共查询到19条相似文献,搜索用时 359 毫秒
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电催化氧化法处理阳离子染料废水的试验研究 总被引:2,自引:0,他引:2
以结晶紫作为阳离子染料,采用电催化氧化法对阳离子染料溶液进行了电解脱色处理试验,研究了电流密度、电解质种类、电解质浓度、pH值等对该溶液脱色率的影响,测定了电解时溶液中生成的余氯浓度和溶液的紫外-可见吸收光谱曲线,并对不同电解时间的溶液的吸光度进行了归一化计算。结果表明:随着电解时间的延长,水溶液中活性氯浓度不断上升,经一定时间后达到最大值;在电催化和活性氯的协同作用下,阳离子染料结晶紫分子中的大π共轭体系被破坏、苯环结构基本瓦解,溶液快速脱色;在电流密度为5.1mA/cm2、NaCl浓度为4g/L、pH值为9.41的条件下,初始浓度为100mg/L的结晶紫溶液经过20min的电解,其脱色率可高达98.31%。 相似文献
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分别以活性炭纤维(ACF)为阳极和阴极,在无隔膜电解槽中研究了利用成对电解降解蒽醌染料活性艳蓝KN-R脱色过程的影响因素。考察了染料初始浓度、支持电解质Na2SO4、pH及温度诸条件对脱色性能的作用。结果表明:适当增加染料初始浓度和支持电解质浓度,酸性和中性条件以及适中的温度均对成对电解脱色性能有利。当染料初始浓度为251mg/L,在合适的处理条件下,脱色率达到95%,脱除单位质量染料电耗仅为1.22kWh/kg染料。 相似文献
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研究采用铁为阳极电化学法处理直接黄11染料模拟废水脱色性能的影响进行研究。影响因素包括:电流密度、pH值、染料浓度和电解质浓度。研究结果表明,电流密度大有利于染料废水脱色,但能耗消耗大;初始溶液在中性条件下不仅取得很好的处理效果,而且脱色能耗较低;随着染料初始浓度增加脱色率和脱色能耗降低的趋势;随着电解质浓度升高染料脱色率下降的趋势,脱色能耗先减少,然后缓慢增大。在染料初始浓度50 mg/L、pH值为7.11、电流密度2.083 mA/cm2、电解质Na2SO4浓度0.01 mol/L、温度20℃、搅拌速度600 r/min、电解时间60min条件下,脱色率达到92.2%,脱色能耗1.709 kW.h/kg染料。 相似文献
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铁阳极电凝聚法处理活性红241染料废水能耗分析 总被引:1,自引:0,他引:1
对铁阳极电凝聚处理活性红241染料废水过程影响电能消耗的影响因素进行了考察.结果表明:电流密度、染料废水初始pH、染料废水温度、电解质浓度以及染料浓度的变化均能对能耗和脱色效率产生较大影响;电流效率受电流密度、染料废水初始pH、电解质浓度的影响较大,受染料废水温度和初始浓度影响不大;对于浓度为50 mg/L的活性红241染料废水,在电流强度为12.5 A/m2、电解温度为25 ℃、硫酸钠浓度为0.01 mol/L、pH为7.53、电解时间为60 min的实验条件下,染料废水脱色率达92.7%,电能消耗为1.53kWh/kg dye,电流效率为94.2%. 相似文献
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染料废水的内电解脱色处理研究 总被引:26,自引:0,他引:26
采用铁屑内电解法对5大类11种模拟染料废水和印染废水进行了内电解混凝处理,得出了内电解法处理染料废水的最佳工艺条件,探讨了脱色机理,并在实际印染废水处理工程中得到有效应用。研究表明,对中等色度和浓度的模拟染料废水,脱色率均在77%以上,在实际印染废水处理工程中采用混凝和内电解联合处理工艺,脱色率可达96%以上。 相似文献
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采用好氧驯化活性污泥对5种不同结构阳离子染料的生物脱色效果进行了动态观察,并在不同醋酸浓度下对脱色效果的影响进行了研究,结果表明,在好氧条件下,活性污泥对阳离子染料的脱色率较高,阳离子红GTL和阳离子艳蓝2RL(浓度为2 0mg L)的脱色率分别达93%和98% ;提高污泥浓度对染料脱色率的影响不明显;醋酸(2 0 0~12 0 0mg L)和染料(2 0~10 0mg L)浓度的改变对阳离子红2GL、阳离子红GTL、阳离子艳蓝2RL、碱性绿染料的脱色率影响不大,揭示这几种结构阳离子染料的生物脱色是吸附和后续生物降解共同作用的结果;而随醋酸浓度增加,阳离子红6B的脱色率增加,是与醋酸产生共代谢作用的结果。 相似文献
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《环境科学文摘》2006,(2)
X791.03200601051不同结构阳离子染料好氧生物脱色性能的研究/刘正芹(东华大学)…∥环境工程/冶金部建筑研究总院.-2005,23(3).-24~26环图X-26采用好氧驯化活性污泥对5种不同结构阳离子染料的生物脱色效果进行了动态观察,并在不同醋酸浓度下对脱色效果的影响进行了研究,结果表明,在好氧条件下,活性污泥对阳离子染料的脱色率较高,阳离子红GTL和阳离子艳蓝2RL(浓度为20mg/L)的脱色率分别达93%和98%;提高污泥浓度对染料脱色率的影响不明显;醋酸(200~1200mg/L)和染料(20~100mg/L)浓度的改变对阳离子红2GL、阳离子红GTL、阳离子艳蓝2RL、… 相似文献
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The amidoximated polyacrylonitrile (PAN) fiber Fe complexes were prepared and used as the heterogeneous Fenton catalysts for the degradation of 28 anionic water soluble azo dyes in water under visible irradiation. The multiple linear regression (MLR) method was employed to develop the quantitative structure property relationship (QSPR) model equations for the decoloration and mineralization of azo dyes. Moreover, the predictive ability of the QSPR model equations was assessed using Leave-one-out (LOO) and cross-validation (CV) methods. Additionally, the effect