共查询到19条相似文献,搜索用时 109 毫秒
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地表水BOD_5的快速预测预报 总被引:1,自引:0,他引:1
地表水五日生化需氧量(BOD5)的测试需要五天时间,分析周期较长。本文建立了BOD5与高锰酸盐指数(CODMn)、BOD5与溶解氧(DO)之间的直线回归方程,通过测定地表水的CODMn和DO可分别对地表水的BOD5实现快速预测预报。现场使用溶解氧测定仪检测DO,可立即预报地表水的BOD5。 相似文献
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钻井污水化学需氧量的研究 总被引:1,自引:0,他引:1
针对石油工业钻井污水高化学需氧量(COD)严重超标的状况,对钻井污水的化学需氧量进行研究。分折测定了8种钻井液添加剂(PAN、PAMI、HPAN、柴油、磺化沥青、XY27、CMC、FA367)的COD;重点探讨了钻井液添加剂对钻井污水COD的影响,同时对钻井污水COD处理效果的影响进行了研究。实验结果表明,不同钻井液添加剂对钻井污水的COD的影响程度各不相同;钻井污水中COD值严重超标的主要因素是钻井液添加剂;并且钻井液添加剂浓度与其对应的COD之间存在良好的一元线性关系。根据一元线性回归方程可较好地预测油田现场各钻井液添加剂对COD的影响,为解决钻井污水处理这一难题提供科学依据。 相似文献
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莫新萍 《环境监测管理与技术》2002,14(4):45-45
长期以来 ,国内一般采用BOD5 和COD作为评价水体污染的综合指标。但是 ,仅测定BOD5 和COD不能全面准确地反映废水中不同有机污染物质对水体的污染程度 ,而测定总有机碳 (TOC)能够较好地反映之 ,并且可以通过专用仪器快速测定。1 TOC的测定1 .1 主要仪器与试剂1 0 2 0型TOC测定仪 ,美国O .I公司 ;1 0 5 0型自动进样器 ,美国O .I公司 ;无水碳酸钠 :GR ;苯二甲酸氢钾 :GR ;氢氧化钠 :AR ;85 %磷酸 ;36%盐酸。1 2 方法原理TOC测定采用高温燃烧—非分散红外吸收法将样品注入燃烧炉 ,在温度 680℃~ 95 0℃… 相似文献
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周能芹 《甘肃环境研究与监测》1996,9(1):46-47,38
根据缫丝行业废水CODCr与BOD5的测定结果,通过研究它们之间的相关性,建立了相关方程式,从而以CODcr值预测预报BOD5值,大大简化了分析测试工作,对控制该行业污染及其治理,加强监督管理起到积极作用。 相似文献
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为实现我国对CODCr排污总量控制,提出了CODCr现场监测的实施方法及总量监测方法。各排污单位必须配备污水流量计、自动采样器或CODCr在线连续自动监测仪等,对污水中CODCr的排放总量实施监测。同时着重介绍了CODCr在线连续自动监测仪。 相似文献
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美国HACH公司COD测定仪由COD消解反应器、消解液及DR100专用比色计构成。此法具有快速、节省试剂、防止低沸点有机物挥发和省去冷凝等优点。但原装消解液价格昂贵,今试用自配消解液代替原装消解液,以降低成本。1试验11主要仪器和试剂HACH456... 相似文献
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BOD5稀释倍数的探讨 总被引:1,自引:1,他引:0
李连声 《环境监测管理与技术》1998,10(6):42-43
对稀释法测定生化需氧量(BOD5)稀释倍数探讨如下。1已知COD值对于初次测定成分复杂的工业废水,若已知COD(C)值,其α(BOD5/COD)一般在02~08之间,则BOD5=(02~08)COD根据《水和废水监测分析方法(第3版)》,BO... 相似文献
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探讨了一种简便的医院污水BOD测定中样品稀释倍数的推算方法。首先测定CODCr值,由CODCr值除以系数8,即获得稀释倍数C=CODCr/8。结果表明,该法仅需配制一个稀释比,省时省力,并具有可靠性好,准确度高,适应性强等优点。适用于各种医院污水中BOD的分析监测。 相似文献
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废水的BOD5测定中取稀释比是一个很重要的问题。本文根据数学推导得出BOD5测定中取稀释比的一种方法。BOD5/CODcr值在0.05-0.1,0.1-0.3,0.3-0.6,0.6-1.0四个范围内其稀释比f2可对应取55/CODcr、22/CODcr、9/CODcr、5/CODcr。 相似文献
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浅谈TOC与CODCr的关系 总被引:10,自引:0,他引:10
介绍了TOC和CODCr的含义,比较了TOC与CODCr测定方法、使用仪器的不同和各自的优缺点,并从理论上和实际水样测定中论述了TOC和CODCr的相关性。对于不同的废水,TOC 与CODCr的相关性不一样,必须先实验求出二者之间的关系。 相似文献
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Performance of an electrochemical COD (chemical oxygen demand) sensor with an electrode-surface grinding unit 总被引:2,自引:0,他引:2
Geun Jeong B Min Yoon S Ho Choi C Koang Kwon K Sik Hyun M Heui Yi D Soo Park H Kim M Joo Kim H 《Journal of environmental monitoring : JEM》2007,9(12):1352-1357
