共查询到18条相似文献，搜索用时 265 毫秒
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本文研究用美国Rosemount DC—85A有机总碳测定仪测定石油炼制废水中TOC与COD是否有相关性,二者具有良好的相关性.在一定条件下可以从测得的TOC值推算出COD值,因而可以用TOC值作为有机废水污染的控制指标. 相似文献
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《绵阳师范学院学报》2015,(11):39-44
本文选取安昌河绵阳段6个断面,研究其水体中总有机碳(TOC)、化学需氧量(CODCr)、生化需氧量(BOD5)和溶解氧(DO)之间的内在联系与相关性.结果表明TOC与CODCr、BOD呈线性相关性,其中CODCr=2.406TOC-34.186,r=0.78,在BOD5和TOC相关性分析中,将各采样点的BOD5和TOC值进行一元线性回归可得出0.786相似文献
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陈昀 《南通职业大学学报》2015,(2)
针对毒死蜱缩合工艺过程的生产废水,采用重铬酸钾法测定其化学需氧量（COD）,采用燃烧氧化—非色散红外吸收法测量总有机碳TOC含量,并分析其相关性和ρ（COD）/ρ（TOC）值。结果表明,对于稳定水质的废水,COD与TOC有显著的相关性,但不同性质的废水,ρ（COD）/ρ（TOC）值差异很大;其值波动的主要原因是废水中有机成分的组成不同、存在还原性的非有机物及COD测定中氧化率不同。 相似文献
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臭氧电晕协同处理有机实验室废水的研究 总被引：1，自引：0，他引：1
用高压电晕和臭氧联用的方法来处理有机实验室产生的高浓度废水。在最佳实验条件的基础上对高浓度苯胺废水进行处理。当降解时间为60 min时,质量浓度为500 mg/L的苯胺废水CODcr和TOC的去除率分别可达70.1%和63.2%,且处理后废水的可生化性也得到了较大的提高。因此,电晕和臭氧联用也可作为一般废水处理的前处理工艺。 相似文献
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水环境在线监测总有机碳(TOC)与化学需氧量(COD)之间相关性探讨 总被引：1，自引：0，他引：1
通过对地表水总有机碳(TOC)与化学需氧量(COD)之间关系分析,并结合水质在线监测实际监测数据统计资料分析,对理论与实际监测结果比较分析,结果表明水质中总有机碳(TOC)与化学需氧量(COD)之间既存在着线性关系,又受地表水受纳水质的不确定性影响,使水质监测中的TOC与COD之间的相关性存在着一定的不确定性. 相似文献
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改良了一种针对浑浊易沉淀液体的总有机碳(TOC)检测方法(固体NPOC法),并验证了该方法的可靠性与准确性,优化了该方法中样品的预处理过程,通过实际样品进一步验证了该方法检测浑浊易沉淀液体样品TOC的准确性。结果表明:此方法与标准液体的NPOC法均可用于可溶性葡萄糖溶液的TOC测定,其准确度无显著性差异(P0.05);但测定浑浊易沉淀的不溶性淀粉标准溶液时,液体NPOC法所测定的值明显小于标准值和固体NPOC法的测定结果,且淀粉浓度越大,差异越明显;对样品进行盐酸酸化,其pH值低于4即可,总进样体积以200μL或300μL为佳。 相似文献
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结合我国实际和生活垃圾填埋场产生的渗滤液对环境的影响,对一种能够有效处理渗滤液的回灌方法进行了初步研究．回灌试验考虑到渗滤液水质复杂多变,具有高COD含量、高NH3-N含量和高重金属离子的特点,主要采取厌氧回灌．研究内容主要有两个方面：一方面,对试验垃圾渗滤液进行回灌试验,研究回灌法对垃圾渗滤液中CODcr、NH3-N、NO3-N、NO2-N等各项指标的去除效果;另一方面,主要通过改变pH值和改变依据CODcr调节的水力负荷值来研究对渗滤液回灌效果的影响因素。 相似文献
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贾天理 《绵阳师范学院学报》2009,28(5):11-14
从下乡家电中标企业供应链系统的全局出发,结合数学与TOC方法,分析了多订单条件下家电产品供应的排序问题,提出了基于TOC的供应链系统中的订单排序法,给出了运筹式TOC供应链系统中的订单排序模型,提供了基于TOC供应链系统的运筹管理示例.该方法可以有效地降低供应链系统中的库存,提高家电下乡服务的水平,增加企业有效产出. 相似文献
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Reconfiguration is the key to produce an applicable ternary optical computer (TOC). The method to implement the reconfiguration
function determines whether a TOC can step into applied fields or not. In this work, a design of the reconfiguration circuit
based on field programmable gates array (FPGA) is proposed, and the structure of the entire hardware system is discussed. 相似文献
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In this paper an overall scheme of the task management system of ternary optical computer (TOC) is proposed, and the software
architecture chart is given. The function and accomplishment of each module in the system are described in general. In addition,
according to the aforementioned scheme a prototype of TOC task management system is implemented, and the feasibility, rationality
and completeness of the scheme are verified via running and testing the prototype. 相似文献
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张景环 《河北职业技术师范学院学报》2014,(3):64-69
通过375℃热氧化方法,对松辽流域6种沉积物中的黑炭进行了分离定量,并研究了沉积物和黑炭对萘的吸附行为。结果表明,沉积物中黑炭占总有机碳的质量分数为0.091 3-0.374 0,平均值为0.205 0。所有沉积物和黑炭样品对萘均表现为非线性吸附,Freundlich模型对吸附数据的拟合效果很好。与原始沉积物相比,黑炭对萘的吸附非线性更强,n值为0.629-0.827,说明黑炭比沉积物具有更多的非均质性的吸附位。在给定浓度Ce下,黑炭的吸附能力参数Koc值较沉积物样品高,表明黑炭对萘的吸附能力更强。萘的Kf值与沉积物有机碳含量存在很好的正相关关系（R2=0.990,p〈0.001）,揭示了沉积物有机碳含量在萘吸附能力中的重要性。本研究为预测多环芳烃在环境中的分布特征和最终归趋提供了理论依据。 相似文献