of Fe content of catalyst and the sodium chloride in water on QSPR model equations were also investigated. The results indicated that the heterogeneous photo-Fenton degradation of the azo dyes with different structures was conducted in the presence of the amidoximated PAN fiber Fe complex. The QSPR model equations for the dye decoloration and mineralization were successfully developed using MLR technique. MW/S (molecular weight divided by the number of sulphonate groups) and NN=N (the number of azo linkage) are considered as the most important determining factor for the dye degradation and mineralization, and there is a significant negative correlation betweenMW/S or NN=N and degradation percentage or total organic carbon (TOC) removal. Moreover, LOO and CV analysis suggested that the obtained QSPR model equations have the better prediction ability. The variation in Fe content of catalyst and the addition of sodium chloride did not alter the nature of the QSPR model equations. 相似文献
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Bing Sun Nyein Nyein Aye Zhiying Gao Dan Lv Xiaomei Zhu Masayuki Sato 《环境科学学报(英文版)》2012,24(5):840-845
The pulsed high-voltage discharge is a new advanced oxidation technology for water treatment. Methyl Orange (MO) dye wastewater was chosen as the target object. Some investigations were conducted on MO decoloration including the discharge characteristics of the multi-needle reactor, parameter optimization, and the degradation mechanism. The following results were obtained. The color group of the azo dye MO was effectively decomposed by water surface plasma. The decoloration rate was promoted with the increase of treatment time, peak voltage, and pulse frequency. When the initial conductivity was 1700 μS/cm, the decoloration rate was the highest. The optimum distance between the needle electrodes and the water surface was 1 mm, the distance between the grounding electrode and the water surface was 28 mm, and the number of needle electrodes and spacing between needles were 24 and 7.5 mm, respectively. The decoloration rate of MO was affected by the gas in the reactor and varied in the order oxygen > air> argon > nitrogen, and the energy yield obtained in this investigation was 0.45 g/kWh. 相似文献
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研究了颗粒活性炭非均相活化过二硫酸盐和过一硫酸盐对水中偶氮染料酸性橙Ⅱ的降解效果。考察了过硫酸盐投加量、活性炭投加量、溶液初始pH值和无机阴离子对酸性橙Ⅱ降解率的影响,探究了不同过硫酸盐对染料降解效果差别的原因。结果表明:投加过二硫酸盐比过一硫酸盐的效果更好,偶氮染料浓度为20 mg/L,溶液中过n(PS)∶n(AOⅡ)为200∶1时降解率最高;颗粒活性炭投加量的增加有利于染料的去除,溶液处于酸性条件下染料降解率高于碱性条件,无机阴离子对酸性橙Ⅱ降解有抑制作用,产生于活性炭表面的自由基对染料的降解具有重要作用。 相似文献
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文章首次尝试以新颖筛选方法对台湾及大陆两岸当地微生物自然生态中,以非偶氮染料脱色作为优势筛选条件,以筛选出可有效电子传递于非偶氮染料RB198脱色的混菌,再进行优势纯化分离,以得到可对非偶氮染料具有强电子传递脱色能力的菌株。再藉此特性来研究其对偶氮染料电子传递生物脱色的特性。结果表明,通过脱色测试及蛋白质电泳初步筛选出4种对非偶氮染料RB198具有较优异脱色能力的菌株,并进行16S rRNA分析,此4株纯菌分别为Microvirgula aerodenitrificans,Acinetobacter guillouiae,Pseudomonas sp.,Rahnella aquatilis。其中Rahnella aquatilis DX2b,Microvirgula aerodenitrificans SH7b为脱色新菌株,文章首度发表其具有脱色性能,对非偶氮染料RB198及偶氮染料RB160,OrangeⅠ有优异脱色能力。 相似文献