混合染料化工废水的物化-生化联合处理工艺研究

用物化(混凝沉淀)一生化(SBR)工艺联合处理混合染料化工废水。结果表明,混合废水经过预处理、一级物化处理、SBR生化处理以及二级物化处理后,COD、NH3-N和色度去除率均达90％以上,最终出水各项指标均达到国家二级排放标准,证明物化一生化联合工艺是一种处理混合染料化工废水的有效途径。     

Fe3+/TiO2光催化剂降解孔雀绿染料的研究

采用快速溶胶法制备纳米TiO2光催化剂,用Fe^3 对其掺杂改性,并进行了催化剂的X-射线衍射分析(XPd3),傅立叶红外光谱分析(FT-IR),BET比表面积的表征,用于光催化降解水中孔雀绿染料的研究．研究了不同催化剂的光催化活性,确定了光催化剂的用量．结果发现60W紫外光辐射80min,孔雀绿可以彻底降解;可见光下,光催化剂对孔雀绿降解120h,其转化率为98%,COD的去除率为75．3%。可见光下孔雀绿的脱色率和COD的变化不一致,并对其产生的原因和孔雀绿的光催化降解机理作了探讨。孔雀绿的光催化降解符合一级动力学反应规律,反应速率常数随催化剂的用量增加而增大,但增大幅度逐渐减小。     

近年美国染料工业概况

美国染料工业持续下滑,染料产量由2000年的16.6万吨下降到2003年的11.9万吨,占世界染料总量的9.7%,生产的染料有24%出口;其价格连续走低;染料的消费量也逐年下滑,2003年的表观消费量为18.4万吨,折百约为13.2万吨,消费量为世界消费总量的12.7%,其中进口量超过50%,在进口染料中超过40%来自中国和印度。在美国进行化学合成的染料只有酸性和活性,其余均为进口原染料进行加工或商品化,占染料生产量的75%～80%。经过6年的分化重组,美国染料生产商的主体是德司达、汽巴和科莱恩等跨国公司。纺织印染工业萎缩和进口冲击、染料产品利润空间的急剧缩小、环境因素是造成美国染料工业不景气的主要原因。     

Synthesis of chemically modified chitosans with a higher fatty acid glycidyl and their adsorption abilities for anionic and cationic dyes

Novel chitosan‐based materials with a higher fatty acid glycidyl as the chemically modified agent were synthesized and the adsorption ability of the resulting polymers has been evaluated for typical anionic and cationic dyes. The successful modification was confirmed by the infrared spectroscopic measurements. As the degree of substitution was decreased, the adsorption ability of the chemically modified chitosans for anionic dyes at the higher dye concentration was increased, and the modified chitosans with a lower degree of substitution showed a higher adsorption ability than that of an activated carbon at the higher dye concentration. For cationic dyes, the chemically modified chitosan showed a good adsorption power, especially when the adsorption power was evaluated by the flow methods. The improved adsorption ability of a chemically modified chitosan material was also confirmed by comparing it with that of a crosslinked chitosan material. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 2423–2428, 2005     

高效液相色谱法测定化妆品中的3种植物染料

为加强染发剂中植物成分的安全监督管理,建立了化妆品中棓酸、二苯乙烯苷、指甲花醌的高效液相色谱(HPLC)检测方法.样品经甲醇+四氢呋喃(1+1)溶解分散,用超声提取,C18色谱柱分离,甲醇+质量分数0.05％甲酸水溶液为流动相,梯度洗脱,检测波长为276 nm.这3种物质的方法检出质量浓度为0.05～0.1 mg/g,...     

Co3O4/4A分子筛活化PMS处理高盐AO7废水研究

采用浸渍-焙烧法制备Co₃O₄/4A分子筛复合催化剂,用于活化过一硫酸盐（PMS）处理高盐酸性橙7（AO7）废水。采用扫描电镜、X-射线衍射仪、红外光谱仪等对复合催化剂进行表征,同时考察其稳定性。考察复合催化剂活化PMS对AO7模拟废水的处理效果,结果表明,当Co₃O₄/4A分子筛投加量为0.2 g/L、PMS投加量为0.7 mmol/L、pH为9时,高盐（Na₂SO₄,10 g/L）废水中AO7浓度可在20 min内由15 mg/L左右降至接近0,去除率达99%以上,同时催化剂钴离子溶出量约为0.36 mg/L,低于《地表水环境质量标准》（GB3838-2002）中规定的1 000μg/L。     

Integrated LaB6/g-C3N4 solar absorber for solving dye accumulation during solar steam generation

Solar steam generation has attracted considerable interest due to its easy accessibility and sustainability. However, dye molecules were gradually concentrated on bulk water or the surface of solar absorbers during the disposal of dye wastewater. Herein, LaB₆/g-C₃N₄ composites were immobilized on porous cotton cloth, served as a solar absorber resistant to dye clogging. The optimal solar absorber possessed solar harvesting of 92.3% and showed great application potential in the field of the treatment of dye wastewater. This study presented a new approach for the treatment of dye wastewater.     

研究固井材料防窜及动态性能的方法及装置

为了探讨射孔时水泥环破裂原因,系统地进行水泥环防窜、抗窜的综合试验研究,我们设计了模拟固井射孔的综合试验装置,及多功能材料动态性能测试装置。本文主要介绍这二种装置的设计思想、试验方法等。     

氧化石墨烯复合膜的制备及其在水体中脱除染料的性能

为同时提高氧化石墨烯(GO)膜的稳定性及分离性能,以戊二醛为交联剂,引入聚乙烯醇(PVA)和二氧化钛(TiO2),采用真空辅助过滤法制备了TiO2/GO/PVA复合膜,通过SEM、TEM、FTIR、XRD对复合膜的形态结构进行表征,并通过接触角仪、错流装置和超声实验测试膜对染料的分离性能及稳定性.结果表明:随着TiO2...     

3,3'-diethylthiatricarbocyanine iodide: a highly sensitive chiroptical reporter of DNA helicity and sequence

Using UV-vis absorption and circular dichroism (CD) spectroscopies, we explored the binding interactions of 3,3'-diethylthiatricarbocyanine iodide (Cy7) with polynucleotides of different sequences and helicity. CD showed to be a very diagnostic tool giving different spectroscopic chiroptical signatures for all explored DNA sequences upon Cy7 binding. Cy7 was able to spectroscopically discriminate between the right handed B-DNA of poly(dG-dC)(2) and its left handed Z-DNA counterpart induced by spermine or Co(III)hexamine via nearly opposite induced circular dichroic signal.