Results 21 to 30 of about 412,588 (342)

Recovery of Gold from the Refractory Gold Concentrate Using Microwave Assisted Leaching

Metals, 2020
Microwave technology has been confirmed to be suitable for use in a wide range of mineral leaching processes. Compared to conventional leaching, microwave-assisted leaching has significant advantages.
Kanghee Cho, Hyunsoo Kim, Eunji Myung, Oyunbileg Purev, Nagchoul Choi, Cheonyoung Park   +5 more
doaj   +1 more source

Study on Adding Ammonium Hydrogen Fluoride to Improve Manganese Leaching Efficiency of Ammonia Leaching Low-Grade Rhodochrosite

Metals, 2021
The ammonia leaching method for treating low-grade rhodochrosite has the advantages of a good impurity removal effect and low environmental pollution. In this paper, aiming at the low leaching efficiency of low-grade rhodochrosite treated by the ammonia ...
Peng Yang, Xiaoping Liang, Chengbo Wu, Tengfei Cui, Yu Wang   +4 more
doaj   +1 more source

Catch crop strategy and nitrate leaching following grazed grass-clover [PDF]

, 2007
Cultivation of grassland presents a high risk of nitrate leaching. This study aimed to determine if leaching could be reduced by growing spring barley (Hordeum vulgare L.) as a green crop for silage with undersown Italian ryegrass (Lolium multiflorum Lam.)
Andersen A., Best E.K., Davies D.B., Djurhuus J., Eriksen J., Hansen B., Jacobsen A., Karlsson-Strese E.-M., Kyllingsbaek A., Macduff J.H., Madsen H.B., Nielsen K.A., Nielsen K.A., Shepherd M.A., Simmelsgaard S.E., Tersbol M., Thomsen I.K., Trinsoutrot I.   +17 more
core   +1 more source

Comparison of nitrification inhibitors to restrict nitrate leaching in a maize crop irrigated under mediterranean conditions [PDF]

, 2010
The aim of this paper was to compare dicyandiamide (DCD) and 3,4 dimethylpyrazole phosphate (DMPP) as inhibitors of ammonium oxidation and nitrate leaching after applying fertilizer to a maize (Zea mays L.) crop grown under Mediterranean conditions.
Arauzo, M., Diez, J.A., Hernaiz, P.J., Sanz Cobeña, Alberto, Vallejo Garcia, Antonio   +4 more
core   +3 more sources

Microwave-assisted and regular leaching of germanium from the germanium-rich lignite ash

Green Processing and Synthesis, 2018
Demand for germanium (Ge) is rapidly growing in recent years in various fields including semiconductors, aerospace, and solar cells. However, the Ge resources are very limited in the world.
Chen Yuqian, Zhou Junwen, Zhang Libo, Peng Jinhui, Li Shiwei, Yin Shaohua, Yang Kun, Lin Yaping   +7 more
doaj   +1 more source

Effects of Ammonium Salts on Rare Earth Leaching Process of Weathered Crust Elution-Deposited Rare Earth Ores

Metals, 2023
In order to reveal the influence of ammonium salts on the rare earth leaching process of weathered crust elution-deposited rare earth ores, ammonium acetate, ammonium chloride, and ammonium sulfate were used as leaching agents.
Zhenyue Zhang, Changyu Zhou, Wendou Chen, Fei Long, Zhuo Chen, Ru’an Chi   +5 more
doaj   +1 more source

Metal leaching test of commercially available faucets in the Japanese market in 2016–2020

Journal of Water and Health, 2022
In this study, metal leaching was investigated in commercially available faucets in Japan to clarify their compliance to Japanese regulations. We purchased 37 faucets from the market and analyzed the leaching of cadmium, mercury, selenium, lead (Pb ...
Taro Miyoshi, Dai Simazaki, Marina Tokuyasu, Takanori Masuda, Michihiro Akiba   +4 more
doaj   +1 more source

Treatment of copper-containing leaching residue by sulfation roasting followed by acid/water leaching

Mongolian Journal of Chemistry, 2023
This research investigates the extraction of copper from copper-containing leaching residue, which includes 33.45% of copper, 14.14% of iron, 23.87% of sulfur and trace amounts of silver and other elements.
Nyamdelger Shirchinnamjil, Narangarav Tumen-Ulzii, Nemekhbayar Davaadorj, Khulan Byambasuren, Sarantsetseg Purevsuren, Ulziibadrakh Erdenebat, Enkhtuul Surenjav   +6 more
doaj   +1 more source

Hydrometallurgy leaching of manganese from electrolytic manganese anode slime using hydrogen peroxide as reducing agent

工程科学学报, 2023
Manganese is one of the important strategic resources in China, and there is a saying that “no manganese, no steel”. In 2020, China’s output of electrolytic metal manganese was 1501300 tons, accounting for 96.5% of the global output.
Jun-jie ZHAO, Lin-hong CAI, Jian-cheng SHU, Jing CAO, Yong YANG, Meng-jun CHEN   +5 more
doaj   +1 more source

A Novel Selective Oxygen Pressure Leaching for Zinc Extraction from Hemimorphite in Acid-Free Solutions

Metals
A novel acid-free oxygen pressure leaching for the extraction of zinc from hemimorphite was proposed in this study. Green vitriol (FeSO4·7H2O), as one of the important industrial by-products, was used as the leaching reagent to separate zinc from silicon
Tong Wang, Yubo Zeng, Shuang Zhang, Chen Chen, Yang Li, Wenhui Ma, Hongwei Ni   +6 more
doaj   +1 more source