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硝酸盐     
相关语句
  nitrate
    The Study of the Nitrate Removal in Groundwater Using Extractive Membrane Bioreactor
    萃取膜生物反应器去除地下水硝酸盐研究
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
    ELIMINATION OF HARDNESS AND NITRATE FORM DRINKING WATER BY THE CARIX ION EXCHANGE PROSS
    CARIX工艺去除饮用水中硬度和硝酸盐
短句来源
    NITRATE REMOVAL FROM GROUNDWATER BY SULFUR/LIMESTONE FILTER COLUMN
    硫/石灰石滤柱去除地下水中硝酸盐的研究
短句来源
    Studies on the effect of chemical nitrogen fertilizer on the nitrate contamination in vegetables
    化学氮肥对蔬菜硝酸盐污染影响的研究
短句来源
更多       
  nitrates
    Catalytic Reduction of Nitrates from Groundwater
    催化还原去除地下水中硝酸盐的研究
短句来源
    Flocculant of poly-ferric sulfate chloride polymerized by rare earth nitrates(RE-PFSC) catalyst was studied,and proved to produce high density floccules growing,make sludge deposit quickly and possess high COD removal rate,so that it is seen to be more effective for the disposal of dying waste water than PFSC. The optimum process for preparing the RE-PFSC is defined as rare earth nitrates/PFSC=1.2%~2.2%.
    研制了稀土催化型聚氯化硫酸铁(RE-PFSC)絮凝剂,当稀土硝酸盐/PFSC=1.2%~2.2%时,絮体生成快,颗粒密度大,沉降速度快,COD去除率高,处理印染废水效果优于PFSC。
短句来源
    The properties of desulfurizer impregnated with nitrates of heavy metals for removal SO2 from a mixture gas of SO2/N2 were studied. The desulfurizer from coal was impregnated in aqueous solution of 1 wt.% nitrate,dried and heated to 650℃. The SO2 adsorption capacity of impregnated desulfurizer was 2 ~ 3 times that of conventional desulfurizer.
    研究了用重金属的硝酸盐浸渍、用以从SO_2/N_2混合气中除去SO_2的脱硫剂的性能,把煤制脱硫剂在1wt%的硝酸盐的水溶液中浸渍,干燥并加热到650℃,浸渍后的脱硫渍对SO_2的吸附容量为常规脱硫剂的2~3倍,讨论了硝酸盐的种类及剂渍时间对脱硫剂性能的影响。
短句来源
    DETERMINATION OF NITRATES AND NITRITES IN SEA WATER BY GAS CHROMATOGRAPHY
    用气相色谱法测定海水中硝酸盐和亚硝酸盐
短句来源
    Nitrates Contents of the Vegetables in Shanghai Area and Nitrates/Nitrites Contents after Procession
    上海市主要蔬菜中硝酸盐含量及加工处理后硝酸盐和亚硝酸盐含量
短句来源
更多       
  nitrate salt
    The results were as follows:the phosphorus removal was significantly inhibited by nitrate salt when its concentration was larger than 5mg/L;
    结果表明 ,硝酸盐的浓度≥ 5mg/L对生物除磷有明显抑制作用 ;
短句来源
    Methanol wastewater was treated with denitrifying bacteria under anoxic condition and nitrate salt existing as electron acceptors, and the effect factors, such as N/C ratio, retention time etc.
    主要探讨了硝酸盐还原菌在缺氧条件下利用硝酸盐作为电子受体处理甲醇废水的可行性。
短句来源
  nitrate removal
    The Study of the Nitrate Removal in Groundwater Using Extractive Membrane Bioreactor
    萃取膜生物反应器去除地下水硝酸盐研究
短句来源
    NITRATE REMOVAL FROM GROUNDWATER BY SULFUR/LIMESTONE FILTER COLUMN
    硫/石灰石滤柱去除地下水中硝酸盐的研究
短句来源
    New Processes of Nitrate Removal from Ground Water
    地下水中硝酸盐去除的新工艺
短句来源
    Using paper as the carbon source for groundwater nitrate removal.
    以纸为碳源去除地下水硝酸盐的研究
短句来源
    The Study on Nitrate Removal Methods of Groundwater
    地下水硝酸盐去除方法的研究
短句来源
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      nitrate
    Study on eruption of heat for Escherichia coli B aroused by lanthanum nitrate and its mechanism
          
    Biological effect of rare-earth lanthanum nitrate on the growth of Escherichia coli B was studied using the calorimetric method.
          
