利用白泥浸出液处理阴离子染料废水

以稀盐酸对碱性白泥进行酸浸,过滤得浸出液。研究白泥浸出液对水中阴离子染料活性嫩黄K-6G、酸性橙Ⅱ、直接黄R的去除效果。研究结果表明:白泥浸出液对活性嫩黄K-6G、酸性橙Ⅱ、直接黄R染料废水具有明显的脱色效果。在投加量为2g/L,pH值分别为12.50、12.00、12.00时,上述三种染料废水脱色率分别达93.5%、97.5%、99.8%,适宜的反应时间为90s。白泥浸出液碱性条件下产物对染料的吸附符合Freundlich吸附等温方程,吸附过程为自发放热反应。

Treatment of anionic dyes wastewater by a leaching solution of white mud

The alkaline white mud was dipped in dilute hydrochloric acid, and filtered to prepare the leaching solution. The removal effects of activated light yellow K-6G, acid orange II and direct yellow R from an aqueous solution using the leaching solution of white mud were studied. The results showed that the leaching solution of white mud was particularly effective in removing activated light yellow K-6G, acid orange II and direct yellow R. Particularly when the dosage was 2 g/L, the pH respectively was 12.5, 12.0 and 12.0, the maximum removal efficiencies reached up to 93. 5% , 97.5% and 99. 8% respectively. The appropriate reaction time was 90 s. It also indicated that the adsorption behavior of the anionic dyes on the hydroxide precipitates formed in alkaline solution by leaching solution in alkaline solution fitted well with the Freundlich isotherms. The adsorption process was exothermic in nature.