棉浆粕废水中CODCr值与TOC值相关性研究

棉浆粕废水具有排放量大、有机污染物浓度高、色度深等特点,用在线监测仪测定废水中的TOC,同时用重铬酸钾法测定废水中的CODCr,以此寻找出棉浆粕废水中CODCr与TOC之间的相关性.采用在线监测仪快速测定废水中的TOC值,可间接求出CODCr的测定值,能够真实反映棉浆粕废水中CODCr值,从而达到对棉浆粕废水中CODCr含量的有效监控.     

印染废水中总有机碳与化学需氧量的相关性

通过测定水中TOC浓度，可综合性地判断废水中有机物污染的程度，也能全面、合理地了解废水中的有机污染物。现采用TOC4100燃烧氧化-非分散红外吸收测定仪，对几种印染废水进行分析测试，并通过对TOC值与COD值的比较，找出印染废水中TOC与COD的相关性。     

典型行业废水特征有机污染物排放控制标准探讨

通过对典型行业废水有机污染物排放现状的调查研究，探讨我国现有污水排放标准存在的问题，即现有的标准不能有效控制废水特征有机污染物排放。依据美国环保局多介质环境模型，用不同方法计算水介质排放环境目标值，用该值作为标准限值，评价典型行业废水有机污染物监测结果。针对典型行业废水有机污染物排放特征，提出制订排放控制标准的建议。     

纺织印染废水中TOC值和COD值的相关性

论证了纺织印染废水中TOC值和COD值的相关性，建立了COD和TOC的相关关系式。通过对实测的TOC值和COD值进行的一系列数理统计显著性检验，证实了纺织印染废水中TOC值和COD值之间具有良好的相关性，但基于生产过程、设施装置和排污情况的差异，印染企业在运用COD和TOC的相关关系式时，应根据自身的具体情况，通过实验建立相应的回归方程。     

紫外-可见分光光度法用于染料废水絮凝脱色效果测定的研究

染料废水絮凝处理后的脱色率是检验絮凝剂絮凝效果的重要指标。文章通过测定废水絮凝处理前后吸光度值的变化 ,从而精确计算出脱色率 ,可避免传统目视比色法带来的人为误差。采用分光光度法测定染料废水絮凝脱色率 ,方法简单、易掌握     

高氯离子废水化学需氧量分析方法的研究

提出一种测定高氯离子废水 COD的新方法。其消解条件与现行国标法基本相同 ,消解过程产生的氯气用Na OH吸收并测定出氯离子的 COD校正值。由表观 COD值减去氯离子的 COD校正值 ,即为水样的真实 COD值。标样的相对误差在 -1.5 %～ 5 %之间 ,RSD%≤ 5 .5 %。高氯废水的 RSD%≤ 8.0 %。     

废水COD分析的取样误差和最小重复测定次数的确定

废水ＣＯＤ分析的取样误差和最小重复测定次数的确定谢美云（福建三明市环境监测站，３６５０００）在日常监测中，发现水中悬浮物对ＣＯＤ值有一定的影响，特别是测定锅炉除尘废水，由于废水中含有大量的未燃烧完的粉煤灰，直接影响着ＯＣＤ值，当粉煤灰含量高时，ＣＯＤ...     

固相萃取高效液相色谱法测定废水中苯酚和间甲酚

以苯乙烯 -二乙烯基苯树脂为固相萃取柱 ,萃取废水中的苯酚和间甲酚 ,用MOS -Hypersil色谱柱进行分离 ,不需要调节废水和流动相的 pH值 ,加标回收率大于 89%。     

分光光度法测定染色废水的色度

为消除测定染色废水色度的主观误差，采用分光光度法测定染色废水的色度，与稀释倍数法相比，具有精确，重现性好，适用范围广等特点，ＰＨ值对色度的测定有明显影响，控制ＰＨ值为７．６０，测定色度具有可比性。     

高盐量废水悬浮物的分析

测定水样悬浮物 ,根据方法要求 ,在过滤水样后 ,应以蒸馏水连续洗涤 3次 ,再烘干至恒重。这一操作环节不可或缺 ,否则会严重影响分析结果。曾对某颜料公司经中和处理后的废水进行悬浮物分析 (矿化度高达 1 8 2 ｇ/Ｌ) ,发现分别洗涤 1次～4次的 4个样品 ,测得值为 1 0 6ｍｇ/Ｌ、32ｍｇ/Ｌ、1 9ｍｇ/Ｌ和 1 8ｍｇ/Ｌ ,该悬浮物准确值为 1 8ｍｇ/Ｌ。为此 ,在分析含盐量较高的废水时 (如化工废水 ,肠衣废水等 ) ,应特别注意洗涤次数 ,以避免盐份的干扰。高盐量废水悬浮物的分析@王爱华$如皋市环境监测站!江苏如皋226500…     

