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采用逆流洗涤方式有效减轻酸污染。含铜酞菁废水采用铁炭微电解预处理技术 ,树脂废水采用物化预处理技术 ,再通过厌氧水解———SBR好氧生化处理技术的工艺流程 ,成功地治理了该有机化工废水 ,出水达到国家排放标准 相似文献
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Physical and chemical regeneration of zeolitic adsorbents for dye removal in wastewater treatment 总被引:4,自引:0,他引:4
Natural zeolite and synthetic zeolite, MCM-22, were employed as effective adsorbents for a basic dye, methylene blue, removal from wastewater. Two methods, Fenton oxidation and high temperature combustion, have been used for regeneration of used materials. It is found that MCM-22 exhibits equilibrium adsorption at 1.7 x 10(-4) mol g(-1), much higher than the adsorption of natural zeolite (5 x 10(-5) mol g(-1)) at initial dye concentration of 2.7 x 10(-5)M and 30 degrees C. Solution pH will affect the adsorption behaviour of MCM-22. Higher solution pH results in higher adsorption capacity. The regenerated adsorbents show different capacity depending on regeneration technique. Physical regeneration by high temperature combustion will be better than chemical regeneration using Fenton oxidation in producing effective adsorbents. Regeneration of MCM-22 by high temperature treatment can make the adsorbent exhibit comparable or superior adsorption capacity as compared to the fresh sample depending on the temperature and time. The optimal temperature and time will be 540 degrees C and 1h. The Fenton oxidation will recover 60% adsorption capacity. For natural zeolite, regeneration can not fully recover the adsorption capacity with the two techniques and the regenerated natural zeolites by the two techniques are similar, showing 60% adsorption capacity of fresh sample. Kinetic studies indicate that the adsorption follows pseudo-second-order kinetics. 相似文献
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直接电解法处理染料废水的研究 总被引:3,自引:0,他引:3
实验以Ti为基体 ,分别采用热分解法和阳极电沉积法制备了SnO2 和PbO2 电极。用XRD、SEM、XPS和稳态极化、循环伏安法分别对上述电极进行结构特性表征和电化学特性检测。实验结果表明 ,在相同工作条件下 ,SnO2 电极的析氧电势比PbO2 电极高 30 0~ 5 0 0mV ,且其作为阳极降解的直接染料 (直接橙S和直接耐晒黑G)模拟废水COD值下降速度快。在模拟染料废水处理体系中 ,提高反应温度有利于染料的降解。SnO2 电极阳极氧化染料溶液过程中 ,能定性检测到降解产物———CO2 。 相似文献
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Dina A. Yaseen Miklas Scholz 《Environmental science and pollution research international》2017,24(19):16031-16040
This study compares the performance of simulated shallow ponds vegetated with Lemna minor L. under controlled and semi-natural conditions for the treatment of simulated wastewater containing textile dyes. The objectives were to assess the water quality outflow parameters, the potential of L. minor concerning the removal of chemical oxygen demand (COD) and four azo dyes (Acid blue 113, reactive blue 198, Direct Orange 46 and Basic Red 46) and the plants’ growth rate. Findings show that all mean outflow values of COD, total dissolved solids (TDS) and electrical conductivity (EC) were significantly (p < 0.05) lower within the outdoor compared to the indoor experiment except the dissolved oxygen (DO). The COD removal was low for both experiments. The outflow TDS values were acceptable for all ponds. The pond systems were able to reduce only BR46 significantly (p < 0.05) for the tested boundary conditions. Removals under laboratory conditions were better than those for semi-natural environments, indicating the suitability of operating the pond system as a polishing step in warmer regions. The mean outflow values of zinc and copper were below the thresholds set for drinking and irrigation waters and acceptable for L. minor. The dyes inhibited the growth of the L. minor. 相似文献
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电催化氧化法处理染料废水的影响因素及动力学 总被引:1,自引:0,他引:1
以钛涂膜极板为阳极、石墨极板为阴极、Fe2O3/γ-Al2O3为多相催化剂,构建电-多相催化氧化体系,研究了该体系对酸性大红模拟染料废水中COD的去除效果及其影响因素,优化了实验条件,并初步探讨了COD的降解机理。结果表明,在槽电压20 V,pH 4,曝气量0.24 m3/h,极板间距3 cm的条件下,COD的去除率最高,达到64.5%;COD的降解近似符合一级动力学方程:ln(C0/C)=0.0034t+0.719。在电-多相催化氧化体系中,废水中的有机物被直接矿化或降解为小分子有机物。 相似文献
