ions …
The growing demand for manganese and environmental regulations had made it increasingly important to develop a process for the recovery of manganese from manganese sludge before dumping.
In the current work, recycle of manganese from copper EW to SX was simulated on a laboratory scale in continuous trials to investigate the mechanism of organic degradation via recycle of manganese from EW. During copper EW trials, Mn 2+ in the electrolyte was primarily oxidised to Mn 3+, which was further oxidised to MnO 4 −.
The manganese content of the slag (> 30%) makes it attractive for manganese recovery with hydrometallurgical methods and using the residue for …
A high recovery of manganese from solutions containing multiple metals (such as Fe, Co, Ni, Zn, Ca, Mg, and Cu) by utilizing hydroxide, carbonate, or oxidative …
A new 2.5-Mtpy DRI plant will be installed in the Sultanate for the Jindal Steel Group company. Vulcan Green Steel, a new company within the Jindal Steel Group, has chosen ENERGIRON® technology for its new hydrogen-ready direct reduction plant in Duqm, Al Wusta Governorate, Sultanate of Oman.. The H2-ready ENERGIRON® …
The manganese was recovered as MnSO 4 in aqueous phase and D2EHPA could be reused after saponification. Finally, lithium was precipitated by 0.5 mol L −1 sodium phosphate. Under their optimal conditions, the recovery percentages of Ni, Co, Mn, and Li can reach 98%, 97%, 98%, and 89%, respectively.
The world rapidly growing demand for manganese has made it increasingly important to develop processes for economical recovery of manganese from low grade manganese ores and other secondary sources.
The recovery of gold from e-waste is of great importance for economic value and sustainability, as gold contained in e-waste can be manyfold that in primary gold deposits. Hydrometallurgy has succeeded in recovering gold from e-waste using different technical approaches owing to its mild operation, affordability, and low gas emission.
DOI: 10.1016/J.HYDROMET.2019.06.011 Corpus ID: 198346739; Recovery of cobalt, lithium, and manganese from the cathode active materials of spent lithium-ion batteries in a bio-electro-hydrometallurgical process
Conventional neutralization treatment for manganese (Mn)-bearing mine drainage provides a challenge of cost-efficiency, and new approaches should be …
Li + adsorption by acid-treated LTMOs was conducted batch-wise, and parameters affecting lithium uptake and Mn dissolution, such as calcination temperature, and Ti content, were examined. A schematic of the procedure used for Li + recovery in seawater utilizing LTMO is provided in Fig. 1.Li + adsorption isotherms were obtained by …
The experimental scheme for the recovery of soluble manganese is shown in Fig. 2.At room temperature, a specific amount of ammonia water was added to 250 mL of EMR leachate solution for pre-precipitation.Immediately, CO 2 gas was bubbled into the solution at a specific flow rate for 1 to 15 min. The resulting solution was subsequently …
Modern hydrometallurgy has been developing for more than 100 years and the related articles keep piling up. Based on a bibliometric analysis of the articles in Hydrometallurgy, the most authoritative journal in the field of hydrometallurgy, we try to catch the research and development trends from a global perspective.Firstly, keywords …
In this study, continuously operated pilot experiments demonstrated that CO 2 can be used to effectively and selectively recover manganese from wastewater …