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Experimental data on adsorption of Cr(VI) from aqueous solution using nanosized cellulose fibers obtained from rice husk

机译:稻壳制纳米纤维素纤维从水溶液中吸附六价铬的实验数据

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摘要

The aim of this study was to evaluate the efficiency of nano-sized cellulose obtained from rice husk for Cr(VI) adsorption. The effect of operational parameters including initial pH (3–10), contact time (0–120 min), adsorbent dosage (0.2–1.5 g/L), and initial Cr(VI) concentration (5–50 mg/L) were investigated according to one factor at time method. The results showed, in pH=6, contact time=100 min, adsorbent dose=1.5 g/L and 30 mg/L initial chromium concentration, the adsorption efficiency reached to 92.99%. Also Langmuir isotherm with (R2=0.998 at 303 °K) and pseudo-first-order kinetic model (R2=0.993) were the best models for describing the Cr(VI) adsorption reactions. The negative values of ΔG ∘  and positive value of ΔH ∘  showed that, the Cr(VI) adsorption on NCFs was endothermic and spontaneously process. Therefore, it can be concluded that the application this method is recommended for removing Cr(VI) from aqueous solutions.
机译:这项研究的目的是评估从稻壳获得的纳米纤维素对Cr(VI)吸附的效率。操作参数的影响包括初始pH(3-10),接触时间(0-120分钟),吸附剂剂量(0.2-1.5 g / L)和初始Cr(VI)浓度(5-50 mg / L)在时间方法中根据一个因素进行了调查。结果表明,在pH = 6,接触时间= 100 min,吸附剂剂量= 1.5 g / L和初始铬浓度30 mg / L的条件下,吸附效率达到92.99%。另外,在303°K下Langmuir等温线(R 2 = 0.998)和伪一阶动力学模型(R 2 = 0.993)是描述Cr的最佳模型。 (六)吸附反应。 ΔG∘的负值和ΔH∘的正值表明,NCFs上Cr(VI)的吸附是吸热的,并且是自发过程。因此,可以得出结论,建议将该方法用于从水溶液中去除Cr(VI)的应用。

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