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零价铁复合有机膨润土处理染料废水的研究 总被引:1,自引:0,他引:1
针对目前印染废水处理现状及膨润土在水处理中回收困难等问题,提出将零价铁复合到有机膨润土中制成零价铁复合有机膨润土(ZVI-OB),以达到高效吸附并降解污染物的目的。以染料废水(Orange II) 作为研究对象,考察了废水中染料的初始浓度、pH以及吸附时间对ZVI-OB去除染料效率的影响,并研究了吸附后降解过程中时间和pH对污染物降解的影响以及降解前后膨润土层结构的变化。研究结果表明,ZVI-OB相对于CTMAB改性的有机膨润土而言,其吸附量有所降低,但ZVI-OB在吸附污染物之后能有效降解有机物。ZVI-OB在饱和吸附Orange II后经催化氧化,总有机碳含量降低为原来的19%,可以重复利用。 相似文献
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A solid waste from manganese dioxide industry was studied for possible use to remove color from dye containing effluents. Artificial mixtures with direct, basic and acid dyes were studied. This material was found to be an effective adsorbent for the class of direct dyes. 相似文献
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三维电极-好氧生物法联合处理酸性染料废水模拟研究 总被引:1,自引:0,他引:1
采用电解-好氧生物法联合处理酸性大红G模拟废水,三维电解反应器填料为活性炭与玻璃珠混合物,平板电极材料为石墨,通过正交实验确定的最佳实验条件为:电解时间150min,活性炭/玻璃珠体积比为2:1,槽电压20V、pH为5、Na2SO4投加量1.5g/L,进水初始浓度2000mg/L。此时COD去除率及色度去除率分别可达49.78%和81.45%,废水BOD,/COD由0.12提高到0.42。电解后的废水采用生物接触氧化法处理12h后,出水COD为48mg/L,色度120倍,达到综合污水排放二级标准。 相似文献
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采用溶胶-凝胶法制备了Fe,Ce-TiO2/Ti膜电极,通过正交实验考察了该电极的最佳制备条件为550 ℃煅烧、掺杂摩尔比n(Fe:Ti)=6%和n(Ce:Ti)=3%。其X射线衍射(XRD)和紫外-可见漫反射(DRS)分析表明,催化剂晶型为锐钛矿,Fe、Ce掺杂抑制了晶粒的生长和金红石相的生成,使催化剂有明显的可见光响应。以Fe,Ce-TiO2/Ti为光阳极,Cu为阴极,并以微生物燃料电池(MFC)为外加电源,组装MFC电助Fe,Ce-TiO2/Ti-Cu光催化反应器,在可见光下光电催化(MPEC)处理活性艳红X-3B(RBR)。MPEC与自生电场光电催化(SPEC)和外加电场光电催化(PEC)的对比结果表明MPEC是可行的,它比SPEC的脱色率高9%,与PEC相当,但能耗更低。考察了MPEC的主要影响因素,得出最佳条件为2组MFC串联,废水流量80 mL·min-1,废水初始pH 2.56。在太阳光下,MPEC能使RBR有效脱色,处理100 min的脱色率可达87%。紫外-可见分光光谱分析表明,MPEC能使RBR的发色基团迅速遭到破坏。 相似文献
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采用负载经驯化后微生物的活性炭深度处理实际印染废水,研究生物活性炭系统中存在的生物相及其降解有机污染物的作用,并表征了处理后印染废水的生物毒性。结果表明,生物相中含有草履虫、轮虫及钟虫等原生动物。随着运行次数的增加,活性炭反应器在运行5次后出水的COD、NH3-N及色度去除率骤降,但是生物活性炭处理后出水的COD、NH3-N及色度去除率缓慢下降。生物活性炭能很好地降解印染废水中的苯酚类和稠环芳烃污染物。本研究中生物活性炭反应器对氨氮和COD的去除符合一级动力学方程,去除动力学常数分别为1.02和0.96。经过生物活性炭的处理可以将印染废水的生物毒性降到适于小球藻生长的水平。 相似文献
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Fate and transformation of naphthylaminesulfonic azo dye Reactive Black 5 during wastewater treatment process 总被引:1,自引:0,他引:1
Xingzu Wang Xiang Cheng Dezhi Sun Yiwei Ren Guihua Xu 《Environmental science and pollution research international》2014,21(8):5713-5723
Certain aromatic amines generated by the decolorization of some azo dyes are not removed substantially by conventional anaerobic–aerobic biotreatment. These aromatic amines are potentially toxic and often released in the wastewater of industrial plants. In this study, the fate and transformation of the naphthylaminesulfonic azo dye Reactive Black 5 (RB5) during different phases of a sequencing batch reactor were investigated. The major products of RB5 decolorization during the anaerobic phase include 2-[(4-aminophenyl)sulfonyl]ethyl hydrogen sulfate (APSEHS) and 1-2-7-triamino-8-hydroxy-3-6-naphthalinedisulfate (TAHNDS). During the aerobic phase, APSEHS was hydrolyzed and produced 4-aminobenzenesulfonic acid, which was further degraded via dearomatization. TAHNDS was transformed rapidly via auto-oxidation into TAHNDSDP-1 and TAHNDSDP-2, which were not further removed by the activated sludge during the entire 30-day aerobic phase. In contrast, different behaviors of TAHNDS were observed during the anoxic phase. The transformation of TAHNDS was initiated either by deamination or desulfonation reaction. TAHNDS was then converted into 3,5-diamino-4-hydroxynaphthalene-2-sulfonic acid, which was subsequently removed via ring cleavage reaction under aerobic condition. In conclusion, complete degradation of TAHNDS by activated sludge occurs only during anoxic/aerobic processes instead of the conventional anaerobic/aerobic processes. 相似文献