- 更多网络例句与铅相关的网络例句 [注：此内容来源于网络，仅供参考]
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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。
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"Lead 铅",5,Lead in glass of cathode ray tubes, electronic components and fluorescent tubes.
2002/95/EC 阴极射线管、电子部件和发光管等玻璃内的铅含
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And then the effects of compositions on the mechanical performance, characteristic temperatures, thermal expansion and chemical stability of the glass were discussed. Researches on lead borate sealing glasses show that PbO/B2O3 ratio exerts the most important effect on glass network. ZnO is beneficial to stabilize the glass against devitrification . Bi2O3 has little effects on the sealing temperature, while it helps to adjust the thermal expansion coefficient of lead borate glasses in a definitive range. When 0.5～4 mol% GeO2 is introduced, the glass possesses the highest stability and lowest sealing temperature (400 ?C), which is desirable for low-temperature sealing.
通过对含铅的硼酸盐封接玻璃研究得出，PbO/B2O3比是影响玻璃网络最主要的因素；添加ZnO有助于增强玻璃的稳定性，抑制析晶；Bi2O3对高铅系列配方玻璃的封接温度影响不大，但可使铅硼系列玻璃体系的热膨胀系数在一定范围内可调；在高铅系列配方中，引入0.5～4mol%的GeO2可有效地抑制玻璃析晶，降低封接温度；最终获得了两种性能较好的低熔点铅硼酸盐封接玻璃配方，G3封接温度低达400℃，其PbO含量为54mol%左右，BL10玻璃的封接温度为440℃，但其铅含量大大降低，仅为36mol%。
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"Lead 铅",24,Lead in solders for the soldering to machined through hole discoidal and planar array ceramic multilayer capacitors.
EC 通孔盘状及平面阵列陶瓷多层电容器焊料所含的铅
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The main products are: maintenance-free battery grid of low-antimony, lead calcium alloy, lead antimony alloy, lead and cadmium alloys, electrolytic lead, refined lead, lead components of nuclear shielding, lead parts.
主要产品有：免维护蓄电池板栅低锑、铅钙系列合金、铅锑系列合金、铅镉合金、电解铅、精铅、核屏蔽铅构件、铅零件等。
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B:硫化铅斑渍中铅的定性分析 Test methods for analysis of lead in PVC taken from insulation and sheath of electric and optical fibre cables - Method A : total lead content determination with flame excitation atomic absorption spectrometry - Method B : qualitative analysis of lead by lead sulphide staining.
NF C32-039-2006 取自电缆和光缆绝缘材料和互套的聚氯乙烯中铅的分析用试验方法。方法A：用火焰激发原子吸收光谱测定法测定含铅总量。
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"Lead 铅",16,Lead in linear incandescent lamps with silicate coated tubes.
EC 管状白炽灯硅酸盐涂层灯管中的铅
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"Lead 铅",22,Lead as impurity in RIG Faraday rotators used for fibre optic communications systems.
EC 用於光纤通讯系统，以稀土铁石榴石晶体制成的法拉第旋转器中作为杂质的铅
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"Lead 铅",33,Lead in solders for the soldering of thin copper wires of 100 μm diameter and less in power transformers.
EC 涉及电源变压器中直径100微米及以下细铜线所用焊料中的铅
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"Lead 铅",31,Lead oxide in seal frit used for making window assemblies for Argon and Krypton laser tubes.
EC 用於氩和氪镭射管防护窗组合件的封装玻璃料里的铅的氧化物。
- 更多网络解释与铅相关的网络解释 [注：此内容来源于网络，仅供参考]
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lead azide：氮化铅,迭氮铅
醋酸铅 lead acetate | 氮化铅,迭氮铅 lead azide | 铅熔槽,铅浴 lead bath
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lead azide：氮化铅,叠氮铅
"醋酸铅","lead acetate" | "氮化铅,叠氮铅","lead azide" | "铅熔槽,铅浴","lead bath"
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lead acetate：乙酸铅,醋酸铅
lead铅;含铅的 | lead acetate乙酸铅,醋酸铅 | lead chromate铬酸铅
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plumbery：铅管业/铅管制造/铅工业
plumber /水管工人/ | plumbery /铅管业/铅管制造/铅工业/ | plumbic /铅的/
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leady：铅 铅色 似铅 含铅
leadworks 铅矿熔炼工厂 制铅工厂 | leady 铅 铅色 似铅 含铅 | leadyarn 铅毛
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leady matte：含铅冰铜,含铅锍
leady 铅,铅色,似铅,含铅 | leady matte 含铅冰铜,含铅锍 | leaf abscission 叶离现象=>落葉
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Methods for chemical analysis of lead and lead alloys Determination of thallium content：铅及铅合金化学分析方法 铊量的测定
铅及铅合金化学分析方法 锌量的测定 M... | 铅及铅合金化学分析方法 铊量的测定 Methods for chemical analysis of lead and lead alloys Determination of thallium content | 铅及铅合金化学分析方法 铝量的测定 Me...
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Methods for chemical analysis of lead and lead alloys Determination of zinc content：铅及铅合金化学分析方法 锌量的测定
铅及铅合金化学分析方法 银量的测定 Meth... | 铅及铅合金化学分析方法 锌量的测定 Methods for chemical analysis of lead and lead alloys Determination of zinc content | 铅及铅合金化学分析方法 铊量的测定 Met...
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Methods for chemical analysis of lead and lead alloys Determination of tellurium content：铅及铅合金化学分析方法 碲量的测定
铅及铅合金化学分析方法 硒量的测定 Me... | 铅及铅合金化学分析方法 碲量的测定 Methods for chemical analysis of lead and lead alloys Determination of tellurium content | 铅及铅合金化学分析方法 钙量的测定 ...
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Methods for chemical analysis of lead and lead alloys Determination of selenium content：铅及铅合金化学分析方法 硒量的测定
铅及铅合金化学分析方法 砷量的测定 Me... | 铅及铅合金化学分析方法 硒量的测定 Methods for chemical analysis of lead and lead alloys Determination of selenium content | 铅及铅合金化学分析方法 碲量的测定 M...