Article
Environmental Sciences
Mahmoud Abdelwahab Fathy, Sabah Mohamed Abdelbasir, Saad Sayed Hassan, Ayman Helmy Kamel, Diaa Rayan
Summary: A mechanochemical activation technique combined with EDTA was proposed to effectively extract lead from the funnel glass of CRT. The method was proven to be efficient with 85% of lead leached in 5 M NaOH solution at 80 degrees C. A kinetic model was established to depict the lead extraction process and the calculated activation energy value was 39.44 kJ/mol.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2021)
Article
Engineering, Environmental
Jianzhang Wang, Shaona Wang, Afolabi Olayiwola, Na Yang, Biao Liu, Jan J. Weigand, Marco Wenzel, Hao Du
Summary: A process of blank roasting-alkaline leaching is proposed to recover spent hydrodesulfurization (HDS) catalysts, with promising results of high leaching efficiency for vanadium, molybdenum, and aluminum under different roasting conditions. The method offers flexibility in controlling leaching of V, Mo, and Al, and achieves clean separation of metals, providing fundamental information for future development of more efficient and cleaner technologies.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Jinhuan Deng, Xun-an Ning, Guoqiang Qiu, Dingyuan Zhang, Jiayi Chen, Jiayi Li, Yongzhao Liang, Yi Wang
Summary: In this study, a new approach combining alkaline leaching with magnetization roasting-magnetic separation was proposed to improve the quality of iron concentrates from iron tailings. The optimal leaching conditions resulted in an increase in iron grade from 59.97% to 65.07% while maintaining an iron recovery of 92.05%. The heat and mineral phase transformation during magnetization roasting weakened inter-mineral bonding and facilitated the extraction of Si and Al minerals from the structure-damaged iron tailings particles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Wan Yang, Xiaojian Liu, Xiangyang Zhou, Jingjing Tang, Fanyun Su, Zhenxiao Li, Juan Yang, Yayun Ma
Summary: In this study, NaOH is innovatively used as a leaching agent for the efficient selective lithium extraction of spent LiFePO4 cathodes, achieving high leaching efficiencies and obtaining Li3PO4 and Fe2O3 products.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Siyu Zhang, Chenglong Zhang, Xihua Zhang, En Ma
Summary: This study proposes a method to recover Li and Co metals from spent LCO batteries using an NH4Cl-acid leaching system and mechanochemical activation. The method achieves high leaching efficiencies by controlling the parameters.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Metallurgy & Metallurgical Engineering
Li-li Qu, Ya-qun He, Yuan-peng Fu, Wei-ning Xie, Cui-ling Ye, Qi-chang Lu, Jin-long Li, Jia-hao Li, Zhi-bo Pang
Summary: A mechanochemical method using SiO2 as a grinding aid was employed to enhance the leaching efficiencies of Co and Li from spent lithium batteries. The results showed that the optimal leaching efficiencies were achieved with a SiO2/LiCoO2 mass ratio of 1:1, grinding speed of 500 r/min, and grinding time of 30 min in citric acid. The surficial properties of LiCoO2 were changed after the mechanochemical grinding treatment, leading to the activation of LiCoO2. The presence of carbon black also contributed to the increased leaching efficiency of Co in citric acid solution. This proposed method provides an efficient way to recover Co and Li from LiCoO2.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Green & Sustainable Science & Technology
Shijie Zhao, Zhiqin Liao, Yu Xie, Xisong Li, Yanyang Dai, Zhirong Li, Mingyu Wang
Summary: In the pressure alkaline leaching process, using Na2CO3 solution showed high molybdenum extraction, lower aluminum leaching, and cost-effective mineral decomposition. Under the optimized conditions, molybdenum leaching reached 95.4% while aluminum leaching was only 0.7%.
JOURNAL OF SUSTAINABLE METALLURGY
(2021)
Article
Biochemistry & Molecular Biology
Tian Wang, Jing Ren, Annavarapu Ravindra, Yan Lv, Thiquynhxuan Le
Summary: This study investigates the properties and distribution of Ni, V, and Fe in the SFCC catalyst using EPMA-EDX, SEM, and XPS techniques. The leaching kinetics of Ni, V, Fe, and Al in different acids are studied under microwave heating. The results show that sulfuric acid is more effective in removing contaminant metals, especially Ni. The leaching kinetics indicate that V has a lower activation energy compared to Fe and Ni, with the removal priority being V > Fe > Ni.
