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seawater
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  海水
    Researches on Heavy Metal Ion Selective Sensors and Application for Seawater Analysis
    重金属离子选择传感器及其在海水分析中应用的研究
短句来源
    Researches on Heavy Metal Electrochemical Sensors and Their Application in Seawater Analysis
    重金属电化学传感器及其在海水检测中应用的研究
短句来源
    FURTHER STUDIES ON THE DETERMINATION OF NITRATE IN SEA WATER WITH BSPB
    应用BSPB测定海水中硝酸盐的进一步研究
短句来源
    A STUDY OF THE MUTUAL NON-INTERFERENCE EFFECT OF INORGANIC ION EXCHANGE IN SEAWATER Ⅰ. Ion Exchange Reactions of U(Ⅵ),Cr(Ⅱ),Ca,Mg with Hydrous Titanium Oxide in Seawater
    海水中无机离子交换的互不相干作用 Ⅰ.海水中U(Ⅵ)、Cr(Ⅱ)、Ca、Mg与水合氧化钛的离子交换反应
短句来源
    DETERMINATION OF SULFIDE IN SEA WATER BY ELECTROCHEMICAL MEMBRANE SULFIDE ELECTRODE
    应用电化膜硫电极测定海水中的硫化物
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  海水
    Researches on Heavy Metal Ion Selective Sensors and Application for Seawater Analysis
    重金属离子选择传感器及其在海水分析中应用的研究
短句来源
    Researches on Heavy Metal Electrochemical Sensors and Their Application in Seawater Analysis
    重金属电化学传感器及其在海水检测中应用的研究
短句来源
    FURTHER STUDIES ON THE DETERMINATION OF NITRATE IN SEA WATER WITH BSPB
    应用BSPB测定海水中硝酸盐的进一步研究
短句来源
    A STUDY OF THE MUTUAL NON-INTERFERENCE EFFECT OF INORGANIC ION EXCHANGE IN SEAWATER Ⅰ. Ion Exchange Reactions of U(Ⅵ),Cr(Ⅱ),Ca,Mg with Hydrous Titanium Oxide in Seawater
    海水中无机离子交换的互不相干作用 Ⅰ.海水中U(Ⅵ)、Cr(Ⅱ)、Ca、Mg与水合氧化钛的离子交换反应
短句来源
    DETERMINATION OF SULFIDE IN SEA WATER BY ELECTROCHEMICAL MEMBRANE SULFIDE ELECTRODE
    应用电化膜硫电极测定海水中的硫化物
短句来源
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  “seawater”译为未确定词的双语例句
    INVESTIGATION OF TURBULENCE DIFFUSION IN SEA WATER AT QINGDAO SEACOAST BY MEANS OF THE“LGC2-1A”TOWED FLUOROMETER AND FLUORESCENCE DYESTAFF
    利用“LGC2—1A”水中荧光计和荧光染料试验研究近岸海水的湍流扩散
短句来源
    FRACTAL STUDY OF LIQUID-SOLID INTERFACIAL INTERACTION IN SEAWATER Ⅰ. Application of SAXS for Determining the Surface Fractal Dimension of Solid Exchanger
    海洋中液-固界面作用的分形研究Ⅰ.SAXS法测量固体交换剂的分维
短句来源
    Monitoring of a oil pollution case in seawater aquaculture area of Nanpu Bay Huian
    惠安南埔湾海水养殖区一次油污染的监测
短句来源
    A NEW MICROFILTER FOR SEA WATER QUALITY MONITOR
    海洋水质监测用新型过滤器的研制
短句来源
    Study on the affect of the drying up of the Yellow River on the ecological environment in the seawater near the delta
    黄河断流对三角洲附近海域生态环境影响的研究
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  seawater
(5) An abnormal phenomenon was found when the Gibbs solution adsorption was applied to the seawater system, the reason for which was discussed preliminarily.
      
