DO、BOD与COD的监测方法与相互关系探讨及其在海洋监测中的应用   总被引：8，自引：0，他引：8  

金兴良  刘丽  赵英  周凯  荆淼  庄峙厦  王小如 《海洋湖沼通报》2005,(1):43-48

本文简要综述了DO，BOD和COD的监测方法，指出集三者功能于一体的光纤传感器方法作为其新的发展方向。着重论述了三者之间的相互关系，并以实例证明这种相互关系依然存在于复杂的海洋环境中，有望通过集三者功能于一体的现场监测仪器来研究所存在的相互关系，建立起有机污染预防机制。  相似文献   

A Numerical Model for Mixing Areas of Pollutant Discharging into Tidal Flows     

Gu Jie  Kuang Cuiping Engineer  Nanjing Environmental Protection Research Institute  Nanjing . Senior Engineer  Doctor  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1996,(3)

- A combined numerical model for computing mixing areas of pollution vertical jet discharging into tidal flows has been developed. This numerical model is composed of a 2-D depth-averaged dynamic far-field numerical model and a 2-D vertical dynamic near-field numerical model. The former uses finite node method to compute velocity, and improved finite node method to compute pollutant concentration distribution; the latter is a k-e turbulence model, and uses SIMPLE (Semi-Implicit Method for Pressure Linked Equations) method to compute velocity. At the same time, the former provides boundary conditions for the latter. This model can simulate both far- field pollutant concentration distribution and near-field vertical recirculation quickly and precisely. This model has been verified by measured data of pollutant F of the Dachang reach of the Changjing River and test data presented by Chen el al. (1992). On the basis of verification, the authors use a designed hydrograph to compute this mixing area for a cer  相似文献   

烟台北部近岸海域水质(COD及油类)预测     

王学昌  郭耀同  孙英兰 《中国海洋大学学报(自然科学版)》1994,(Z1)

在该海域潮流数值计算的基础上,用二维乎流—扩散模型对烟台北部近岸海域进行了COD(化学耗氧量)及油类污染的数值计算,并对1995年和2000年两个年代的水质状况进行了预测。给出了该海区未来10年内海水水质状况的发展趋势。  相似文献   

盐度对废水生物处理的影响     

仝致琦  田守祥 《河南气象》2008,31(1):32-34

研究了废水中不同含盐量对生化处理效果以及生物学变化规律的影响。在废水含盐量低于22g／L时,废水生化处理系统对COD的去除率可稳定在70％左右,污泥活性良好;随着进水盐浓度的增加,含盐量达到22g／L时,污泥活性开始受到抑制,COD去除率急剧下降到50％左右;当废水含盐量达到31g／L时,污泥活性明显受到抑制,污泥絮体开始部分解体,COD去除率下降到40％左右。  相似文献   

COMPARISON OF THE ALKALI MARSH SOIL ANDAGRICULTURE SOIL ON NUTRIENT RETENTIONIN WESTERN JILIN, CHINA     

XU Xiao-feng  SONG Chang-chun  SONG Xia  YAN Bai-xing  WANG Yi-yong.WANG Guo-ping  ZHANG Yu-xiaNortheast Institute of Geography  Agricultural Ecology  CAS  Changchun    China The Institute of Geography Science  the Natural Resource Research  CAS  Beijing  China 《湿地科学》2003,1(2):147-152

An intact alkali marsh soil (MS) core and an agriculture soil (AS) core were studied by the simulated test in order to get the comparison of the nutrients retention in alkali MS and AS. The soil cores extracted from the Xiang-hai Wetland, western Jilin Province, China, were leached with solution contained carbon, nitrogen and phosphorus. Then the effluent water from the outlets of soil core with different depths was measured, including chemical oxygen demand (COD), total phosphorus (TP), phosphate (PO43-- P) and nitrogen existed as nitrate (NO3- - N), nitrite (NO2- - N) and ammonia nitrogen (NH4+- N) and the total nitrogen (TN) in the effluent water. COD and TP are decreased with the depth, the changing trends of TN, NO3- - N and NH4+ - N contents are similar to COD and TP, whereas NO2- - N in both MS and AS effluent have a little transition at 40cm depth. It is similar efficiency of MS to AS in significantly cutting down COD, TP, PO43- - P, TN, NO3- - N, NH4+ - N and NO2- - N in nutrient water. The fun  相似文献   

