氧化锌

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

The contents of organic matter, total nitrogen, phosphorus, iron, manganese, copper, zinc can be increased, and the contents of hydrolizable nitrogen and their forms , Fe-P, Al-P, Ca〓-P, all organic P forms, exchangeable and organic iron, manganese, copper, zinc are increased obviously in long-term application organic manure soil. Not only the contents of soil readily oxidizable carbon, humic acid, fuluic acid, and HA/FA value are increased and Kos value decreased but also the available nitrogen, phosphorus, iron, manganese, copper, zinc are kept more high level in the organic manure soils. Long-term mulching straw has similar role with organic manure for soil nutrient except for decreasing total phosphorus, available P, N and Ca〓-P, but its fertilizer efficiency is not better than organic manure.

有机肥还具有提高土壤易氧化碳和松结态腐殖质含量，降低kos值，提高土壤HA、FA含量及其比值的作用，使土壤中有效态氮、磷、铁、锰、铜和锌含量处于中上等水平；长期秸秆还田除了不增加土壤全磷、有效氮和磷等外，对其他养分的作用效果与有机肥相似，但其肥效不如有机肥；长期氮磷化肥单施，土壤全氮和磷增加，有机质、铁、锰、铜和锌含量下降，易氧化碳、松结态腐殖质、HA和FA含量、kos和HA/FA值下降；长期不施肥土壤有机质、全氮等养分处于消耗状态。

The growth rate at different growth stages of tetrapod ZnO was determined by the "time mark" experiments and the morphologies formed under different conditions were examined by scanning electronic microscope.

锌蒸气的氧化动力学研究已经揭示：在一定的氧化条件下，锌蒸气中存在凝聚生长的锌液滴与气态锌原子的动态平衡，由此导致了不同形貌的结晶体[1， 2]。

Methods: Zinc has catalysis ability in the system of oxidze xylenol orange in medium, and the discoloration extent of methyl orange has a linearity to the content of zinc. Based on this fact, a new photometric method for the determination of zinc was proposed.

在H2SO4介质中，微量锌对过氧化氢氧化二甲酚橙的反应体系具有催化作用，且二甲酚橙被氧化后的褪色程度ΔA与微量锌的含量有线性关系，据此建立了二甲酚橙褪色光度法测定微量锌的新方法。

Whatever the Zn/H_2O_2 ratio is, there is only chestnut bur-like structure appeared after thermal oxidation at 850℃for 8h. DSC-TG results showed that while the content of the ZnO film shell on the zinc nanoparticle surface is about 50.4%, the melting and oxidation processes happened almost at the same time during the thermal oxidation process and the bushiest ZnO nanoneedles can be formed.

DSC-TG分析结果表明，纳米锌粉表面保护膜质量占到颗粒质量的50.4%时，热处理阶段氧化过程和熔化过程几乎同时发生，生长的ZnO针状产物最为茂密；对于微米锌粉，H_2O_2预氧化处理对其热行为及其最后形貌生长都影响不大，热氧化阶段是其控制阶段。

SEM and XRD results showed that the bushiest ZnO nanoneedles can be obtained after using H_2O_2 pre-oxidization at the Zn/H_2O_2 ratio of 20mg/ml and themal oxidation at 650℃for 2h and ZnO nanoparticles at the Zn/H_2O_2 ratio of 2mg/ml, and the morphologies were evolved from nanoneedles to nanoparticles between the two Zn/H_2O_2 ratios.

SEM和XRD分析表明，当在预氧化阶段Zn/H_2O_2为20mg/ml时，650℃热氧化2h后纳米锌粉氧化成茂密针状ZnO，当Zn/H_2O_2为2mg/ml时，生成颗粒状ZnO，处于中间浓度时，针状结构依次减少；预氧化微米锌粉无论Zn/H_2O_2比例为多少，850℃热氧化8h后的产物都为栗状ZnO。

The company's operating range: 1, barrel plating white zinc, color zinc, blue zinc, black zinc, yellow zinc,üzinc, nickel-plated roller, Qing-hong Gu, roll on behalf of chromium, etc.; 2, linked to light-plated nickel, bright chrome, sand nickel, pearl nickel, pearl envelope, Tsing ancient, red ancient, imitation gold, K gold, alluvial gold sweep, pearl silver, etc.; 3, plastic (ABS, PC, PC + ABS, PE, etc.), resin plating; 4, aluminum alloy oxidation, coloring; 5, printed circuit board plating, electronic plating (tin, tin aluminum, gold, etc.); 6, plating for customers to develop new varieties; 7, metal, injection molding.

荣丰公司的经营范围：1、滚镀白锌、彩锌、蓝锌、黑锌、黄锌、军绿锌、滚镀镍、青红古、滚代铬等；2、挂镀光镍、光亮铬、沙镍、珍珠镍、珍珠络、青古、红古、仿金、K金、扫沙金、珍珠银等；3、塑胶（ABS、PC、PC+ABS、PE等）、树脂电镀；4、铝合金氧化、着色；5、印制电路板电镀、电子电镀；6、为客户开发新电镀品种；7、五金、注塑加工。

The zinc oxidation leaching ratio can reach 86.73% in 96h. The oxidation mechanisms of zinc sulphide concentrate in different suspension electrolysis solution are almost same. However, the exchange current density in the process of oxidation is low and it will quicken electrochemical oxidation with the increasement of temperature.

通过实验分析得出：硫化锌矿在不同悬浮电解溶液中都能够被氧化，但有较大的差别，在硫酸锌、硫酸铵和硫酸的悬浮电解液中，矿物明显被氧化而溶解进入悬浮液中，氧化速度比较快，锌的氧化溶出率在96h的时间内达到86.73％。

After the research of anodic oxidation slag, we got the composition of the suspension electrolyte of zinc sulphate solution. 2 The results of electrode kinetic of anodic oxidation showed that the electron transfer during the process of electrochemical oxidation was 1, and the electrochemical mechanism was: ZnS=Zn~(2+)+S~-+e Zn~(2+)+2S~-=ZnS + S~0 3 The flow sheet which can produce zinc according to suspension electrolysis principle in industry was put forward. 4 Elemental sulfur in oxidizing slag was recovered by distillation.

本文的创新点是： 1提出了以硫酸锌溶液为基础的悬浮电解液体系；通过对阳极氧化渣进行系统的分析研究，得出了硫化锌矿物的悬浮电解的电解液组成； 2通过阳极氧化电极过程动力学分析得到，电化学氧化过程中电子转移数为1，电化学机理为： ZnS=Zn~(2+)+S~-+e Zn~(2+)+2S~-=ZnS+S~0 3提出了工业上利用悬浮电解原理生产金属锌的工艺流程； 4对氧化渣中的元素硫采用蒸馏法原理进行回收。

The brightness of yellow brass flakes is upgraded by control of suboxidization reaction of peroxide and yellow brass flakes .

利用氧化的方法，控制过氧化氢与铜锌合金粉发生氧化反应，达到提高铜锌合金粉亮度的目的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。