    There were exceptional changes on the growth thermogenic curves for high concentrations of lanthanum nitrate.
          
    When the concentration of lanthanum nitrate was at 300 mg/L and 500 mg/L, and Q of the cultures reached 3.89 and 2.54 times of normal cultures, respectively.
          
    Nanometer MgO was prepared via a sol-gel auto-combustion technique using magnesium nitrate as raw material and citric acid as chelating agent.
          
    更多          
      nitrates
    Soil moisture, temperature, and nitrogen (ammonia and nitrates) at three depth intervals were also analyzed in these plots.
          
    Reduction of Nitrates by Azotobacter indicum and Azotobacter chroococcum Cultures
          
    The most active enzyme fixation was observed in the case of a late (after 14 days) application of nitrates in the variants with both separate inoculations and inoculation with the binary preparation of A.
          
    meliloti and application of nitrates 2 weeks after inoculation was optimal for active nitrogen fixation (224.7 C2H4 nmol/flask · 24 h) and low denitrification activity (1.8 μmol N2O/flask · 24 h).
          
    A rapid method to evaluate potential vasodilatory activity of organic nitrates
          
    更多          
      nitrate salt
    Anti-Inhibition of Radiolytic Hydrogen by Hydroxonium Ions in Aqueous Nitrate Salt Solutions under Proton-Beam Irradiation
          
    It was found that the nitrate salt film starts to form at the anode when the anodic current density reaches approximately two thirds of its maximum on the voltammograms.
          
    The reaction of metallic sodium with a large excess of sodium and potassium nitrate salt mixtures was studied at temperatures up to 873 K.
          
    The effects of deformation on the corrosion resistance of Incoloy Alloy 800 in sodium nitrate and potassium nitrate salt mixtures have been studied.
          
    The effect of a molten nitrate salt environment on the mechanical properties of INCOLOY alloy 800
          
    更多          
      nitrate removal
    The level of nitrate removal from the UAHGR and UASGR were maintained at over 90% at a nitrate loading rate ranging from 0.15~0.40 kgNO3-/m3·d and no significant nitrite accumulation was observed in either reactor.
          
    The stoichiometric ratio of sulfate production to nitrate removal was 1.5~2.1 mgSO42-/mgNO3- in both reactors.
          
    The experimental stoichiometric ratio of sulfate production to nitrate removal was ranged from 1.5 to 2.1 mgSO42-/mgNO3-.
          
    This system employing a compact and a simple electrolysis cell is expected to be an alternative or a supplement to conventional biological treatments for nitrate removal.
          
    With above 20 mg/L of sufficient NO3--N supply, phosphate was taken up excessively by the DNPAOs in anoxic condition, resulting in the ratio of phosphorus uptake to nitrate removal to be 1.97.
          
    更多          


    Studies on the application of ozonation and biological activated carbon

    本文研究了用臭氧化和生物活性炭法去除污染水中三卤甲烷、三氮、硝基化合物等多种污染物的效能、特征和机理。试验发现,粒状活性炭床过滤吸附法(简称“C”法)和臭氧化-粒状活性炭过滤吸附法(简称“O_3+C”法)都能有效地除去氨氮,但前者的水中亚硝酸盐明显升高,而后者的出水中硝酸盐明显升高。两者在运行初期对 THMs 都有一定的去除效率,但随着生物活性的增强,出水中THMs 的浓度明显增高。本文还系统地研究了五种硝基芳烃和丹宁、甲醛的臭氧化反应动力学以及臭氧化对活性炭吸附的影响,以及臭氧在水中的吸收和自分解。

    In the paper, two different processes, granular activated carbon adsorption ("C"process) and Ozonation-activated carbon adsorption ("O_3 + C"process), were studied experimentally for removal of three forms of nitrogen from potable water on a comparative way. The results indicate that the ozonation is capable of oxidizing organic nitrogen into NH_3-N, and NO_2~--N into NO_3~--N, thus resulting in the increase of their content in the effluent. It was also found out that the ammonium nitrogen was effectively removed...

