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Preparation of boric acid from low-grade ascharite and recovery of magnesium sulfate LI Jie(李 杰)1, FAN Zhan-guo(樊占国)1, LIU Yan-li(刘艳丽)1, LIU Su-lan(刘素兰)1, JIANG Tao(姜 涛)1, XI Zheng...; accepted 19 January 2010 Abstract: Boric acid and kieserite were prepared from low-grade ascharite by sulfuric acid method. This method results in the recovery of 71.06% and 45.03% for boric acid......
and acid mine drainage environment protection LIAO Rui(廖蕤)1, 2, YU Shi-chao(于世超)1, 2, WU Bai-qiang(邬柏强)1, 2, ZHAO Chun-xiao(赵春晓)1, 2, LIN Hao(林豪)1, 2, HONG Mao-xin(洪茂鑫)1, 2, WU Hai-yan(武海艳)1, YANG Cong-ren(杨... have caused serious environmental problems such as acid mine drainage (AMD). The understanding of some common sulfide minerals bioleaching processes and protection of AMD environment is reviewed......
J. Cent. South Univ. (2020) 27: 3821-3838 DOI: https://doi.org/10.1007/s11771-020-4473-0 Performance evaluation of nano-silica and silica fume on enhancing acid resistance of cement-based... acid resistance of mortar mixtures. The NS and SF were added as substitutions for cement at various dosages. The cured samples were immersed in the sulfuric acid solution with a pH of 2 for 75 d......
Pressure leaching of zinc silicate ore in sulfuric acid medium LI Cun-xiong(李存兄), XU Hong-sheng(徐红胜), DENG Zhi-gan(邓志敢), LI Xing-bin(李兴彬), LI Ming-tin(李旻廷), WEI Chang(魏 昶) Faculty... and the results showed that zinc exists mainly as hemimorphite and smithsonite in the sample. Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric......
Microbial aspects of acid mine drainage and its bioremediation K.A. NATARAJAN Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India Received... abandoned mines and processed waste tailings in the generation of acid mine drainage and toxic metal dissolution was discussed. Mechanisms of acid formation and dissolution of copper, zinc, iron and arsenic......
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Solvent extraction equilibrium of dysprosium(Ⅲ) from nitric acid solutions with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester HUANG Ying1, 2, TANAKA Mikiya1 1. Research..., the development of a chemically based model applicable to high concentration is desired. In the present study, the equilibrium distribution of dysprosium(Ⅲ) between an aqueous nitric acid solution......
ARTICLE J. Cent. South Univ. (2019) 26: 343-352 DOI: https://doi.org/10.1007/s11771-019-4006-x Isolation of an acid producing Bacillus sp. EEEL02: Potential for bauxite residue neutralization WU... wasteland representing extreme hostile environment with increased alkalinity. Microbially-driven neutralization of bauxite residue, based on the microbial acid producing metabolisms, is a novel......
effect of modified humic acid binder on pelletisation of specularite concentratesZHOU You-lian(周友连), ZHANG Yuan-bo(张元波), LIU Bing-bing(刘兵兵), LI Guang-hui(李光辉), JIANG Tao(姜涛) (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)Abstract:A modified humic acid (MHA) binder was tested as a substitute for bentonite to prepare qualified specularite......
J. Cent. South Univ. (2016) 23: 39-43 DOI: 10.1007/s11771-016-3046-8 Kinetic study on leaching of nickel from Turkish lateritic ore in nitric acid solution Tevfik AGACAYAK, Veysel ZEDEF, Ali ARAS... of nickel from lateritic ore in nitric acid solution was investigated. Experimental parameters used were stirring speed (100-600 r/min), temperature (40-96 °C), nitric acid concentration (0.1-2 mol/L......