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VUV/UV/Cl2工艺去除饮用水中的乐果
VUV/UV/Cl2 乐果 去除 饮用水处理
2020/11/20
乐果是常规饮用水处理技术难以去除的一种典型有机磷农药。为了能够控制并去除饮用水中的农药残留，达到进一步净化水质的目的，建立了降解动力学模型，采用模拟降解饮用水中乐果的方法，对比了乐果在紫外(UV)、氯(Cl2)、紫外/氯(UV/Cl2)、真空紫外/紫外(VUV/UV)和真空紫外/紫外/氯(VUV/UV/Cl2) 5种工艺下的去除效果，并考察了乐果初始浓度、Cl2投加量、溶液pH、水中共存天然有机物...
利用波长为254 nm的紫外灯活化过氧化氢（H2O2）氧化降解美罗培南（MPN），考察了H2O2投加量、初始pH值、水中常见共存阴离子（Cl-、HCO3-、NO3-）和天然有机化合物（NOM）等重要影响因素对MPN降解的影响.结果表明，紫外光功率为4 W，初始pH为7.0，n（H2O2）/n（MPN）=20：1时，反应20 min后，MPN的降解率达到97.8%.H2O2投加量的增加会加快MPN的...
以中压汞灯为光源,研究水环境中吲哚美辛(IDM)的紫外光降解机制.实验结果表明,IDM的光解反应符合准一级动力学规律,其降解速率常数随自身浓度的增大而减小,当IDM浓度由1 mg·L-1增至12 mg·L-1时,其速率常数由0.0148 min-1减至0.00412 min-1.通过模型研究IDM的紫外光解机制时发现,其降解包括直接光解和自敏化光解,直接光解常数为0.0151 min-1.研究环境...
本研究采用O3/UV工艺降解喹啉溶液，系统地探讨了喹啉初始浓度、反应后置时间、初始pH、HCO3-浓度等因素对降解过程的影响. 通过测定降解过程中的中间产物，分析了喹啉的降解机制及途径. 结果表明随着喹啉初始浓度增加，反应表观速率常数和去除率都降低；pH（7~9）碱性条件时降解效果最好；HCO3-的存在明显降低了喹啉的去除率，加入100 mg·L-1 HCO3-喹啉去除率降低了42.01%；反应后...
表面活性剂是一类特殊的有机污染物,在去污、洗衣、印染等废水中广泛存在.本文以某电厂实用的5种去污剂为研究对象,考察了UV/H2O2对5种去污剂的矿化能力,研究了H2O2和去污剂初始浓度、初始pH值、去污剂种类、辐照时间等因素对氧化效果的影响.结果表明,5种去污剂在254 nm处均无较强吸收,单独UV辐照对其降解效果不明显.当去污剂初始DOC浓度为50 mg·L-1,H2O2最佳投加量为1 mL·L...
UV Light Induced Transformation of 1-Methylnaphthalene in the Presence of Air and Its Implications for Contaminants Research
Transformation Products 1-Methylnaphthalene UV Light Photo-Oxidation Contaminants Research
2013/3/12
Understanding chemical transformations of contaminants and the resulting products is extremely important in devising proper monitoring methods for such contaminants and in assessing potential human ex...
为探究干旱和增强UV-B辐射对3种胡枝子(美丽胡枝子、二色胡枝子、牛枝子)抗氧化酶活性和渗透调节物质的影响,采用盆栽试验,研究了正常生长(CK)、干旱胁迫(D)、增强UV-B辐射(UV-B)及二者复合胁迫(D+UV-B)下各植物叶片中抗氧化酶活性和渗透调节物质的动态响应.结果表明: 3种处理下各植物叶片中SOD活性较对照值均呈先下降后上升趋势,且与单因子处理相比,牛枝子和二色胡枝子在复合胁迫下其S...
UV-Fenton催化氧化法对采油废水中多环芳烃的处理效果
采油废水 多环芳烃 UV-Fenton
2012/10/31
针对采油废水中含有多环芳烃种类多且较难去除的特点,采用UV-Fenton技术对采油废水中多环芳烃的处理效果进行了研究,通过正交实验和单因素实验,研究了在254 nm波长紫外光照射下,Fe2+投加量、H2O2投加量、pH值和光照时间对水样中多环芳烃中的菲和芴处理效果的影响。实验结果显示,处理初始浓度为1 000 μg/L的菲、芴时,反应的最佳工艺条件为:Fe2+浓度为1.8 mmol/L、H2O2投...
Comparison of UV-B Broadband Brewer Measurements with Irradiances from Surface-Based and Satellite-Based Models
Department of Geography, University of Winnipeg, Winnipeg, Canada School of Geography and Earth Sciences, McMaster University, Hamilton, Canada
2013/2/26
UV-B irradiance can be estimated from surface meteorological data or from satellite measurements. This paper compares irradiance estimates from the Davies surface-based radiation model and the Canada ...
Validation of Spectral and Broadband UV-B (290 - 325 nm) Irradiance for Canada
Modelling UV-B Radiation DISORT Delta-Eddington
2013/2/26
Stratospheric ozone depletion, as a result of increasing chlorofluorocarbons in the stratosphere, allows more UV-B irradiance (290 - 325 nm) to reach the earth’s surface with possible detrimental biol...
Correlative Study between UV Irradiance and TOC Using AURA OMI at Kannur (12.3N, 75.4E)
UV Irradiance Aura OMI Total Ozone Column Sun Burn
2013/2/26
The solar UV radiation has prominent impacts on human life, animals and plants with positive and negative effects. Atmospheric ozone, which is formed from the photodissociation of molecular oxygen mai...
Aerosol Charging Using Pen-Type UV Lamps
Nanoparticle charging UV charger UV irradiation intensity
2016/3/28
A portable aerosol charger utilizing pen-type Hg lamps was constructed to investigate the particle charging process under
UV irradiation. The charger primarily consisted of a quartz tube surrounded b...
Assessment of Long Term UV Radiation Measured by the Brewer Spectrophotometer in Hong Kong during 1995-2005
UV Radiation Brewer Spectrophotometer TOMS Hong Kong
2013/2/26
Time series of daily UV radiation measured by the ground-based Brewer spectrophotometer #115 in Hong Kong during 1995-2005 were studied through statistics analysis, with focus on the variability and l...
UV-Fenton体系预处理四氢呋喃废水实验研究
UV-Fenton体系 四氢呋喃废水 预处理 可生化性
2012/6/20
采用UV-Fenton体系预处理四氢呋喃废水，实验结果表明，pH值、反应时间、Fe2+和H2O2投加量等因素对处理效果有较大的影响。实验确定的最佳反应条件为：原水pH=5，Fe2+投加量2.5 mmol/L，H2O2投加量12 mmol/L，反应时间90 min，连续曝气，在此条件下，COD去除率可达85%左右。经UV-Fenton体系处理后，废水的B/C值由0.16增至0.47，可生化性提高，可...
Immobilization of cadmium in soils by UV-mutated Bacillus subtilis38 bioaugmentation and NovoGro amendment
Bioaugmentation Cadmium NovoGro Amendment Remediation
2013/12/12
Immobilization of cadmium (10 mg Cd per kilogram soil) in soil by bioaugmentation of a UV-mutatedmicroorganism,Bacillus subtilis38 accompanied with amendment of a bio-fertilizer, NovoGro was inves-tig...