na2s

Na2S chemical method and EDTA titration method can identify compound amino acid chelates samples effectively .

Na2S化学法和EDTA滴定法可以有效地鉴定复合氨基酸螯合物。

The waste water produced in the leaching process can be purified by controlling the value of pH or adding Na2S .

工艺产生的废水在控制合适的pH值或通过添加硫化钠的方法，可以达标排放，满足污水综合排放要求。

By the reaction of Na2S with C.

在溶液中，Na2S与C。

Ab initio study of dissociation , total atomization energies and heats of formation for Na2S and NAS

NaS和Na2S分子解离能和生成热的从头算研究

A simple and feasible method Of Na2S precipitation was tested for such an ore to depress the effect Of copper ions upon flotation process .

对这种含铜离子较多的矿石采用简单易行的Na2S沉淀法消除了铜离子在浮选回路的影响。

With an increase in concentration of Na2S , the free corrosion potential of alloys turns to be more negative , while the corrosion rates decrease .

随着Na2S溶液浓度的增加，合金的自腐蚀电位负移，腐蚀倾向增大，但因表面有钝化膜生成，合金腐蚀速度呈减小趋势。

The Influence of AQ and Na2S on Wheat Straw Pulping and the Reaction Kinetics of β - O-4 Ether Structure

AQ和Na2S对麦草蒸煮及其β-O-4的醚键反应动力学的影响

GaAs surface was passivated using Na2S · 9H2O aqueous and various alcohol solutions ( ethanol and iso-propanol ) .

本文用Na2S·9H2O的水溶液及乙醇和异丙醇溶液对GaAs表面进行了钝化处理；

Some organic solvents were firstly used as sulfur passivation medium for Na2S and ( NH4 ) 2S to treat the GaAs surface .

首次尝试了用有机溶剂作为Na2S和（NH4）2S处理介质，对砷化镓表面进行硫钝化处理。

The results show that Na2S ( subscript x ) and its compound are excellent corrosion inhibitor for the corrosion system of reactor effluent air coolers .

结果表明，多硫化钠复合缓蚀剂是一种应用于反应流出物空冷器腐蚀系统的优良缓蚀剂。

According to the woring condition of rotary furnace to produce Na2S , the wear mechanism of grade I high alu-mina brick has been analyzed .

针对硫化碱（Na2S）回转炉的使用条件，重点分析了Ⅰ等高铝砖的损毁原因。V.C高；

In the process of electrolyzing Na2S at constant potential , electrolytic potential , temperature , alkalinity and additives all effect the conversion of S2 - .

在恒电位电解Na2S溶液过程中，电解电位、温度、碱度以及添加剂的种类都会对S2-的转化率产生一定的影响。

The ash content of black liquor gasification contained basic compounds like Na2CO3 , Na2S . The basic compounds mixed with circulation absorbing liquid from alkali adsorption tower .

黑液气化灰分含有碳酸钠、硫化钠等碱性物质，它们进入溶解室后，与来自碱吸收塔的循环吸收液混合，得到含有碳酸钠、硫化钠和氢氧化钠的碱性水溶液。

The photocatalytic activity of CdS could be greatly enhanced by loading NiS as cocatalyst and using Na2S / Na2SO3 as sacrificial reagents .

本文采用NiS为助催化剂，在Na2S/Na2SO3作牺牲试剂时CdS的光催化效率得到了很大的提高。

The obtained high concentration arsenic waste water is stripped using Na2S / NaOH as a stripping agent . Then recycle arsenic using electrowinning , and gain simple substance arsenic finally .

获得的高浓度含砷溶液用Na2S/NaOH作反萃取剂进行反萃取，再利用电积法从碱性高砷溶液中回收金属砷，最终达到回收单质砷的目的。

In these studies , a novel , effective strategy named " seed catalysis " has been discovered here to synthesize silver nanostructures with controllable morphology by using Na2S as control agent .

在研究中还发现了一种新的、高效的晶种催化作用策略，即采用Na2S作为控制剂来形貌可控制备银纳米材料。

The industrial experiment , in Dexing Copper Mine in2000 , showed that thioglycolic acid was a quality organic depressant , and could substitute Na2S completely as the depressant .

在江西德兴铜矿进行的选钼工业试验表明，巯基乙酸是一种优良的有机抑制剂，能完全取代硫化钠，同时能有效地降低选矿药剂成本。

Test result shows that the cast Ni-Mo alloy has good corrosion-resistance in yellow alkali with 60 % Na2S at 75 ℃, and it also has good synthetic mechanical properties and good castability .