Aragonite observed in the prismatic layer of seawater-cultured pearls
      
The prismatic layer is obviously different from the parallel layer in seawater-cultured pearls.
      
X-ray diffraction (XRD), optical microscopy (OM) and micro-infrared (IR) spectroscopy have been applied to characterize the crystallized layers of high- and low-quality seawater-cultured pearls produced in South China.
      
Three types of prisms were found in seawater-cultured pearls: calcite prism, aragonite prism and calcite and aragonite prism.
      
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In this paper, a noval process for extraction of potassium from seawater at constant temperature with the Chinese natural zeolite as adsorbent is described. The result is as follows: both 3.5N NH4Cl and mixed NH4C1-NaCl solution (NH4C1 3.5N, NaC1 2.8N) are effective scrubbing agents of K+, but the NH-type zeolite, or else the quantity of NH which is carried away by sea-water would be too great. In order to depress the lose of ammonia, technological experiments are conducted to test the effects of modification...

In this paper, a noval process for extraction of potassium from seawater at constant temperature with the Chinese natural zeolite as adsorbent is described. The result is as follows: both 3.5N NH4Cl and mixed NH4C1-NaCl solution (NH4C1 3.5N, NaC1 2.8N) are effective scrubbing agents of K+, but the NH-type zeolite, or else the quantity of NH which is carried away by sea-water would be too great. In order to depress the lose of ammonia, technological experiments are conducted to test the effects of modification methods of zeolite: single stages modification with different ratio of scrubbing agent and modifying agent. An effective process for depressing ammonia loss at constant temperature have been obtained, when natural zeolite used as K+ adsorbent at constant temperature, the NaHCO3 mother liquid of Solvay-soda process, after stripping off NH3, may be taken as scrubbing agent. Extraction of potassium is combined with hot ammonium chloride process, such technological scheme is rational from the standpoint of economics and technology. The main technical characteristics are: effective adsorption capacity of K+ by zeolite=13kg K+/Ton, production rate of Zeolite=0.271 kg K+/Ton. hr, ammonia loss is dependent upon the ratio of the quantity of extracted K+and Na2CO3 is varied from 5 to 59kg NH3/Ton.KC1, Scrubbed solution K+ varied from 19 to 20 g/l; composition of mixed NH4C1-KCl fertilizer is NH4Cl:KCl=3.17~3.27:1.

本文以国产天然沸石为吸附剂,研究在常温下进行海水提钾的新工艺。试验表明:3.5N左右的 NH4Cl 洗脱剂或 NH4Cl—NaCl混合洗脱剂(NH4Cl3.5N; NaCl2.8N) 均有较强的洗脱K+的能力。但NH型沸石需再用饱和盐水改型,回收柱上的NH,否则在海水吸附钾时随海水流失的NH量太大。为了降低氨的损耗,工艺试验着重在改型上进行多方面的探索和考察:用盐水一次改型、分段改型(洗脱剂与改型剂不同配比时的分段改型)。最终提出了有效降低氨耗的常温洗脱的工艺路线,即以天然沸石为吸附剂,在常温下以滤碱脱氨母液为洗脱剂,将海水提钾与热法联碱工业相结合的新途径。工艺流程的安排在经济上较为合理,在技术上是可行的。小试达到的主要技术指标为:沸石对钾的有效吸附容量:13公斤K+/吨沸石;沸石生产强度:0.271公斤K+/吨·小时;氨耗系由提钾与制碱的比例而定,可控制在5~59公斤氨/吨氯化钾;洗脱液K+含量19~20克/升;所得NH4Cl-KCl混肥的组成:NH4Cl与KCl之比为3.17~3.27:1。

A new method of dearsenization polluted water by means of magnesium salts from seawater is developed-dearsenization by Magnesium Salts. This method has the advantages of high efficiency and low cast, so it suit coastal industries for their sewage disposal. The influence of arsenic content, the valency state of arsenic, magnesium salt content, the ratio between magnesium and arsenic and the nature of the medium upon dearsenization has been examined. The most favorable condition for dearsenization...

