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enrichment tendency
相关语句
  富集趋势
     That is to say, there was enrichment tendency for phosphorus, especially for Po, with the increase of soil fertility.
     说明土壤磷素随肥力水平提高有富集趋势,主要是与土壤有机磷的富集有关。
短句来源
     A STUDY ON THE PRIMARY ENRICHMENT TENDENCY OF GOLD IN PRE SINIAN STRATA OF THE NORTHEAST JIANGXI AREA
     赣东北地区前震旦系地层金的原生富集趋势探讨
短句来源
  相似匹配句对
     Reconciliation is the tendency.
     这是《乐园》的一个重要主题。
短句来源
     job enrichment;
     工作丰富化,加强员工工作创造性;
短句来源
     ALKALI-ENRICHMENT TENDENCY OF MAGMATISM DURING EVOLUTION OF THE CONTINENTAL CRUST
     大陆地壳演化中岩浆作用的富碱趋势
短句来源
     TRADE TENDENCY
     行业动向
短句来源
     That is to say, there was enrichment tendency for phosphorus, especially for Po, with the increase of soil fertility.
     说明土壤磷素随肥力水平提高有富集趋势,主要是与土壤有机磷的富集有关。
短句来源
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Based on analysis of auriferous and geochemical properties of the meta morphic rocks,the authors hold that the major elements related to gold mineralization were derived from the Pre-Sinian System.The primary enrichment tendency of gold has been brought to light and the existing source bed for gold mineralization has been deter mined,thus providing guides to ore in this district.

在分析变质岩的含金性及地球化学性质的基础上,认为与金成矿有关的主要元素均源自前震旦系。指出了金的原生富集趋势和存在的矿源层。为在该区寻找金矿指出了方向

The properties of runoff and sediment yield and nutrient loss in the runoff plot slope land were studied under rainfal. The result showed, that the fastigium of runoff yield and sediment yield were in accordance with the rainfall fastigium. The rainfall erosion distribution and rainfall seasonal distribution were uneven. The reason was that rainfall and the rainfall erosivity factor in different period were different. The nutrient concentration of bed load of soil ioss was over the sediment load in the slope...

The properties of runoff and sediment yield and nutrient loss in the runoff plot slope land were studied under rainfal. The result showed, that the fastigium of runoff yield and sediment yield were in accordance with the rainfall fastigium. The rainfall erosion distribution and rainfall seasonal distribution were uneven. The reason was that rainfall and the rainfall erosivity factor in different period were different. The nutrient concentration of bed load of soil ioss was over the sediment load in the slope land. Nutrient concentration of soil loss under covered with vegetation over the fallow. Nutrient concentration are mainly loss by the sediment forms, soluble phosphorus and potassium in runoff are also the important approach of nutrient loss. The nutrient of bed load and sediment load of soil loss both have enrichment tendency, the enrichment ratio of nutrient was changed in two kinds of land use patterns.

在自然降雨条件下 ,研究了有、无植被覆盖径流小区红壤坡面周年内产流、产沙及养分流失特征。结果表明 :径流小区产流、产沙量的高峰期与降雨量的高峰期相一致。降雨侵蚀力与降雨量季节分布的不均匀性是由于不同时期的降雨特征和降雨侵蚀力构成因素决定。坡面流失泥沙悬移质养分浓度均高于推移质中的养分浓度。顺坡种植油菜-花生处理 ,坡面流失泥沙钾、磷养分浓度高于休闲裸坡处理。红壤坡面养分以泥沙结合态流失为主 ,但磷、钾以水溶态流失也是一个重要的养分流失途径。流失泥沙悬移质和推移质都有明显的养分富集现象 ,坡面有、无植被覆盖会使流失泥沙养分富集率发生变化。

The biomass gasification power generation (BGPG) technology would be one of the most advanced ways to use biomass as an clean energy source. A 1MW circulating fluidized bed (CFB) wood waste gasification power generation plant was built and put into operation. The main existing problems during operations are fouling, slagging and corrosion, which are related to the characteristics of ash. A sound understanding of the characteristics of ashes can promote the design of BGPG and the assessment of the environmental...

The biomass gasification power generation (BGPG) technology would be one of the most advanced ways to use biomass as an clean energy source. A 1MW circulating fluidized bed (CFB) wood waste gasification power generation plant was built and put into operation. The main existing problems during operations are fouling, slagging and corrosion, which are related to the characteristics of ash. A sound understanding of the characteristics of ashes can promote the design of BGPG and the assessment of the environmental impact of biomass utility. Therefore, the characteristics of ashes from biomass gasification power generation plant were investigated. The concentration, distribution and enrichment of the trace elements, As, Al, Br, Ca, Cd, Cl, Cr, Cu, F, Fe, Ga, K, Mg, Mn, Na, Ni, P, Pb, S, Si, Sr, Ti, Zn in the gasifier bottom ash, cyclone separator ash and wet scrubber ash were determined by Inductive Coupled Plasma Spectrometer (ICP-AES). X-ray fluorescence (XRF) spectrometer was used to determine the ash compositions based on the weight percent of oxide. The distribution of trace elements in different sizes of ash particles was also examined . The particle size distribution for >50μm ash presents a double peak curve, while the particle size distribution for ≤50μm ash presents a single peak curve. The results show that the large part of ash is residual carbon, and most of the trace elements have an enrichment tendency in the small size particles. Most of volatile matter, e.g. halogen elements and alkali elements, mainly exists in the wet scrubber ash and enriches in fly ash. Most of Fe, Si, Ni, Pb, Zn, Cr, Cd elements are found in the separator ash, indicating an enrichment of heavy metal elements in separator ash. The trace elements such as K, S, Mn, Cu are mainly found in the gasifier bottom ash.

采用电感耦合等离子体发射光谱仪,研究了生物质气化发电厂灰渣中元素As、Al、Br、Ca、Cd、Cl、Cr、Cu、F、Fe、Ga、K、Mg、Mn、Na、Ni、P、Pb、S、Si、Sr、Ti、Zn在气化器底灰、淋洗器灰和旋风分离器灰中的质量分数,并分析了这些元素在不同粒径3种灰渣中的分布规律。结果表明,大部分极易挥发的元素,如卤族元素、碱金属元素主要在淋洗器中存在,表明了它们在飞灰颗粒中的富集。旋风分离器灰在灰渣中所占比例为10%左右,以粗灰为主,灰中Fe、Si、Ni、Pb、Zn、Cr、Cd为多;表明了此灰中重金属元素积累。在气化炉底灰中以K、S、Mn、Cu为主。元素随颗粒物粒径大小和元素性质的不同,呈现不同的富集规律。

 
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