Article
Engineering, Chemical
Long Ye, Haiqiang Gong, Bao Zhang, Xing Ou
Summary: Ammonia leaching is an important method for selective extraction of valuable metals in recycling lithium-ion batteries. In this study, an electrochemical reduction strategy using Fe/Fe2+ as negative electrodes was designed to accelerate the leaching process and successfully extract valuable materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Arif Jumari, Cornelius Satria Yudha, Endah Retno Dyartanti, Muhammad Nizam, Suranto, Agus Purwanto
Summary: The study aims to recover lithium from spent lithium-ion batteries and regenerate cathode materials. It was found that lithium can be efficiently extracted from spent cathodes and high purity Li2CO3 can be obtained. The regenerated cathode material exhibited good performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Chemical
Zhangbiao Xu, Lei Xu, Zhaohui Han, Jianhua Liu, Libo Zhang, Zhi Zhu, Shifu Shen, Hang Li
Summary: The microwave hydrothermal alkaline leaching (MHAL) method effectively removes soluble fluoride from spent cathode carbon (SCC), addressing the serious concern for both the environment and human health. The structure and elemental distribution of SCC before and after MHAL treatment were analyzed, and the optimal reaction conditions for soluble fluoride removal were determined. The MHAL process significantly reduces treatment time and increases fluoride removal rate compared to traditional hydrothermal treatment, ensuring rapid and efficient hazardous waste management.
MINERALS ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Li-Wen Ma, Xiao-Li Xi, Jia-Peng Chen, Fan Guo, Zi-Jie Yang, Zuo-Ren Nie
Summary: In this study, spent WO3/V2O5-TiO2 catalysts were treated to recover valuable metallic elements, such as W, V, and Ti, using a hydrometallurgical process. Selective microwave-assisted alkali leaching was used to remove Al and Si impurities. Enhanced high-pressure leaching was employed to leach W and V, with efficiencies of 95% and 81% respectively. A synergistic extraction method using an extractant mixture was applied to separate W and V, achieving extraction efficiencies of 86.5% and 6.3% with a separation coefficient (V/W) of 95.30. The product obtained after extraction was precipitated to yield ammonium paratungstate (APT) and NH4VO3. The TiO2 catalyst carrier residue met commercial specifications for reuse. This comprehensive recovery process realizes the resourceful utilization of spent catalysts.
Article
Construction & Building Technology
Peng Wang, Linyuwen Ke, Ayesha N. S. Sze, Zike Wang, Jun Zhao, Weiwen Li, Christopher K. Y. Leung
Summary: Glass fiber reinforced polymer (GFRP) rebars are being used to replace steel reinforcements in concrete structures to prevent corrosion. However, the tensile strength of GFRP rebars can degrade over time due to the degradation of glass fibers when exposed to a moist concrete with a high pH level. This study investigates the degradation of glass fibers under various conditions and provides useful information on the degradation mechanism in an alkaline environment.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Richard Nasilele Mutafela, Fei Ye, Yahya Jani, Joydeep Dutta, William Hogland
Summary: The mechanical activation and leaching with nitric acid method can effectively extract lead from glass waste, improving extraction efficiency, and can operate with lower acid concentration, shorter leaching time, and lower temperature.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhang Du-chao, Liu Ruo-lin, Wang Hao, Liu Wei-feng, Yang Tian-zu, Chen Lin
Summary: A process of primary normal pressure leaching and secondary alkaline pressure leaching is proposed to recover zinc from electric arc furnace (EAF) dust. After the two-stage leaching process, the leaching rate of zinc in EAF dust can achieve 88.7%. The magnetite in the alkaline pressure leaching residue can be recovered by magnetic separation.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
Article
Metallurgy & Metallurgical Engineering
Arsyad Maulana Dzulqornain, Ana Belen Cueva-Sola, Kyeong Woo Chung, Jin-Young Lee, Rajesh Kumar Jyothi
Summary: This study presents a hydrometallurgical process for the separation of light rare earth elements (LREEs) using oxidation, precipitation, solvent extraction, and stripping techniques. Selective oxidation with potassium permanganate was employed for the separation of cerium (III). Solvent extraction with Cyanex 572 and cross-current scrubbing were used to achieve the separation of lanthanum (III) from neodymium (III) and praseodymium (III).
