Amity Institute of Biotechnology, Amity University Noida, Sector 125, Uttar Pradesh, India.
Environ Technol. 2010 Jun;31(7):755-60. doi: 10.1080/09593331003621565.
A novel composite has been prepared from nanomaterials and powdered orange peel. The composite is adhered to a plastic strip and may be employed for the removal of synthetic dyes from aqueous solutions, for example from dyehouse effluents. Using Methylene Blue (CI Basic Blue 9) as the reference dye, the characteristics of the adsorbent have been studied. The effect of pH, type of nanomaterial (e.g. carbon nanotubes, activated carbon nanotubes, or titanium dioxide nanoparticles), contact time, and reusability have each been investigated. The results show that the adsorption capacity of suspended orange peel powder, an orange peel strip, and an activated carbon nanotube/orange peel strip were 46%, 67% and 78%, respectively. The uptake of dye was greatly affected by the pH of the solution, maximum absorption being obtained at pH 10, and none at all at pH 2. The improved performance was probably the result of the increased area available for adsorption compared with orange peel powder alone. The system was found to be reusable for up to six cycles without appreciable loss of adsorption and desorption efficiency. The nanomaterial in the composite enhanced performance, not only by increasing adsorption efficiency but also by inhibiting biodegradation of the orange peel powder, thereby increasing the life of the strips. The system offers an economical, user-friendly, efficient and reusable adsorption treatment for the removal of dyes from wastewater.
一种新型复合材料由纳米材料和粉状橙皮制成。该复合材料附着在塑料条上，可用于从水溶液中去除合成染料，例如从染坊废水中去除。以亚甲蓝（CI 碱性蓝 9）作为参考染料，研究了吸附剂的特性。考察了 pH 值、纳米材料类型（如碳纳米管、活性碳纳米管或二氧化钛纳米颗粒）、接触时间和可重复使用性的影响。结果表明，悬浮橙皮粉、橙皮条和活性碳纳米管/橙皮条的吸附容量分别为 46%、67%和 78%。染料的吸收受溶液 pH 值的影响很大，在 pH 值为 10 时吸收最大，在 pH 值为 2 时完全没有吸收。性能的提高可能是由于与单独的橙皮粉相比，可用于吸附的表面积增加。该系统可重复使用六次以上，吸附和解吸效率没有明显损失。复合材料中的纳米材料不仅通过提高吸附效率，而且通过抑制橙皮粉的生物降解，从而延长了条带的使用寿命，从而提高了性能。该系统为从废水中去除染料提供了一种经济、用户友好、高效和可重复使用的吸附处理方法。
