Aspergillus ficuum was immobilized with sodium alginate, and decolourization of Reactive Brilliant Blue KN-R was studied on immobilized and free Aspergillus ficuum. The optimal preparation condition of the strain immo...Aspergillus ficuum was immobilized with sodium alginate, and decolourization of Reactive Brilliant Blue KN-R was studied on immobilized and free Aspergillus ficuum. The optimal preparation condition of the strain immobilization was obtained by the orthogonal test, it is sodium alginate 3%, CaCl_2 5%, wet mycelia 30 g/L, calcific time 8 h. It was found that the immobilized cells could effectively decolourize Reactive Brilliant Blue KN-R, the optimum temperature and pH were 33℃ and 5.0, respectively. The kinetics study of decolourization of immobilized cells showed that the decolourization of Aspergillus ficuum immobilized conformed to zero-order reaction model. The decolourization efficiency of immobilized cell compared with that of free cell in different physical conditions. Results showed that the decolourization of immobilized cells with mycelia had the best efficiency. The immobilized cells could be reused after the first decolourization.展开更多
Photocatalyst was prepared by immobilizing TiO2 on glass beads using the traditional sol-gel method. Ultraviolet light （UV） produced by pulsed streamer discharge was then used to induce photocatalytic activity of Ti...Photocatalyst was prepared by immobilizing TiO2 on glass beads using the traditional sol-gel method. Ultraviolet light （UV） produced by pulsed streamer discharge was then used to induce photocatalytic activity of TiO2 photocatalyst. Decolouration efficiency of the representative azo dye （acid orange 7, AOT） was investigated using the synergistic system of pulsed streamer discharge plasma and TiO2 photocatalysis. The obtained results showed that the decolouration rate of AO7 could be increased by 16.7% under the condition of adding supported TiO2 in the pulsed streamer discharge system, compared to that in the sole pulsed streamer discharge plasma system, due to the synergistic effect of pulsed streamer discharge and TiO2 photocatalysis induced by pulsed streamer discharge. The synergistic system of pulsed streamer discharge and TiO2 photocatalyst was found to have more reactive radicals for degradation of organic compounds in water.展开更多
This paper explores a new compounding coagulant for decolourization, which can decolour wastewater containing soluble dyestuffs (especially reactive and acidic dyestuffs). The best prescription and condition of this d...This paper explores a new compounding coagulant for decolourization, which can decolour wastewater containing soluble dyestuffs (especially reactive and acidic dyestuffs). The best prescription and condition of this decolourizing process are discussed and the mechanism is studied. Experimental results show that the treatment efficiency of decolourization is very high by using the new coagulant. Both the colour and pH of the effluent meet the required standards. The synergism of chemical and physico-chemical actions among the coagulant components has also been found. This effect determines the superiority of the new coagulant to other single component ones.展开更多
In co-colouration systems of rare earth(Ⅲ) with a metal(Ⅱ), induced colouration and decolouration ef- fects between different rare earths have been discovered. A sensitive co-colouration system of 《Lead(Ⅱ)-Rare Ea...In co-colouration systems of rare earth(Ⅲ) with a metal(Ⅱ), induced colouration and decolouration ef- fects between different rare earths have been discovered. A sensitive co-colouration system of 《Lead(Ⅱ)-Rare Earth(Ⅲ)-Alizarin Violet-Sensitizer》 was chosen as a typical one to study; and neodymium, gadolinium and yttrium were used to represent light, middle and heavy rare earths respectively. Semiquantitative relationships for the induced effects between yttrium and neodymium as well as between gadolinium and neodymium have been determined and discussed. In the presence of a sensitizer, these metal ions cannot always be coloured by alizarin violet when each of them is present alone, but a very sensitive co-colouration or co-decolouration may occur during their coexistence under certain conditions. If these metals exist as foreign ions in the photometric determination of another metal, serious unperceivable interference will possibly occur. Moreover, the condi- tions leading to induced co-colouration and co-decolouration are very complicated, so that close attention must be paid to this area in the photometric determination of certain metals.展开更多
