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   precipitation 在 环境科学与资源利用 分类中 的翻译结果: 查询用时:0.014秒
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precipitation     
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  降水
    Pollution Characteristic of Acid Precipitation in Zhejiang and Its Multi-dimension Analysis
    浙江降水污染的特征和多维分析
短句来源
    preliminary Study on Acidity and Composition of Precipitation over Zhoushan
    舟山降水酸度及其组成研究
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    On the distributional characteristics of acidity of precipitation in Shanghai Region and the relationship between the acidity of precipitation and meteorological conditions
    上海地区降水pH值的分布特征及其与气象条件的关系
短句来源
    Predicting Model of Acid Rain pH Value in :Atmospheric Precipitation with Grey System Theory GM(1, 1)
    用灰色系统理论GM(1,1)建立大气降水中酸雨pH值的预测模型
短句来源
    DIRECT DETERMINATION OF CALCIUM IN PRECIPITATION BY ATOMIC ABSORPTION OF FLAME
    火焰原子吸收法直接测定降水中钙
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  沉淀
    AN EXPERIMENTAL STUDY ON COLLECTING ~(14)C SAMPLES IN NATURAL WATER BY PRECIPITATION METHOD
    沉淀法采集天然水中~(14)C样品的试验研究
短句来源
    Treatment of Wastewater Containing Sodium Sulfide by Chemical Precipitation
    化学沉淀法处理含硫废水
短句来源
    REMOVING IRON TO IMPROVE THE QUALITY OF ADU BY MULTISTEP PRECIPITATION
    分步沉淀去铁提高重铀酸铵产品质量
短句来源
    A Study of Separating Gold from Silver in Acidic Thiourea Solution(Ⅱ)(Precipitation Method)
    酸性硫脲溶液中金银分离的研究(Ⅱ)(沉淀法)
短句来源
    STUDY ON THE TREATMENT OF WASTEWATER CONTAINING ARSENIC WITH COAGULATIVE PRECIPITATION PROCESS
    凝聚沉淀法处理含砷废水的研究
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  降雨
    THE SOURCE OF TRACE ELEMENTS IN ATMOSPHERIC PRECIPITATION IN TYPICAL AREA SOUTHWESTERN CHINA -RECEPTOR MODEL APPROACH
    西南典型地区降雨中痕量元素的来源——受体模型法
短句来源
    WATER QUALITY POLLUTION ANALYSIS OF URBAN PRECIPITATION RUNOFF
    城市降雨径流水质污染分析
短句来源
    From the result, it can be seen that the contents of K+ and NO3- in Landiantang spring rapidly increased under different precipitation and the content of K+ and NO3- in the spring had the positive correlation with the rainfall.
    结果表明:在降雨过程中,泉水中的K+和NO3-含量均出现急剧升高的现象,并且泉水内的K+和NO3-含量与降雨强度密切相关。
    Surface Runoff Analysis on Farmland Precipitation in Huangpu River Basin
    黄浦江流域农田地表降雨径流分析
短句来源
    Prediction Model of Shaying River Basin Precipitation Runoff Pollution
    沙颖河流域降雨径流污染预报模型的研究
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  降雨量
    Having comprehended the influence of atmospheric factors on TSP, the results showed that the representative TSP monitoring should be under the atmospheric condition of no rain (daily precipitation lower than 0. 1mm) and lower than 5 m/s of wind velocity.
    通过气象资料分析,发现应在无雨(日降雨量小于0.1mm)和风速小于5m/s的气象条件下测试TSP,才能保证测试结果具代表性。
短句来源
    Furthermore,DNDC model was used to assess the potential effects of variations in precipitation in future on N-2O emissions from above lands.
    同时 ,采用DNDC模型定量探讨了未来降雨量变化对土壤N2 O释放的潜在影响 .
短句来源
    The results indicated that N-2O emission pulses were obviously driven by rainfall and N-2O fluxes were correlated positively with precipitation and soil moisture.
    结果表明 ,降雨与N2 O释放峰间存在明显的驱动 响应关系 ,N2 O释放通量与降雨量和土壤湿度间存在正相关性 .
短句来源
    The results from DNDC modeling showed that N-2O fluxes from soils in summer and autumn would be correlated positively with precipitation,but N-2O fluxes in winter and spring would slightly decrease with great change of precipitation.
    模型检验结果表明 ,夏秋季土壤N2 O释放通量与降雨量变化呈正相关 ,而降雨量的大幅度增加或下降将引起冬春季土壤N2 O释放通量的微弱下降 .
短句来源
    Dynamics of Main Environmental Factors and Its Mechanism in North Basin of Lake Biwa in Low Precipitation Condition ( I )
    在降雨量极少的条件下日本琵琶湖北湖主要环境因子的动态变化和机理的研究(Ⅰ)(英文)
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  precipitation
The water-soluble glucan was obtained from Pleurotus florida fruit bodies by hot water extraction, ethanol precipitation, DEAE cellulose dialysis and Sephadex G-75 gel filtration.
      
Preparation and characterization of nanocrystalline ZnO by direct precipitation method
      
Nanocrystalline ZnO was prepared with ZnCl2·2H2O and (NH4)2CO3 as raw materials by direct precipitation method.
      
