共查询到20条相似文献,搜索用时 390 毫秒
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第一节概述含氟烟气污染环境是目前钙镁磷肥生产中存在的共同问题。我省高炉钙镁磷肥厂排放的含氟烟气,一般含氟量在0.5—2.5g/NM~3左右,由于大多数厂的含氟烟气未经处理就直接排放,不仅危害厂区及周围环境,影响了农业生产,而且也直接损害人民群众 相似文献
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广东某工业生产车间废水含氟浓度较高,设计中采用设计采用三级物化处理,将氟离子浓度处理至排放标准后与综合废水混后排放。该工艺对COD、SS、F-和TP的去除率分别达到25%、70%、99.6%和98.3%。该工艺抗冲击负荷强,对含氟废水处理效果较好。 相似文献
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利用连续流动分析仪测定酚标准溶液和炼厂净化水中的挥发酚,并与HJ 503—2009中的4-氨基安替比林直接分光光度法进行对比。结果表明:标准曲线的相关系数为0.999 8;对挥发酚标准样品进行测定,结果与推荐值基本一致,相对误差为-3.61%~3.89%,相对标准偏差为0.59%~1.09%,准确度和精密度良好。对炼厂净化水中的挥发酚进行测定,加标回收率为91.4%~108.6%,与HJ 503—2009相比,结果吻合较好,适于炼厂净化水中挥发酚的测定。 相似文献
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以实际检测工作中的工件尺寸和所使用的γ放射源剂量大小为依据,应用GBZ 132-2008《工业γ射线探伤放射防护标准》中查图法和GBZ 132-2002《工业γ射线探伤放射防护标准》中查图法和计算法,综合比较三种方法所得出的防护距离,再通过现场以γ射线剂量检测仪实测数据作为验证,证明了三种方法得出的距离边界的剂量率都小... 相似文献
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周留富 《化学工业与工程技术》2006,27(4):53-56
利用自动电位滴定仪建立了用一次微分终点滴定法测定轻柴油碘值的新方法。对实验条件及一些影响因素进行了必要的讨论。与SH/T0234—92轻质石油产品碘值和不饱和烃含量测定法相比,该法具有终点判断简单,操作简便,测定重复性好等优点;一次测定时间平均20 min,比SH/T0234—92法平均减少28min,试剂用量减少约1/2。 相似文献
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对比了3个国内外炭黑含量测定方法标准,探讨了管式电炉法、马弗炉法、热重分析仪法等3种测试方法的差异,并据此对GB/T 13021—XXXX《聚乙烯管材和管件炭黑含量的测定(热失重法)》标准的修订提供了建议。结果表明,GB/T 13021—1991包含的测定方法较为单一;建议GB/T 13021—XXXX标准修订时,在管式电炉法中,增加若使用氧气含量小于0.002 %的氮气则可不进行除氧等规定,并增加试验前对样品舟的清洁和称重要求;增加马弗炉法(传统马弗炉法和微波马弗炉法)和热重分析仪法;马弗炉法建议称重步骤采用ISO 6964?2019的规定;热重分析仪法建议在ISO 6964?2019规定的基础上,增加取样部位和取值说明要求。 相似文献
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A multilinear regression method is presented by which the analysis of emf data for electrochemical cells as a function of electrolyte concentration and temperature is achieved in a single stage yielding thermodynamic quantities and their estimated standard errors. This procedure is considered to be an advance over the two-stage method of treating the concentration and temperature variation separately. The new method is applied to selected literature data for the evaluation of the standard potential of the silver—silver chloride electrode, the autoprotolysis constants of light and heavy waters and the second ionization constant of glycerol-2-phosphate. 相似文献
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文章采用微电解—ClO2催化氧化—生化复合废水处理技术对农药废水进行处理,研究表明:进水平均CODCr6000mg/L、色度1500倍时,经微电解—ClO2催化氧化—生化法复合处理后,出水CODCr为60mg/L、色度为15倍,CODCr去除率达99%,各项指标均能达标排放。因此,微电解—ClO2催化氧化—生化复合废水处理技术对农药中硝基和胺基废水处理效果较理想。 相似文献
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Edward W. Waseburn 《Journal of the American Ceramic Society》1921,4(11):916-922
Significance of porosity.—This is briefly outlined. Standard reference method.—The requirements of an engineering testing method are simplicity, rapidity and convenience with no more accuracy than practical considerations justify. There should, however, be also available a standard reference method, that is, a laboratory method where accuracy is the main requirement. Types of pores.—Six types of pores are described and the process of absorption under various conditions is analyzed. Defitions.—Definitions are proposed for the terms, permeability, penetrability, absorptivity, porosity. bulk density, closed-pore space and “cracks” and “holes,” and methods of measurement are suggested. 相似文献
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It is often desirable to calculate the spectral radiance factor (SRF, the sum of the reflected and fluorescent radiances) which a photoluminescent—commonly called a fluorescent—sample would exhibit if it were irradiated by a standard illuminant, such as CIE D65, which is not available as a source for direct measurement. Several methods described in the literature for calculating the desired SRF from measurements made using available sources are tested experimentally using measurements made on commonly available one-monochromator integrating-sphere spectrophotometers. The choice of the calculation method is shown to be less important than the closeness of the match of the spectral distribution of irradiance on the sample to that from the standard illuminant. This is influenced by both the selection of the experimental source and the effects of the integrating sphere. With all variables properly controlled, comparison of calculated and directly measured SRFs leads to color differences less than one CIELAB unit. 相似文献