共查询到20条相似文献,搜索用时 93 毫秒
1.
电絮凝(EC)具有成本低、操作简单、无需添加药剂、污泥少以及无二次污染等优点。采用电絮凝技术处理模拟铬黑T(EBT)染料废水,研究了不同电解质及其浓度、电流密度、初始pH以及溶液初始浓度对染料废水的脱色率和化学需氧量(COD)去除率的影响。结果表明,该技术对染料废水的色度和COD的去除均有良好的去除效果,在纯Al板为电极,染料废水浓度为100 mg/L,极板间距为15 mm,NaCl浓度为0.75 g/L,电流密度为10 mA/cm2,溶液初始pH为6的实验条件下,电解20 min,脱色率可达97.5%,COD去除率为61.3%。电絮凝过程中不仅可以产生有较强吸附作用的絮体,还可以产生能够破坏染料分子中发色基团的强氧化性物质,从而降低废水的色度和COD含量。因此,电絮凝技术在染料废水的处理方面有一定的应用前景。 相似文献
2.
3.
悬浮态光催化超滤膜反应器处理4BS染料废水 总被引:6,自引:1,他引:5
选用光催化/超滤耦合技术处理含偶氮染料直接耐酸大红4BS的模拟废水,测试了不同pH条件下悬浮态TiO2对4BS染料的等温吸附效果,TiO2用量以及4BS初始浓度对光催化降解效果的影响,确定了各个操作参数的最佳值,并进行了不同超滤膜回收光催化出水中TiO2的试验.结果表明,TiO2对4BS的吸附效果在pH为5.5时最好.根据初始反应速率的计算,得出在50 mg·L-1的4BS溶液中加入1 g·L-1 TiO2的降解效果最佳,此时初始反应速率为3.13×10-7mmol·L-1·min-1,90 min染料浓度去除率可达到99%以上.PAN700和PVDF700两种超滤膜对光催化出水TiO2回收率均为99%以上,但PAN700比PVDF700通量大,120 min后通量仍可达214.0 L·m2·h-1,具有很好的实际应用前景. 相似文献
4.
5.
6.
钻井废水电絮凝浮选处理研究 总被引:10,自引:0,他引:10
针对油田钻井废水的特点,使用电絮凝浮法对其进行处理,确定了主要影响因素和较好的实验参数,并在此条件下对钻井废水进行处理,结果法浊率达96%,COD去除经达97.5%。实验证明电絮凝浮选法应用于钻井废水处理不但技术上可行,经济上也可行。并且该法操作简便,设备简单,易于自动化管理。 相似文献
7.
8.
9.
10.
11.
以对硝基苯胺和间(苯甲酰氨基-N,N-二乙酰氧乙基)苯胺为主要原料合成分散红135,并对其各项性能与进口同类产品进行了综合对比分析。结果表明,该产品各项指标均达到了进口产品的质量要求,完全可替代进口产品。 相似文献
12.
Ya‐Li Song Ji‐Tai Li Hua Chen 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(4):578-583
BACKGROUND: Pollution caused by industrial wastewater has become a common problem for many countries. In particular, dye pollutions from industrial effluents disturb human health and ecological equilibrium. The discharge of highly colored synthetic dye effluents is aesthetically displeasing and can damage the receiving water body by impeding penetration of light. Azo dyes can be reduced to more hazardous intermediates on anaerobic conditions. Therefore, an effective and economic treatment of effluents containing a diversity of textile dyes has become a necessity for clean production technology for textile industries. Herein we wish to report the degradation of Acid Red 88 by the combination of Fenton's reagent and ultrasound irradiation. RESULTS: The results show that the combination of ultrasonic irradiation and Fenton's reagent is effective for the degradation of Acid Red 88 aqueous solution. Furthermore, it can achieve better results than either Fenton's reagent or ultrasound alone. The optimum conditions for the degradation of Acid Red 88 aqueous solution were 1.96 mmol L?1 H2O2, 0.108 mmol L?1 Fe2+, pH 3.0, and ultrasonic irradiation frequency of 40 kHz. A degradation efficiency of 98.6% was achieved within 135 min. CONCLUSION: We have provided an efficient and convenient procedure for the degradation of Acid Red 88 aqueous solution. In the present procedure, the azo linkage of Acid Red 88 is broken and some carbonyl compounds are formed, but the complete mineralization of dye cannot be achieved. Copyright © 2008 Society of Chemical Industry 相似文献
13.
对直接耐晒翠蓝GL传统生产工艺中的盐析进行了彻底改革。用两次沉降取代了两次盐析,用少量絮凝剂取代了大量的氯化钠,工业废水的治理也得到了简化。 相似文献
14.
讨论了主要合成条件和表面活性剂对C.I.颜料红146性能的影响。结果表明:合成C.I.颜料红146的较好工艺条件为:顺式偶合,偶合时间1小时,偶合结束pH为5.0,升温至90℃,保温30分钟,产品在80℃下干燥。添加表面活性剂后可得到色光偏蓝,着色力较高,分散性较好的C.I.颜料红146产品。 相似文献
15.
以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactive Red241模拟染料废水的脱色率可达到86%以上;在p H=7,U=14V、I=3.2A、t=25min的条件下,C.I.Disperse Blue 56模拟染料废水的脱色率可达到79以上%。 相似文献
16.
17.
综述了C.I.颜料红48系列色淀颜料在塑料、印刷油墨、粉末涂料、喷墨墨水、静电照相滤光片等领域的应用。随着应用领域的不断拓宽,对其提出了更高的性能要求,通过颜料的表面改性可提高颜料的应用性能。有22篇参考文献。 相似文献
18.
19.
对C.I.直接蓝199的老工艺进行了改进。使铜酞菁与氯磺酸的反应温度由原来的130℃升至140℃左右,之后与氯化亚砜的反应温度由60~65℃提高到80℃,而且滴加氯化亚砜的时间从2~2.5延长至4小时,同时氨解用的氨水用有机碱替代。新工艺解决了此染料用于墨水时在盐析前膜过滤困难的问题。 相似文献
20.
This study investigates the dispersions of 1 wt.% C.I. pigment violet 23 particles in propylene glycol monomethyl ether acetate (PGMEA) using a supercritical fluid-assisted dispersion process (SFAD). The favorable formulation of dispersants is a blend of 40% AJISPER PB821 and 10% FC-4430 in a PGMEA medium. The SFAD processes holding at the supercritical state are good for improving dispersion. Under favorable conditions, 328.2 K and 20 MPa, the mean size of pigment dispersoid with blended dispersants in PGMEA is as small as 175 nm that meets the required range of 100-200 nm in industrial applications. The TGA analyses indicate the adsorbed amount of blended dispersants (40% PB821 and 10% 4430) on the surface of pigment particles in the PGMEA medium is about 1.77 mg/m2. Thus, the transmittances, color analyses, and TEM images of pigment dispersoids prove that the SFAD process can disperse pigment particles in PGMEA. 相似文献