Article
Metallurgy & Metallurgical Engineering
Bo Chen, Shenxu Bao, Yimin Zhang
Summary: This study investigated the effects of Al, Fe, P, Si and Na on the precipitation characteristics of vanadium in the ultrasound precipitation system. The concentration upper limits and the negative influence on the precipitation kinetics were determined for each impurity. The findings provide theoretical and technical support for the industrial application of ultrasound precipitation technology.
Article
Metallurgy & Metallurgical Engineering
Chunlin He, Mingwei Qi, Yun Liu, Zunzhang Liu, Yuezhou Wei, Toyohisa Fujita, Guifang Wang, Shaojian Ma, Wenchao Yang, Junyuan Gan
Summary: In this study, D201 x 7 resin and tartaric acid were used as materials and complexing agents for the separation of germanium from sulfuric acid solution. The study successfully achieved the separation of germanium and demonstrated the high selectivity and adsorption performance of the resin.
Article
Metallurgy & Metallurgical Engineering
Xiaobo Zhu, Yue Liu, Chen Ma, Wang Li
Summary: A selective and highly effective method for the extraction and separation of V(IV) and Fe(III) using N235 and P507 as solvent extractants is proposed. The pH, composition, and concentration of the extractant mixture have significant effects on the extraction efficiency and separation factor. The mixing of P507 and N235 generates the P507 monomer, which enhances the extraction efficiency and weakens the stability of vanadium containing extraction complex. Cation exchange process forms the extraction complexes.
Article
Metallurgy & Metallurgical Engineering
B. Behnajady, J. Yousefi Seyf, S. Karimi, M. Moradi, M. Sohrabi
Summary: Deep eutectic solvents (DES) have potential as environmentally-friendly solvents for recovering metals from spent lithium-ion batteries (LIBs). Experimental and molecular dynamics simulation results showed that the chloride ions in DES can form complexes with lithium, manganese, and nickel ions, facilitating their extraction.
Review
Metallurgy & Metallurgical Engineering
Sebastian Kinas, Dorota Jermakowicz-Bartkowiak, Anna Dzimitrowicz, Piotr Cyganowski
Summary: The high demand for platinum-group metals (PGMs) and Re in economical and industrial applications related to environmental protection and energy conversion/storage has led to resource scarcity. Thus, it is crucial to recover and recycle these rare metals. This study critically reviews the recent progress in the effective recovery of PGMs and Re from materials relevant to sustainable technologies, emphasizing practical aspects, environmental impact, and issues related to the unit processes of recovery.
Article
Metallurgy & Metallurgical Engineering
Guopeng Yang, Qinggang Li, Guiqing Zhang, Mingyu Wang, Zuoying Cao, Wenjuan Guan, Jiawei Du, Shengxi Wu
Summary: The study proposes an efficient, clean, and economical process for recovering V2O5 from titanium-white waste through hydrogen peroxide stripping and precipitation of vanadium products by heating. Experimental results show that the use of D2EHPA as a modifier prolongs the duration of maximum stripping efficiency, enabling continuous operation.
Article
Metallurgy & Metallurgical Engineering
Guisu Yu, Shuainan Ni, Yun Gao, Ditang Mo, Zhiyuan Zeng, Xiaoqi Sun
Summary: This research proposes a novel green process for the selective recovery of rare earth elements (RE) from spent NdFeB permanent magnet using hydrophobic deep eutectic solvent (HDES). Through optimization of extraction conditions and stripping method, efficient and clean separation and recovery have been achieved.
Article
Metallurgy & Metallurgical Engineering
Jia Li, Xinsheng Wu, Xiaozhou Zhou, Li Zeng, Shengxi Wu, Mingyu Wang, Wenjuan Guan, Zuoying Cao, Qinggang Li, Guiqing Zhang
Summary: This paper presents a complete hydrometallurgical route for the full-component utilization of deep-sea polymetallic nodules (DPN), achieving high recovery efficiency and near-zero waste production with low energy consumption.
Article
Metallurgy & Metallurgical Engineering
Sanae Elmisaoui, Abderrazak M. Latifi, Lhachmi Khamar
Summary: A first principles model is developed to describe the dissolution mechanism of phosphate ore particles in a solution of phosphoric acid. The model accounts for non-uniform size of ore particles using particle size distributions and quantifies their influence on the model predictions. A global estimability analysis is carried out to determine the estimable parameters from experimental data, and the predictions show good agreement with the experimental data. The computed activation energy indicates that diffusion is the rate limiting step of the dissolution process.