日本Kojima湖的富营养化     

YusakuNOGAMI 《云南地理环境研究》2002,14(2):51-55

日本Kojima湖现在每年的COD平均浓度大约是10mg/L，这是日本环境标准的两倍。COD颗粒的浓度被确定是与叶绿素a的浓度成比例的。另一方面，溶解COD的浓度与叶绿素a的浓度无关。因此，COD颗粒显然是被水藻增长引起的。此外，估计与Kojima湖富营养化相关的内部产物导致的COD的百分比是总COD的20％－30％。  相似文献   

碱性高锰酸钾法测量海水化学耗氧量(COD)不确定度的研究     

张世强 《海洋技术学报》2006,25(4):49-50,75

以葡萄糖 谷氨酸为海水COD的标准物质。用人工海水和标准物质配制成系列标准溶液。根据对系列标准溶液的测量结果,获得了碱性高锰酸钾法海水COD测量不确定度的分布规律。  相似文献   

太湖流域上游西苕溪支流的营养状态特征及成因分析     

王欢  袁旭音  陈海龙  许海燕  李正阳 《湖泊科学》2015,27(2):208-215

为了解太湖流域上游支流水体的营养状态特征及流域附近土地利用对水质的影响,选取了入湖水系西苕溪的10条主要支流进行了野外采样和实验室研究.研究结果表明,支流总磷(TP)、颗粒磷(PP)、总溶解性磷(TDP)、总氮(TN)、铵态氮(NH+4-N)、硝态氮(NO-3-N)含量季节间差异较大,TP含量范围为0.033~0.205 mg/L,PP含量范围为0.007~0.104 mg/L,TN含量范围为2.014~5.921 mg/L,NH+4-N含量范围0.021~1.659 mg/L,NO-3-N含量范围1.082~3.415mg/L,COD范围为6.5~15.5 mg/L.总体上呈现为枯水期平水期丰水期.部分支流受到不同程度的氮污染.利用水质参数进行聚类分析,可以将10条支流分成4类,其水体营养特征与周围环境相联系.支流营养盐、COD的通量明显受流量控制,表现为丰水期平水期枯水期.土地利用类型的差异是导致其水质变化的主要原因,耕地和居民地主要起源的作用,林地和草地主要起汇的作用.在丰水期和枯水期,对各指标影响最大的土地利用类型为耕地和林地;在平水期,对TP影响最大的是居民地,而对TN影响最大的是林地.  相似文献   

Dyeing and printing wastewater treatment using fly-ash coated with chitosan     

陈忻  孙恢礼 《中国海洋湖沼学报》2009,27(4):875-881

Printing and dyeing industry is a considerable source of environmental contamination. In this study treatment of printing and dyeing wastewater with a new type of sewage treatment agent, fly-ash coated with chitosan particles (FCCP), was examined. The effects of pH, stirring time, sedimentation time and temperature on color, COD, turbidity and NH₃-N removal were determined. The optimum dosage of FCCP and the influence of individual factors on removal efficiency were tested. The optimum parameters determined using the L₁₆(4⁵) orthogonal experiment were as follows: FCCP (weight ratio of chitosan to fly-ash 1:6) dosage, 4 g·L⁻¹; temperature, 35°C; pH, 4. The stirring time and sedimentation time were 20 min and 5 h, respectively. Under these optimum conditions, the color, COD and NH₃-N removal ratios were 97%, 80% and 75%, respectively.  相似文献   

MnO2-UV联用光化学降解苯酚废水的初步研究     

冯雄汉  张嵚  谭军凤  文慧  谭文峰  刘凡 《矿物岩石地球化学通报》2006,25(4):319-323

探讨了人工合成的高价锰氧化物与紫外光(UV)联用时降解苯酚废水的特性。结果表明,氧化锰矿物在无UV时对苯酚的降解能力差异大,1 g/L的氧化锰4 h对200 mg/L苯酚废水的降解率和COD去除率分别为:锰钾矿97.51%、酸性水钠锰矿89.07%、碱性水钠锰矿11.36%、钙锰矿9.67%;锰钾矿87.79%、酸性水钠锰矿53.11%、碱性水钠锰矿6.42%、钙锰矿1.43%。UV光照下,氧化锰矿物对苯酚的降解率有不同程度的提高,且表现出显著的表面光催化性质,增加了苯酚的深度降解,COD去除率显著提高。UV下氧化锰4 h对苯酚的降解率分别为:锰钾矿99.48%、酸性水钠锰矿91.86%、碱性水钠锰矿40.15%、钙锰矿35.95%);COD的去除率分别为:锰钾矿98.11%、酸性水钠锰矿68.45%、钙锰矿27.57%、碱性水钠锰矿24.27%。MnO2-UV联用时降解苯酚可能包括两种主要作用机制:氧化锰矿物的直接化学氧化降解和UV下MnO2的表面光催化降解。  相似文献