Abstract

In this article, we describe a novel method for the modification of nanocellulose (MNC) produced from coconut coir (a bio-waste) by acetylization applied to the removal of vanadium (V) and chromium (III) metal ions from an aqueous phase in a batch study. The structure of the MNC formed was confirmed using Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray (EDX), and atomic force microscopy (AFM) analysis. The adsorptive capacity of MNC was enhanced upon modification, achieving 93.6% removal for V V and 84.6% for Cr III at pH 5 within 30 min. The sorption data followed the Langmuir isotherm model (Q _max V V; 32.88 and Cr III; 114 mg g⁻¹) with the fast adsorption rate following the pseudo-first-order model (k ₁ V V; 0.06 and Cr III 0.073 min⁻¹, respectively). Thus, the MNC from coconut coir very much displayed the desired potential as a sorbent for the removal of these toxic pollutants from wastewater. The sorbent has a promising capability owing to its high sorption capacity which can be used at the industrial scale.

摘要

在本文中，我们描述了一种新的方法，该方法用于通过改性从椰子皮（生物废料）生产的纳米纤维素（MNC）进行乙酰化，以去除水中的钒（V）和铬（III）金属离子。批处理研究。使用傅立叶变换红外光谱（FTIR），能量色散X射线（EDX）和原子力显微镜（AFM）分析确认了形成的MNC的结构。修饰后增强了MNC的吸附能力，在30分钟内在pH 5时VV去除了93.6％，Cr III去除了84.6％。吸附数据遵循Langmuir等温模型（Q _max VV; 32.88和Cr III; 114 mg g ^-1），吸附速率遵循拟一阶模型（k ₁VV; 分别为0.06和Cr III 0.073 min ^-1）。因此，来自椰子椰壳的MNC非常有希望将其作为吸附剂从废水中去除这些有毒污染物的潜力。由于其高吸附能力，该吸附剂具有广阔的前景，可以在工业规模上使用。