试验结果表明，铸造Ni－Mo合金在60%Na2S、温度为75℃黄碱介质的苛刻条件下具有良好的耐蚀性能。这种合金还具有较好的综合机械性能与铸造性能。

This paper reported the preparation of pseudo-hexagonal ZnS nano-crystal powders used the hydrates of Zn ( OAc ) 2 and Na2S by modified solid-state method at room temperature .

以硫化钠与醋酸锌为原料，采用改进的室温（湿）固相合成法制备硫化锌纳米晶。

The maximum temperature improved , and the times extend at maximum temperature and the concentration of Na2S and the concentration of lignin in black liquor increased can enhance the selectivity of the fast growing eucalyptus cooking delignification .

提高黑液预处理的保温温度、延长预处理的保温时间、增加预处理黑液中硫化钠浓度和木素成分的浓度都能不同程度的改善速生桉硫酸盐法蒸煮脱木素选择性。

Gold in the calcine can be leached out directly by polysulfide solution . The effects of temperature , time , S0 / Na2S molar ratio and concentration of Na2S on gold leaching were investigated .

研究了用多硫化物溶液直接浸出焙砂中的金，考察了温度、时间、S￣0／Na2S分子比。硫化钠浓度等因素对金浸出率的影响。

The relationship between the absorbing capacity of Na2S in smithsonite surface with stirring time and temperature is discussed . Dynamical equation of smithsonite heating surface sulfurized flotation is deduced , and the dynamical process and principle is analyzed .

考察了温度和硫化钠用量对菱锌矿浮选回收率的影响，研究了Na2S在菱锌矿表面上吸附量与温度和搅拌时间的关系，推导了菱锌矿加温硫化浮选过程动力学方程式，分析了其过程和原理。

The result of the research showed : With the pretreatment temperature rising , and time at maximum temperature extending , and Na2S , NaOH and lignin in black liquor increasing , the yield , K number and viscosity of pulp decreasing .

随着黑液预处理温度的升高、保温时间的延长、黑液中硫化钠和氢氧化钠浓度的增加和黑液中木素成分的增加，纸浆的得率、高锰酸钾值和粘度都有下降的趋势。

Unlike the ionic precursors such as Na2S and H2S , TAA could diffuse into the cationic-exchangeable ionomer membranes much more uniformly , Which led to the homogeneous distribution of CdS nanoparticles in the Nafion membranes .

与文献报道的前驱体如Na2S和H2S不同，TAA可以在全氟磺酸离子膜中均匀扩散，最终在Nafion薄膜中得到均匀分布的纳米CdS晶体。

After the study , the utilization of lye change consists of production of alkali sulfide with evaporation process for industry purpose , extracting Na2S after crystallisation , paper pulp making , regenerating lye with precipitation measure and recycling naphthenic acid with neutralization method .

通过研究，综述了炼油废碱液的利用技术主要有熬制工业硫化碱、结晶提取Na2S、废碱液造纸制浆、沉淀法再生废碱液和中和法回收环烷酸等。

In the presence of non ionic surfactant , Tween-80 , a new flow-injection catalytic spectrophotometric method for the determination of se lenium (ⅳ) based on its catalysis to the reduction of gallocyanine ( GC ) by Na2S was established .

利用非离子表面活性剂存在下的胶束催化作用，硒（Ⅳ）对Na2S还原培花青（GC）有强催化作用，建立了流动注射催化光度法测定硒（Ⅳ）的新方法。

Experimental study on the technological process and treatment efficiency of heavy metal chelating agent in treating fly ash from MSW incinerator , and compared with the results of inorganic chemical agents such as Na2S and lime used in treating this kind of hazardous waste have been conducted .

对利用重金属螯合剂处理城市垃圾焚烧飞灰的药剂稳定化工艺及处理效果进行了实验研究，并与Na2s和石灰等效果进行了比较。

Different precipitants are used to do parallel precipitation test on wastewater containing lead which is producing oxalic . The result indicates using Ca ( OH ) 2 and Na2S as precipitants to treat this type wastewater can improve the capability of sedimentation and filtration of the deposit .

采用不同沉淀剂对草酸铅化废水进行平行沉淀试验，表明在满足除铅效果前提下，以Ca（OH）2与Na2S为沉淀剂处理该废水可改善沉淀物的沉降和过滤性能。

About silver floatation from lead and silver dreg , Affiliating Na2S to modify mineral superficial configuration and quality , to reduce infection of Zn2 + in floatation . The better condition is researched . The reclaim rate is advanced about 11.71 percent in primary enrichment .

铅银渣的银浮选作业中，加人硫化钠改造有用矿物表面结构与性质，同时降低流程中Zn2+影响，探索了较佳的工艺条件，粗选条件下比目前生产条件提高回收率11.71%。