    In the paper, two different processes, granular activated carbon adsorption ("C"process) and Ozonation-activated carbon adsorption ("O_3 + C"process), were studied experimentally for removal of three forms of nitrogen from potable water on a comparative way. The results indicate that the ozonation is capable of oxidizing organic nitrogen into NH_3-N, and NO_2~--N into NO_3~--N, thus resulting in the increase of their content in the effluent. It was also found out that the ammonium nitrogen was effectively removed in the activated carbon beds by the mechanisms of microbiological assimilation and nitrification. However, in the"C"process, the nitrification process was dominated by the nitrite forming stage, and consequently the nitrite concentration of the effluent from the carbon bed is much higher than that of influent. Meanwhile, the carbon bed of the "C"process exhibited considerably high removal efficiency for nitrate. This is considered to be due to the mechanisms of biological denitrification and reduction of nitrate by a biodegradation product, alcoholic cthyl acid, into N_2 under the oxygen deficient condition in the carbon bed. In the "O_3 + C"process, the nitrification process was carried to the end with formation of nitrate under oxygen-sufficient conditions in the carbon bed. As a result, the nitrate concentration in the effluent increased markedly over the influent. The increased hydrogen ions, H~+ resulted from nitrification can be neutralized by the hydroxide ions, OH~+ dissociated from the carboxide groups on the activated carbon surface, thus preventing the effluent pH from dropping significantly.

    本文对粒状活性炭吸附法和臭氧一活性炭吸附法两种处理流程(简称“C”流程和“O_3+C”流程)进行了从饮用水中去除三态氮的对比试验。结果表明,臭氧化能够将有机氮氧化成氨氮;亚硝酸盐氮氧化成硝酸盐氮,从而使它们在出水中的含量增加。试验还发现,在活性炭滤床中通过生物同化和硝化作用等机理有效地除去了氨氮。但是在“C”流程中硝化过程以亚硝化阶段为主,使出水中亚硝酸盐浓度远大于进水浓度。同时,“C”流程具有相当的硝酸盐去除率。

    This paper discusses the concentration variations of nitrate and nitrite during storage of sea water samples in different bottles and temperatures. Decrease of concentration of nitrate and nitrite is due to the intake of phytoplankton and the adsorption of polyethylene bottles. Increase of concentration of nitrate is due to the oxidation of ammonia and nitrite. Higher temperature will accelerate the above processes. Adding 0.3% chloroform into sample will stabilize it. The experiments show that it is a good...

    This paper discusses the concentration variations of nitrate and nitrite during storage of sea water samples in different bottles and temperatures. Decrease of concentration of nitrate and nitrite is due to the intake of phytoplankton and the adsorption of polyethylene bottles. Increase of concentration of nitrate is due to the oxidation of ammonia and nitrite. Higher temperature will accelerate the above processes. Adding 0.3% chloroform into sample will stabilize it. The experiments show that it is a good practice to keep the samples at 4℃ or -25℃.

    本文讨论了海水水样在不同材料瓶子和不同季节(不同温度)条件下,硝酸盐和亚硝酸盐浓度在储存期间的变化。硝酸盐和亚硝酸盐浓度的减少是由于浮游植物的摄取和聚乙烯瓶的吸附;硝酸盐的增加是由于氨和亚硝酸盐氧化的结果;温度高将有助于上述过程的进行。水样中加0.3%的氯仿有助于稳定水样。实验表明,在4℃和-25℃低温下保存水样,175天内变化较小,这是比较有效的储存办法。

     
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