|
Combined with the template and sol -gel method to Ti (OBu) 4 as precursors , respectively, leaves and paper as a template to prepare a special nano titanium dioxide. With leaves as a template , the prepared vein structure is similar to the leaf mesh titania ; the prepared filter paper as a template is similar to the filter structure of the \In addition, the paper-like titanium oxide , based on the in situ static polypyrrole composite was prepared of PPY / TP composite material morphology is similar paper structure , by controlling the polymerization time can effectively control the polypyrrole -coated volume . To facilitate recovery of the catalyst , and a filter paper as a template as a strontium ferrite magnetic core , magnetic successfully prepared titania paper , its morphology is similar to the morphology filter . To design a corresponding catalytic cracking unit , and apply it to the wastewater treatment explosives . Above, the literature reported less related technology can be extended to other areas, especially in the field of catalysis . This topic uses a variety of treatment methods and used to deal with toxic at high concentrations , refractory DNT wastewater . DNT wastewater first acid precipitation, the optimal pH of 1.2, COD removal rate of 50% ; then zero- valent iron , pH selected in the range of 1-2 , and is under the protection of nitrogen ; zero valence iron reduction is not effective in a significant reduction in COD, but you can put NO 2 - restore NH 2 - and greatly reduce the toxicity of nitro compounds , and can activate the benzene ring , because NH 2 - is a reactive group ; ferrous ion was introduced advanced oxidation reaction Fe 2 / H 2 O 2 / TiO 2 / UV necessary to optimize the parameters of pH 2.5 , respectively , H 2 O 2 / Fe 2 ratio of 4:1 , the reaction time was 2 h, hydrogen peroxide is a batch repeatedly feeding methods ; final pH adjusted to 10 flocculation 30min, to obtain a colorless transparent liquid , to the biodegradability criteria.
|