<div style="text-align:justify;"> Ozone plasma treatment is accessible to be applied on shading adjustment and colour fading because of the capacity of ozone production. It is a green process that trea...<div style="text-align:justify;"> Ozone plasma treatment is accessible to be applied on shading adjustment and colour fading because of the capacity of ozone production. It is a green process that treats dyed cotton fabric under dry condition so as to avoid chemical pollutants. This study means to explore colour reflectance of decolourized sulfur dyed cotton texture using ozone plasma treatment. Sulfur dyed cotton textures with various colour depths (0.5%, 1.5%, 2.5%) were set up to be treated different plasma parameters, including ozone air concentrations (10%, 30%, 50%, 70%), water contents in terms of weight percentage (35%, 45%) of fabric and ozone air plasma treatment periods (10 mins, 20 mins, 30 mins). The colour fading result is assessed by the colour reflectance in percentage (R%) utilizing spectrophotometer under CIE standard illuminant D65. The valid colour fading based on high percentage of reflectance was demonstrated from plasma treatment under higher ozone air concentration (50% and 70% ozone in air) and longer time length of plasma treatment (20 mins and 30 mins). The level of water content contained in the cotton fabrics is appeared to have noteworthy relationship with the degree of decolourization. </div>展开更多
Several wood rotting fungi decolourized Remazol brilliant blue R (RBBR) and carminic acid (CA). Parallel activity of laccase in these fungi was studied. The addition of acetovanillone (AV) or acetosyringone (AS) inten...Several wood rotting fungi decolourized Remazol brilliant blue R (RBBR) and carminic acid (CA). Parallel activity of laccase in these fungi was studied. The addition of acetovanillone (AV) or acetosyringone (AS) intensified these processes: decolourization was more extensive than in the experiment omitting these compounds. At the presence of AS the decourization was more extensive than AV. However the level of decolorizing was relatively low in comparison to laccase activity on syringaldazine. The highly purified constitutive form of Cerrena unicolor and inducible form of Trametes versicolor laccases also destained both dyes. Anyway the addition of AV and AS improved the efficiency of dyes decolourization by wood rotting fungi and fungal laccase. Nitrogen starvation induced the laccase and decoloration activity in both organisms, irrespective of nitrogen availability. This fact indicates laccase not solely responsible for discoloration, and probably discoloration of dyes involves more than one mechanism.展开更多
文摘Aspergillus ficuum was immobilized with sodium alginate, and decolourization of Reactive Brilliant Blue KN-R was studied on immobilized and free Aspergillus ficuum. The optimal preparation condition of the strain immobilization was obtained by the orthogonal test, it is sodium alginate 3%, CaCl_2 5%, wet mycelia 30 g/L, calcific time 8 h. It was found that the immobilized cells could effectively decolourize Reactive Brilliant Blue KN-R, the optimum temperature and pH were 33℃ and 5.0, respectively. The kinetics study of decolourization of immobilized cells showed that the decolourization of Aspergillus ficuum immobilized conformed to zero-order reaction model. The decolourization efficiency of immobilized cell compared with that of free cell in different physical conditions. Results showed that the decolourization of immobilized cells with mycelia had the best efficiency. The immobilized cells could be reused after the first decolourization.
基金supported by the National Natural Science Foundation Committee of China(No.20377006)Foundation of Education Ministry of China(No.2005141002)
文摘Photocatalyst was prepared by immobilizing TiO2 on glass beads using the traditional sol-gel method. Ultraviolet light （UV） produced by pulsed streamer discharge was then used to induce photocatalytic activity of TiO2 photocatalyst. Decolouration efficiency of the representative azo dye （acid orange 7, AOT） was investigated using the synergistic system of pulsed streamer discharge plasma and TiO2 photocatalysis. The obtained results showed that the decolouration rate of AO7 could be increased by 16.7% under the condition of adding supported TiO2 in the pulsed streamer discharge system, compared to that in the sole pulsed streamer discharge plasma system, due to the synergistic effect of pulsed streamer discharge and TiO2 photocatalysis induced by pulsed streamer discharge. The synergistic system of pulsed streamer discharge and TiO2 photocatalyst was found to have more reactive radicals for degradation of organic compounds in water.