伊犁河水质中CODCr和CODMn的相关性探讨

对伊犁河水质中CODCr与CODMn的相关性进行了讨论。     

浅谈TOC与CODCr的关系

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。     

投菌水解（酸化）—生物接触氧化—混凝法处理酵母生产废水

研究了采用投菌水解（酸化）－生物接触氧化－浊凝化处理酵母生产废水。试验结果表明，进水浓度控制在ＣＯＤＣｒ值５０００ｍｇ／Ｌ左右，生化系统可取得较高的处理效率；生经处理出水再以碱式 化铝为混凝剂，聚丙烯酰胺为助凝剂进行混凝处理，其出水ＣＯＤＣｒ值可控制在２００ｍｇ／Ｌ以下，并且可部分回流使用。     

CODCr测定方法探讨

对经典测定水样ＣＯＤＣｒ的方法进行了改进,以硫酸银－硫酸铜作催化剂代替单独作用硫酸银,用适量硝酸银、硝酸铋代替硫酸汞消除氯离子的干扰,适当提高了消解用硫酸浓度,缩短回流时间。     

长春南湖底泥疏浚前后水因子分析及动态变化

监测了长春南湖底泥疏浚后的DO、NH4＿N、NO2＿N、NO3＿N、BOD5、CODCr、TN、TP、SS、pH、SD和水温等12项水化学指标。用因子分析方法找出了底泥疏浚前后影响南湖水质的主要因子,分析了底泥疏浚前后南湖水质变化的特征和底泥疏浚对南湖水质的影响,分析结果表明,南湖疏浚前主要污染物是总磷,疏浚后总磷对水质的影响降低,悬浮物作用增大。     

乙基橙褪色光度法测定加碘盐中微量碘（Ⅴ）

提出了在盐酸介质中,在溴化钾催化作用下,碘酸根氧化乙基橙褪色吸光光度法测定碘的新方法。结果表明,最大吸收波长为５１０ｎｍ时,碘（Ⅴ）浓度在０～１．６ｍｇ／Ｌ内呈线性关系,表观摩尔吸光系数为４．４×１０４,方法用于加碘盐中碘（Ⅴ）的测定,结果满意。     

氯仿,四氯化碳对蚕豆根尖细胞微核诱发效应的比较研究

利用蚕豆根尖细胞微核方法检测氯仿、四氯化碳的诱变效应，结果表明，氯仿从０．０１ｇ／Ｌ至１．０各浓度组微核率明显高于阴性对照组（Ｐ〈０．０１），亦高于阳性对照组（Ｐ〈０．０１），四氯化碳从０．０１ｇ／Ｌ至１．０ｇ／Ｌ各浓度组微核率同样明显高于阴性及阳性对照组（Ｐ〈０．０１），且同一浓度的２种药物诱发微核率比较，氯仿高于四氯化碳，差异非常显著，说明氯仿的诱变活性强于四氯化碳。     

Performance of an electrochemical COD (chemical oxygen demand) sensor with an electrode-surface grinding unit

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.     

Measurement of chemical oxygen demand (COD) in natural water samples by flow injection ozonation chemiluminescence (FI-CL) technique

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.     

Mesophilic biomethanation and treatment of poultry waste-water using pilot scale UASB reactor

The feasibility of applying the up-flow anaerobicsludge blanket (UASB) treatment for poultry waste (faeces)water was examined. A continuous-flow UASB pilot scalereactor of 3.50 L capacity using mixed culture was operatedfor 95 days to assess the treatability of poultry waste-water and its methane production. The maximum chemicaloxygen demand (COD) removed was found to be 78% whenorganic loading rate (OLR) was 2.9 kg COD m^-3 day^-1 athydraulic retention times (HRT) of 13.2 hr. The averagebiogas recovery was 0.26 m³ CH₄ kg COD with an averagemethane content of 57% at mean temperature of 30 °C.Data indicate more rapid methanogenesis with higher loadingrates and shorter hydraulic retention times. At feedconcentration of 4.8 kg COD m^-3 day^-1, anaerobic digestionwas severely retarded at all hydraulic retention timetested. This complication in the reactor operations may belinked to build-up of colloidal solids often associated withpoultry waste water and ammonia toxicity. Isolates fromgranular sludge and effluent were found to be facultativeanaerobes most of which were Pseudomonas genera.