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J. Cent. South Univ. (2020) 27: 1395-1403 DOI: https://doi.org/10.1007/s11771-020-4375-1 Catalytic effect of silver-bearing solid waste on chalcopyrite bioleaching: A kinetic study LIAO Rui(廖蕤)1, 2...; kinetics Cite this article as: LIAO Rui, WANG Xing-xing, YANG Bao-jun, HONG Mao-xing, ZHAO Hong-bo, WANG Jun, QIU Guan-zhou. Catalytic effect of silver-bearing solid waste on chalcopyrite bioleaching......
Surface structure and catalytic activity of electrodeposited Ni-Fe-Co-Mo alloy electrode by partially leaching Mo and Fe LUO Bei-ping(罗北平)1, 2, GONG Zhu-qing(龚竹青)3, REN Bi-ye(任碧野)2, YANG... were analyzed by EDS, SEM and XRD. The polarization curves of the different electrodes show that the catalytic activity of electrodes is strongly correlated with the mole fraction of alloy elements......
J. Cent. South Univ. (2020) 27: 1176-1185 DOI: https://doi.org/10.1007/s11771-020-4358-2 Preparation of magnetic Fe3O4@Cu/Ce microspheres for efficient catalytic oxidation co-adsorption of arsenic... solvothermal approach and further utilized to remediate toxic arsenic (As(III)) pollution. The effects of Cu/Ce elements co-doping on the crystal structure, catalytic oxidation and adsorption......
砷(Ⅲ)-碘酸钾-中性红体系催化动力学荧光光度法测定痕量砷朱仁和1,陈兰化1(1.安徽省淮北市淮北师范大学化学与材料科学学院)摘 要:在H2SO4介质中,痕量As(Ⅲ)对碘酸钾氧化中性红的反应具有显著的催化作用,使其荧光强度减弱,据此提出了动力学荧光法测定As(Ⅲ)的新方法.详细研究了中性红,碘酸钾和硫酸的用量以及反应温度和时间对As(Ⅲ)测定的影响.结果表明,在最佳条件下,砷的质量浓度在2.0~600μg/L范围内与溶液荧光强度的改变值呈良好的线性关系,检出限为0.6μg/L.本法用于环境水样中As(Ⅲ)的测......
Micellar sensitized catalytic kinetic spectrophotometry for highly accurate and reproducible determination of Ⅴ(Ⅳ) and Ⅴ(Ⅴ)Ramazan Grkan,Can EmektasDepartment of Chemistry,Faculty of Sciences,University of Cumhuriyet摘 要:A highly accurate and reproducible micellar sensitized kinetic method was proposed for determination of V(VI). The method is based......
(Ⅲ)是一级反应,其表观活化能为12.44 kJ/mol.试验了40多种共存离子的影响,大多数的常见离子不干扰.方法用于贵金属精矿中钌的测定,测定值与推荐值一致,相对标准偏差(RSD)为2.2%~2.6%,加标平均回收率为98%~99%(n=6). 关键词:钌; 高碘酸钾; 催化动力学光度法; 吉氏色素; ruthenium(Ⅲ); potassium periodate; catalytic kinetic spectrophotometry; Giemsa pigment; [全文内容正在添加中] ......
曙红B分光光度法测定痕量铋(Ⅲ)凌立新1,王林1(1.重庆市 重庆文理学院化学与环境工程学院)摘 要:在硫酸介质中,铋(Ⅲ)对碘酸钾氧化生物染料曙红B的褪色反应有强烈催化作用,据此建立了测定痕量铋(Ⅲ)的催化动力学方法.反应最优实验条件:在25 mL测定体积中,2.0×10-3 mol/L曙红B用量为1.2 mL,1.0×10-2 mol/L碘酸钾用量为1.5 mL,反应温度为90℃.在优化条件下,体系催化反应和非催化反应的吸光度变化值(ΔA)与铋(Ⅲ)质量浓度在0~0.18μg/mL范围内呈良好线性关系.方法......
微波消解-亮绿SF-过氧化氢体系催化动力学光度法测定铜尾矿中痕量铜(Ⅱ)陈宗保1,蔡恩钦2,谢建鹰1(1.江西省上饶市上饶师范学院化学系2.广丰环保局环境监测站,江西广丰 334001)摘 要:研究了在稀HNO3介质中,以十六烷基三甲基溴化铵(CTMAB)表面活性剂为增敏剂,痕量铜(Ⅱ)可催化过氧化氢氧化亮绿SF褪色,据此建立了催化动力学光度法测定痕量铜的新方法.对分析方法进行优化,确定褪色检测波长为635nm.同时,建立了反应动力学方程,确定此反应对亮绿SF试剂为零级反应,对痕量铜为一级反应.在最优化条件下,......
Heteroepitaxy and Kinetic Study of GaAs/Ge/GaAs Multilayer MaterialZhang Xiafang Peng Ruiwu Jiang Wenda Shanghai Institute of Metallurgy,Academia Sinica,Shanghai,China 200050摘 要:catalytic effect of Ge.The growth mechanism of Ge/GaAs is temperature dependent.WhenT around 800~700℃,it is con-trolled by diffusion transport and when t<......
镧(Ⅲ)-8羟-基喹啉-曙红Y体系催化动力学荧光光度法测定镧汞齐中痕量镧陈娟平1,柳玉英1,高英杰1(1.山东省淄博市山东理工大学化学工程学院)摘 要:在醋酸-醋酸钠缓冲溶液中,曙红Y于特定的激发波长下可以发射较强的荧光光谱,加入少量的8-羟基喹啉后,体系的荧光强度明显增强,而乳化剂OP的加入可以使荧光强度进一步加强,若在以上体系中加入痕量镧(Ⅲ)离子,荧光强度会继续加强,镧(离子在该体系中起到了催化剂的作用.据此建立了一种测定痕量镧(Ⅲ)的新体系.文中讨论了酸度,反应温度,反应时间,试剂用量及共存离子的影响,......