A new method of dearsenization polluted water by means of magnesium salts from seawater is developed-dearsenization by Magnesium Salts. This method has the advantages of high efficiency and low cast, so it suit coastal industries for their sewage disposal. The influence of arsenic content, the valency state of arsenic, magnesium salt content, the ratio between magnesium and arsenic and the nature of the medium upon dearsenization has been examined. The most favorable condition for dearsenization were. found to be pH 9.5-10.5, Mg: As 8-12. Polluted water containing arsenic as high as 600 mg/l can be dearsenized with the efficiency of more than 99%. Trivalent arsenic appears to be dearsenized less easily than pentavalent arsenic. In order to decrease the amount of magnesium salt used and improve the efficiency of dearsenization, technological processes of stepwise dearsenization by magnesium saits, dearsenization by magnesium salts after the trivalent arsenic being oxidized and the removal of the residual arsenic by magnesium salts containing Fe or phosphate were studied. Conditions for dearsenizing polluted water containing about 200 mg As/l to an arsenic content conforming that of the national standard (0. 5 mg As/l) were obtained. An enlarged experiment on a 5 lsample was also made with the same satisfa- ctory resoult. Aiming at minimizing environmental pollution by way of "disposing of wastes by wastes", experiments using the waste residue discharged from soda plants-to the sea-caustic mud-to take the place of lime in dearsen- ization have also been carried out. Results prove that caustic mud not only can satisfactory take the place of lime, but also lowers the cost and increases the efficiency of dearsenization. Instead of magnesium salts from seawater, the by-product from salt- works, solid bitterm, has also been used. Satisfactory results of dearsenization have also been obtained.Thus, it is made possible for the inland plants, where sea-water is hardly avaliable, to dearsenize arsenic-containing wastewater by magnesium salts.

本试验研究了一种利用价廉易得的海水中的镁盐来脱除污水中无机砷的新方法──镁盐脱砷法。试验结果表明;脱砷比较彻底,成本也较低廉,很适于临海工厂使用。 试验考查了污水中砷含量、砷的价态、镁砷比以及介质条件等因素对脱砷效果的影响。找出了在pH为 9.5-10.5,镁砷比为8-12时脱砷效果最好。三价砷比五价砷较难脱除。利用分段镁盐脱砷、氧化镁盐脱砷及混合镁盐脱砷均可降低镁盐用量和提高脱砷效率。同时,还进行了五升规模的扩大试验。 试验还考查了利用碱厂废渣苛化泥代替石灰及利用盐场副产的卤块代替海水提供镁盐来进行脱砷,也获得了同样良好的脱砷效果。

A new method of determination of dissolved oxygen in seawater using oxygen electrode without a membrane has been made. Differing from Clark cell, a new model for dissolve cxygen probe has been designed with the following features:( 1 ) Without a gaseous diffusion semi-permeable membrane.( 2 ) Provided with two gold cathode electrodes (a disc and a ring) anda ring anion exchange membrane. ( 3 ) Autometic inlet of sample water into the probe not interfered by air.By means or this modificatitn, the stability...

A new method of determination of dissolved oxygen in seawater using oxygen electrode without a membrane has been made. Differing from Clark cell, a new model for dissolve cxygen probe has been designed with the following features:( 1 ) Without a gaseous diffusion semi-permeable membrane.( 2 ) Provided with two gold cathode electrodes (a disc and a ring) anda ring anion exchange membrane. ( 3 ) Autometic inlet of sample water into the probe not interfered by air.By means or this modificatitn, the stability of the probe is increased and hysteresis decreased. The determination procedures and calibration are described, The method is fast (a sample/2min) and accurate (±1-1.5%) and can be satisfactorily used in the lab on ship.

本文叙述了用脱膜氧电极—恒电位时安法测定海水溶解氧的步骤及影响因素等。此法有快速(一个水样/分)、准确(±1%)的特点,可用于海洋调查船实验室。

 
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