Aquatic Environment and Health Management Division, ICAR-Central Institute of Fisheries Education, Mumbai, India.
College of Fisheries, CAU (I), Agartala, India.
Water Environ Res. 2021 Oct;93(10):2223-2236. doi: 10.1002/wer.1595. Epub 2021 Jun 22.
Textile dye effluents have many deleterious effects; therefore, it is essential to remove before releasing into waterbodies. This study developed a two-step process for decolorization of textile dye using sugarcane bagasse (SCB). The first step of the process involved functionalization of SCB with alginic acid and applying as packing material in column and assessing its performance for adsorptive removal of Drimarene red. The designed column showed 90% removal of the dye in dye-aqueous solution whereas 80% removal in dye-house wastewater. Adsorption capacity was increased at first 10 min and then gradually decreased with time. Breakthrough point was not achieved during the 60 min of experiment. Three non-equilibrium models were applied to understand the column bed properties. In the second step, the adsorbed dye molecules in SCB were degraded using an edible fungus Pleurotus sp. to obtain a dye-free nitrogen-rich bagasse. The fungus-treated SCB showed no residual toxicity and a considerable improvement in nitrogen content (from 0.14% to 0.62%) was noticed after the study of elemental profile. New design of the column bed, the processes of the chemical functionalization of the SCB, and bioremediation of dye treated bagasse through Pleurotus sp. offer a novel solution for efficient and safe disposal of textile dyes. PRACTITIONER POINTS: Two-step process for remediation of a textile dye using an agrowaste and Pleurotus sp. Chemical functionalization of an agrowaste for enhanced dye removal. New process of adsorption-fungal degradation for safe disposal of the dyes. Novel technology for a sustainable use of the agrowaste for environmental safety.
纺织染料废水有许多有害影响；因此，在排放到水体之前去除这些染料至关重要。本研究开发了一种两步法工艺，使用甘蔗渣（SCB）对纺织染料进行脱色。该工艺的第一步涉及用海藻酸对 SCB 进行功能化，并将其用作填充材料在柱中进行应用，评估其对直接红 31 的吸附去除性能。设计的柱子在染料水溶液中显示出 90%的染料去除率，而在染料厂废水中则达到 80%的去除率。吸附容量在最初的 10 分钟内增加，然后随着时间的推移逐渐减少。在 60 分钟的实验过程中，未达到穿透点。应用了三种非平衡模型来理解柱床的特性。在第二步中，使用食用真菌蘑菇（Pleurotus sp.）将吸附在 SCB 中的染料分子降解，得到无染料的富氮甘蔗渣。真菌处理后的 SCB 没有残留毒性，并且在元素分析后发现氮含量有了显著提高（从 0.14%提高到 0.62%）。柱床的新设计、SCB 的化学功能化过程以及通过蘑菇（Pleurotus sp.）对处理过的染料进行生物修复，为高效、安全地处理纺织染料提供了一种新的解决方案。
