CAJ | 학술논문

研究了高铁酸盐溶液(FS)降解直接耐晒黑G(DB19)的效果,并采用UV-Vis、GC/MS等方法对降解机理进行了分析.结果表明,FS对DB19的脱色效果较好,pH<7.7时,5min的脱色率达到94%以上,最佳范围为pH<10.7.FS的最佳投加量为20mg/L,反应60min时,对DB19色度和COD的去除率分别为95%和60%.FS对DB19废水TOC的去除率为5%,表明染料大分子难以被完全矿化.UV-Vis扫描、GC/MS分析和体系pH值的变化结果表明,染料分子的偶氮键能被迅速攻击破坏,使染料消色,染料大分子被氧化为有机小分子中间产物,提高了染料废水的可生化性,同时产生大量的酸性有机中间物质,导致体系的pH值显著降低.
연구료고철산염용액(FS)강해직접내쇄흑G(DB19)적효과,병채용UV-Vis、GC/MS등방법대강해궤리진행료분석.결과표명,FS대DB19적탈색효과교호,pH<7.7시,5min적탈색솔체도94%이상,최가범위위pH<10.7.FS적최가투가량위20mg/L,반응60min시,대DB19색도화COD적거제솔분별위95%화60%.FS대DB19폐수TOC적거제솔위5%,표명염료대분자난이피완전광화.UV-Vis소묘、GC/MS분석화체계pH치적변화결과표명,염료분자적우담건능피신속공격파배,사염료소색,염료대분자피양화위유궤소분자중간산물,제고료염료폐수적가생화성,동시산생대량적산성유궤중간물질,도치체계적pH치현저강저.
The degradation of direct fast black G (DB19) with ferrate solution (FS) was studied, and the mechanism was analyzed by UV-Vis and GC/MS methods. The decolorization ratio was above 94% after 5min in the presence of FS at pH<7.7, and the optimal range of pH was lower than 10.7. The decolorization ratio and COD removal ratio were 95% and 60% after 60min, respectively, in the case of FS which dosage was 20mg/L. TOC removal ratio of DB19 was only 5% when ferrate was supplied to reaction system, which indicated that it was difficult for FS to mineralize dye macromolecule. The results of UV-Vis, GC/MS and pH change showed that the azo bonds of dye molecule were attracted and cleaved, causing decolorization of DB19. The dye macromolecule could be oxidized to small molecule, which increased the biodegradability of the dye wastewater. Furthermore, a large number of acidic organic intermediates were detected, which obviously caused the decrease of pH.