An electrochemical COD (chemical oxygen demand) sensor using an electrode-surface grinding unit was investigated. The electrolyzing (oxidizing) action of copper on an organic species was used as the basis of the COD measuring sensor. Using a simple three-electrode cell and a surface grinding unit, the organic species is activated by the catalytic action of copper and oxidized at a working electrode, poised at a positive potential. When synthetic wastewater was fed into the system, the measured Coulombic yields were found to be dependent on the COD of the synthetic wastewater. A linear correlation between the Coulombic yields and the COD of the synthetic wastewater was established (10-1000 mg L(-1)) when the electrode-surface grinding procedure was activated briefly at 8 h intervals. When various kinds of wastewater samples obtained from various sewage treatment plants were measured, linear correlations (r(2)> or = 0.92) between the measured EOD (electrochemical oxygen demand) value and COD of the samples were observed. At a practical wastewater treatment plant, the measurement system was successfully operated with high accuracy and good stability over 3 months. These experimental results show that the application of the measurement system would be a rapid and practical method for the determination of COD in water industries. 相似文献
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The degree of chemical treatment in terms of removal of organic matter from different wastewaters has been investigated by employing potassium ferrate (K2FeO4) and ozone in various combinations. The study was performed in both the batch and the continuous flow systems. The treatment efficiency was determined through three different methods, i.e., chemical oxygen demand (COD), fluorescence and ultraviolet (UV) absorption. Fluorescence and UV absorption techniques were employed due to their specificity in measurement of humic substances, aromatic compounds and heterocyclic systems, whereas COD is a general parameter for the estimation of total organic matter. Fluorescence and UV absorbance values were correlated with respective COD values.Abdul Bari is with the Department of ChemistryShaukat Farooq is with the Department of Civil Engineering 相似文献
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通过测定Cr^3+、Cr2O7^2-和Cu^2+吸收曲线及标准水样的COD值,研究了Cu^2+对分光光度法测定COD的影响。结果表明,可改变吸收波长和量程消除较高质量浓度Cu^2+对COD测定值产生的明显影响。当水样Cu^2+质量浓度超过400mg/L时,须将水样稀释后采用低量程法进行测定。 相似文献
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Jin B He Y Shen J Zhuang Z Wang X Lee FS 《Journal of environmental monitoring : JEM》2004,6(8):673-678
COD determination based on ozone oxidation of alpha-naphthol combined with UV radiation (UV-O3) has been studied in the present work. Utilizing the phenomenon that luminol can be oxidized by the dissolved ozone to produce luminescence, we have established a new method of utilizing aqueous chemiluminescence to determine COD. The kinetics and mechanism of the ozonation reaction of alpha-naphthol have been investigated in order to gain a better understanding of the general applicability and limitation of the technique. Real world samples were analyzed and the results show that the relative error of COD(FI-CL) measurement for water samples was < 10%. Compared with the results of the conventional potassium permanganate method, the COD values of the FI-CL method are consistently higher (0-20% relative). The higher COD values suggest that the ozone-UV system is a more effective oxidation technique. 相似文献