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Your search keyword '"Yang, Ke-di"' showing total 9 results
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9 results on '"Yang, Ke-di"'

3. Automatic phantom-less QCT system with high precision of BMD measurement for osteoporosis screening: Technique optimisation and clinical validation

Author

Liu, Zhuo-Jie, primary, Zhang, Cheng, additional, Ma, Chi, additional, Qi, Huan, additional, Yang, Ze-Hong, additional, Wu, Hao-Yu, additional, Yang, Ke-Di, additional, Lin, Jun-Yu, additional, Wong, Tak-Man, additional, Li, Zhao-Yang, additional, Li, Chun-Hai, additional, and Ding, Yue, additional

Published
2022
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6. Leaching Kinetics of Pyrolusite by Macromolecular Melanoidins of Molasses Alcohol Wastewater in H2SO4

Author

Wen Yan-xuan, Su Jing, Yang Ke-di, LV Yi-ju, Lv Xiao-Yan, and SU Hai-feng

Subjects
inorganic chemicals, Pyrolusite, Order of reaction, Reducing agent, Kinetics, Inorganic chemistry, technology, industry, and agriculture, chemistry.chemical_element, Sulfuric acid, General Medicine, Manganese, engineering.material, equipment and supplies, complex mixtures, chemistry.chemical_compound, chemistry, Wastewater, engineering, Leaching (metallurgy), Engineering(all)
Abstract

The kinetics of reductive leaching of manganese from low grade pyrolusite using melanoidins of molasses alcohol wastewater as reducing agent in dilute sulfuric acid was investigated. The shrinking core model was applied to quantify the effects of reaction parameters on leaching rate of manganese. The leaching rate increases with the increase of the leaching temperature, sulfuric acid concentration and melanoidins concentration and the decreases of the particle size of pyrolusite. The leaching process follows the kinetics of a shrinking core model and the apparent activation energy is 56.2 kJ·mol -1 . The experimental results indicate a reaction order of 0.54 for sulfuric acid concentration and 0.93 for melanoidins concentration. It is concluded that the reductive leaching of pyrolusite with macromolecular melanoidins of molasses alcohol wastewater is controlled by the diffusion through the ash/inert layer composed of the associated minerals.

Published
2011

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