ABSTRACT

In the reported study, nano silica and nano clay were used to remove the residual color from effluent generated during the dyeing of wool fabric with basic violet. Various concentrations (0.1%, 0.25%, 0.5%, and 1.0%) of the nanoparticles were treated with dye effluent for different durations and the results are compared with the color removal of commercial activated carbon. The nanoparticles were characterized for their physical properties including particle size, FTIR, and TEM. Freundlich isotherm was used for the dye adsorption studies. The FTIR and TEM analysis depicted the characteristic peaks and crystal geometry for the selected nanoparticles. The treated effluent showed a significant reduction in color, biological, and chemical oxygen demand (more than 99%). The treatment was optimized for 1.0% adsorbent concentration for 60 minutes. The color removal efficiency of nano silica was found to be higher at low concentration; however, the efficiency of nano clay exceeded at a higher concentration of adsorbents.

摘要

在报道的研究中，纳米二氧化硅和纳米粘土被用于去除羊毛织物在碱性紫染色过程中产生的废水中的残留颜色。用染料流出物处理不同浓度（0.1%、0.25%、0.5% 和 1.0%）的纳米颗粒不同的持续时间，并将结果与​​商业活性炭的颜色去除进行比较。纳米粒子的物理性质包括粒径、FTIR和TEM。Freundlich 等温线用于染料吸附研究。FTIR 和 TEM 分析描绘了所选纳米粒子的特征峰和晶体几何形状。处理后的流出物颜色、生物和化学需氧量显着降低（超过 99%）。该处理针对 1.0% 的吸附剂浓度进行了 60 分钟的优化。纳米二氧化硅的脱色效率在低浓度下较高；然而，在较高浓度的吸附剂下，纳米粘土的效率超过了。