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The effects of the concentration of dissolved total organic carbon(TOC),the TOC/Br-ratio,bromide ion levels,the chlorine to ammonia-N ratio(Cl:N),the monochloramine dose and the chlorine dose on the formation of trihalomethanes(THMs)(including chloroform,bromodichloromethane,chlorodibromomethane,and bromoform)from chlorination were investigated using aqueous humic acid(HA)solutions.The profile of the chloramine decay was also studied under various bromide ion concentrations.Monochloramine decayed in the presence of organic material and bromide ions.The percentage of chloroform and brominated THMs varied according to the TOC/Br-ratio.Total THMs(TTHMs)formation increased from 112 to 190 μg/L with the increase concentrations of bromide ions from 0.67 to 6.72 mg/L,but the chlorine-substituted THMs were replaced by bromine-substituted THMs.A strong linear correlation was obtained between the monochloramine dose and the formation of THMs for Cl:N ratios of 3:1 and 5:1.These ratios had a distinct effect on the formation of chloroform but had little impact on the formation of bromodichloromethane or chlorodibromomethane.The presence of bromide ions increased the rate of monochloramine decay. 相似文献
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The effects of the concentration of dissolved total organic carbon (TOC), the TOC/Br- ratio, bromide ion levels, the chlorine to ammonia-N ratio (Cl:N), the monochloramine dose and the chlorine dose on the formation of trihalomethanes (THMs) (including chloroform, bromodichloromethane, chlorodibromomethane, and bromoform) from chlorination were investigated using aqueous humic acid (HA) solutions. The profile of the chloramine decay was also studied under various bromide ion concentrations. Monochloramine decayed in the presence of organic material and bromide ions. The percentage of chloroform and brominated THMs varied according to the TOC/Br- ratio. Total THMs (TTHMs) formation increased from 112 to 190 μg/L with the increase concentrations of bromide ions from 0.67 to 6.72 mg/L, but the chlorine-substituted THMs were replaced by bromine-substituted THMs. A strong linear correlation was obtained between the monochloramine dose and the formation of THMs for Cl:N ratios of 3:1 and 5:1. These ratios had a distinct effect on the formation of chloroform but had little impact on the formation of bromodichloromethane or chlorodibromomethane. The presence of bromide ions increased the rate of monochloramine decay. 相似文献
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The division operation is not frequent relatively in traditional applications, but it is increasingly indispensable and important
in many modern applications. In this paper, the implementation of modified signed-digit (MSD) floating-point division using
Newton-Raphson method on the system of ternary optical computer (TOC) is studied. Since the addition of MSD floating-point
is carry-free and the digit width of the system of TOC is large, it is easy to deal with the enough wide data and transform
the division operation into multiplication and addition operations. And using data scan and truncation the problem of digits
expansion is effectively solved in the range of error limit. The division gets the good results and the efficiency is high.
The instance of MSD floating-point division shows that the method is feasible. 相似文献