The ion-exchanger LiAlTiO4 of spinel type was prepared by the common precipitation/hydrothermal crystallization method, and was acid-modified.
      
The precursors of Fe2O3-SiO2 mixed oxides prepared through co-precipitation method were modified by microwave hydrothermal treatment for the first time.
      
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1) Due to the aridic climate conditions in the. North-western China, the salt lakes have different water compositions among themselves and different from sea water composition also. 2) Three kinds of processes for extracting magnisium salt from salt lake water are re-commended,(a)the fractional crystallization processes,(b)lime precipitation processes, and (c) ion exchange processes. 3) In practice, the method used to extract magnesium salt from salt lake water varies with the reserve of each salt lake...

1) Due to the aridic climate conditions in the. North-western China, the salt lakes have different water compositions among themselves and different from sea water composition also. 2) Three kinds of processes for extracting magnisium salt from salt lake water are re-commended,(a)the fractional crystallization processes,(b)lime precipitation processes, and (c) ion exchange processes. 3) In practice, the method used to extract magnesium salt from salt lake water varies with the reserve of each salt lake and to the percentage of magnesium. But the ion-exchango processes are preferable, because of simplicity and avability under different circumstances.

1.远古时代西北范围全系大海,陆地出水之后,地面经复杂之变化,遂使盐湖具有差别悬殊之多样性,湖水之成分互不相同,与海水亦有异。 2.自盐湖水提取镁盐之方法,有三类,(1)分级结晶法类,(2)石灰沈降法类,(3)离子交换法类。 3.自盐湖提取镁盐之详细步骤,因湖水含镁量之多少,及盐湖贮量之大小而不同,但以离子交换法为最合用,因其简单便利能适应不同之情况。

Adsorption experiments of cadmium on prepared samples of Chinese clay minerals were done. The adsorption isotherms of cadmium on montmorillonite, illite and kaolinite were found to be of the Langmuir-type equation in a wide range of Cd concentrations. Effects of temperature, contact time, pH, particle size and mineral types were also studied. A diagram of dissolution-adsorption-precipitation zones was presented. pH values for rapid adsorption enchancement were in agreement with the calculated pH values...

Adsorption experiments of cadmium on prepared samples of Chinese clay minerals were done. The adsorption isotherms of cadmium on montmorillonite, illite and kaolinite were found to be of the Langmuir-type equation in a wide range of Cd concentrations. Effects of temperature, contact time, pH, particle size and mineral types were also studied. A diagram of dissolution-adsorption-precipitation zones was presented. pH values for rapid adsorption enchancement were in agreement with the calculated pH values for precipitation of carbonates. It seems there exists a correlation of "additivity of saturation adsorption capacities" for different particle sizes or different types of the minerals.

以我国各地典型粘土矿物制备标准样品,对镉进行吸附实验,得到蒙脱石、伊利石、高岭石三种矿物的吸附等温线,在广泛浓度范围内符合Langmuir型方程式。研究了温度、接触时间、PH值、粒径、矿种等对吸附的影响效应。提出了镉的溶解-吸附-沉淀区域图,吸附急剧增强和开始发生碳酸镉沉淀的PH值是一致的。发现对不同粒径和不同矿种都存在“饱和吸附值加和现象”。 对湘江中游及上游天然底质样品以化学分离法逐级除去碳酸盐、有机物、金属水合氧化物等组分,以各级样品进行镉的吸附实验。根据吸附等温线和饱和吸附值可以判断不同组分在吸附中的贡献,发现这与各组分相对含量直接有关。 应用本文提出的工作方法。有可能建立天然水体中吸附过程的定量化学模式。

We have investigated that indium can be extracted by precipitation and extraction from the lead-zinc residue containing 0.06-0.04% of indium. The crude product, containing 98.5% of indium, 0.54% Cd, 0.16% Pb, 4.4×10-2% Sn and 2×10-3%Fe, can be obtained by using both methods. Comparing the two methods, we find the procedure of P204 extraction is simpler and shorter than that of precipitation; the recovered yield is also higher. By the extraction method the yield of indium can reach 98.2%, if calculated...

We have investigated that indium can be extracted by precipitation and extraction from the lead-zinc residue containing 0.06-0.04% of indium. The crude product, containing 98.5% of indium, 0.54% Cd, 0.16% Pb, 4.4×10-2% Sn and 2×10-3%Fe, can be obtained by using both methods. Comparing the two methods, we find the procedure of P204 extraction is simpler and shorter than that of precipitation; the recovered yield is also higher. By the extraction method the yield of indium can reach 98.2%, if calculated from the leached, liquid whereas only about 50% of indium can be obtained by the precipitation method.

本文报道了用沉淀法及萃取法从含铟量为0.06~0.04%的铅锌废渣中提取铟.试验表明采用这两种方法都能制得纯度为98.5%的粗铟,主要杂质含量%:Cd 0.54;Pb 0.16;Sn 4.4×10~(-2);Fe 2×10~(-3).但是用P_(204)萃取剂提取铟,比之沉淀法不仅操作简便,流程短,而且回收率高,按浸出液计可达98.2%,而沉淀法仅50%左右.

 
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