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Preparation and electrochemical behaviour of Ti/Mn_(2)O_(3)coating anode

Rare metals 2023年第7期42卷 2197-2203页

作者： Fa-Ming Xie Lin Tian Chuan-Bin Li Xue-Tao Yuan Yan-Xi Yin GRINM Resources and environment Tech.Co. LtdBeijing101047China national engineering research center for environment-friendly metallurgy in producing premium non-ferrous metals Beijing101047China China General research Institute for nonferrous metals Beijing100088China Beijing engineering research center of Strategic nonferrous metals Green Manufacturing Technology Beijing101047China

Owing to the excellent electrocatalytic activity,corrosion resistance and high cell potential of the dimensionally stable anodes(DSA),DSAs have great application potential in metallurgical electrolysis *** this resear... 详细信息

关键词： coating corrosion resistance

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Kinetics, thermodynamics, and equilibrium of As(Ⅲ),Cd(Ⅱ), Cu(Ⅱ) and Pb(Ⅱ) adsorption using porous chitosan bead-supported MnFe_(2)O_(4) nanoparticles

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International Journal of Mining Science and Technology 2021年第6期31卷 1107-1115页

作者： Hongxia Li Hongbing Ji Xinglan Cui Xiaokui Che Qidong Zhang Juan Zhong Rongzhen Jin Lei Wang Yi Luo national engineering research center for environment-friendly metallurgy in producing premium non-ferrous metals GRINM Resources and Environmental Technology Corporation LimitedBeijing 101407China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijing 100083China GRINM Group Corporation Limited Beijing 100088China GRIMAT engineering Institute Corporation Limited Beijing 100088China

A novel porous nanocomposite,cross-linked chitosan and polyethylene glycol(PEG) bead-supported MnFe_(2) O_(4) nanoparticles(CPM),was developed as an efficient adsorbent to remove metalloid(As(Ⅲ))and heavy metals(Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ)).The characteristics of CPM showed a porous structure,well dispersed MnFe_(2) O_(4),and several of hydroxyl and amino groups(-OH,-NH_(2)).Batch experiments demonstrated that the best adsorption property of As(Ⅲ),Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ) was achieved within 8 h with maximum adsorption capacities of 9.90,9.73,43.94,and 11.98 mg/g,*** and synergistic effects(particularly precipitation) were included in the co-adsorption mechanism of As(Ⅲ) and heavy ***,As(Ⅲ) was partly oxidized by MnFe_(2) O_(4) to As(V),and both were coordinated on MnFe_(2) O_(4) ***(Ⅱ) could also bind to MnFe_(2) O_(4) by ion exchange and electrostatic ***,Cd(Ⅱ) and Cu(Ⅱ) tended to be coordinated on ***,CPM can serve as a remediation material for water and soil co-contaminated with As(Ⅲ) and heavy metals.

关键词： Equilibrium Adsorption Arsenic Cadmium Chitosan MnFe_(2)O_(4)nanoparticles

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Application of response surface methodology in optimization of bioleaching parameters for high-magnesium nickel sulfide ore

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Journal of Central South University 2022年第5期29卷 1488-1499页

作者： SUN Jian-zhi WU Biao CHEN Bo-wei WEN Jian-kang GRINM Resources and environment Tech.Co. Ltd.Beijing 101407China GRIMAT engineering Institute Co. Ltd.Beijing 101407China national engineering research center for environment-friendly metallurgy in producing premium non-ferrous metals Beijing 100088China GRINM Group Co. Ltd.Beijing 100088China

The response surface methodology(RSM)was used to optimize the operating parameters during the bioleaching of Jinchuan high-magnesium nickel sulfide *** particle size,acid addition,pulp density and inoculation amount were chosen as the investigated *** maximize the leaching efficiency of nickel,copper,cobalt and minimize the dissolution of magnesium and iron ions,the model suggested a combination of optimal parameters of particles less than 0.074 mm being 72.11%,sulfuric acid addition being 300 kg/t,pulp density being 5%and inoculation amount being 12.88%.Under the conditions,the average results of three parallel experiments were 89.43%of nickel leaching efficiency,36.78%of copper leaching efficiency,84.07%of cobalt leaching efficiency,49.19%of magnesium leaching efficiency and 0.20 g/L of iron *** model indicated that the most significant factor in response of the leaching efficiency of valuable metal is the particle size,and the most significant factor in response to the leaching efficiency of harmful ions(Mg2+)is the amount of sulfuric acid *** according to the suggested models,no significance of the interaction effect between particle size and acid addition was *** the optimized parameters suggested by models,the valuable metals could be separated from harmful ions during the bioleaching process.

关键词： high-magnesium nickel sulfide ore bioleaching response surface methodology particle size acid consumption

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