文摘This paper explores a new compounding coagulant for decolourization, which can decolour wastewater containing soluble dyestuffs (especially reactive and acidic dyestuffs). The best prescription and condition of this decolourizing process are discussed and the mechanism is studied. Experimental results show that the treatment efficiency of decolourization is very high by using the new coagulant. Both the colour and pH of the effluent meet the required standards. The synergism of chemical and physico-chemical actions among the coagulant components has also been found. This effect determines the superiority of the new coagulant to other single component ones.
文摘In co-colouration systems of rare earth(Ⅲ) with a metal(Ⅱ), induced colouration and decolouration ef- fects between different rare earths have been discovered. A sensitive co-colouration system of 《Lead(Ⅱ)-Rare Earth(Ⅲ)-Alizarin Violet-Sensitizer》 was chosen as a typical one to study; and neodymium, gadolinium and yttrium were used to represent light, middle and heavy rare earths respectively. Semiquantitative relationships for the induced effects between yttrium and neodymium as well as between gadolinium and neodymium have been determined and discussed. In the presence of a sensitizer, these metal ions cannot always be coloured by alizarin violet when each of them is present alone, but a very sensitive co-colouration or co-decolouration may occur during their coexistence under certain conditions. If these metals exist as foreign ions in the photometric determination of another metal, serious unperceivable interference will possibly occur. Moreover, the condi- tions leading to induced co-colouration and co-decolouration are very complicated, so that close attention must be paid to this area in the photometric determination of certain metals.
文摘<div style="text-align:justify;"> Ozone plasma treatment is accessible to be applied on shading adjustment and colour fading because of the capacity of ozone production. It is a green process that treats dyed cotton fabric under dry condition so as to avoid chemical pollutants. This study means to explore colour reflectance of decolourized sulfur dyed cotton texture using ozone plasma treatment. Sulfur dyed cotton textures with various colour depths (0.5%, 1.5%, 2.5%) were set up to be treated different plasma parameters, including ozone air concentrations (10%, 30%, 50%, 70%), water contents in terms of weight percentage (35%, 45%) of fabric and ozone air plasma treatment periods (10 mins, 20 mins, 30 mins). The colour fading result is assessed by the colour reflectance in percentage (R%) utilizing spectrophotometer under CIE standard illuminant D65. The valid colour fading based on high percentage of reflectance was demonstrated from plasma treatment under higher ozone air concentration (50% and 70% ozone in air) and longer time length of plasma treatment (20 mins and 30 mins). The level of water content contained in the cotton fabrics is appeared to have noteworthy relationship with the degree of decolourization. </div>
文摘Several wood rotting fungi decolourized Remazol brilliant blue R (RBBR) and carminic acid (CA). Parallel activity of laccase in these fungi was studied. The addition of acetovanillone (AV) or acetosyringone (AS) intensified these processes: decolourization was more extensive than in the experiment omitting these compounds. At the presence of AS the decourization was more extensive than AV. However the level of decolorizing was relatively low in comparison to laccase activity on syringaldazine. The highly purified constitutive form of Cerrena unicolor and inducible form of Trametes versicolor laccases also destained both dyes. Anyway the addition of AV and AS improved the efficiency of dyes decolourization by wood rotting fungi and fungal laccase. Nitrogen starvation induced the laccase and decoloration activity in both organisms, irrespective of nitrogen availability. This fact indicates laccase not solely responsible for discoloration, and probably discoloration of dyes involves more than one mechanism.
