The Removal of Ruthenium-Based Complexes N3 Dye from DSSC Wastewater Using Copper Impregnated KOH-Activated Bamboo Charcoal,Water, Air, & Soil Pollution

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The Removal of Ruthenium-Based Complexes N3 Dye from DSSC Wastewater Using Copper Impregnated KOH-Activated Bamboo Charcoal
Water, Air, & Soil Pollution ( IF 3.8 ) Pub Date : 2021-09-12 , DOI: 10.1007/s11270-021-05333-7
Abu Masanizan ₁ , Chee Ming Lim ₁ , Muhammad Raziq Rahimi Kooh ₁ , Abdul Hanif Mahadi ₁ , Roshan Thotagamuge ₁

Affiliation

In this study, Cu-modified activated bamboo charcoal is studied for its performance in removing simulated ruthenium dye wastes. The bamboo belonging to the genus Gigantochloa was used as the starting material to prepare the bamboo charcoal (BC). The BC is activated using KOH, NaOH, and HCl. The activated BCs were then further modified using CuCl₂^. H₂O solution to obtain Cu-impregnated BC. The elemental, functional groups, and surface morphology analyses were carried out to characterize the adsorbents. The Ru complex dye adsorption process was evaluated by batch adsorption experiments, and out of all the adsorbents, the copper-modified KOH-activated bamboo charcoal (10BCKOH) showed the highest adsorption capability. Then, the 10BCKOH characterize with BET, SEM, EXD, XRD, and FTIR before and after the adsorption and optimize the adsorption parameters of pH, dosage, contact time, and initial concentration. The adsorption of the Ru dye is strongly dependent on the pH of the dye solution. The adsorption isotherm has a strong correlation with the Freundlich model, with the value of R² at 0.927 (K_F = 0.0235). The maximum adsorption capacity predicted by the Langmuir model was 64.4 mg.g⁻¹ for 10BCKOH sample. The adsorption process fitted well to the pseudo-second-order kinetic model (R² = 0.996). The kinetic and isotherm parameters showed that the adsorption of Ru complex onto 10BCKOH was feasible and spontaneous under the reported experimental conditions, and the ion exchange mechanism played a significant role in the process. Our results have shown that 10BCKOH is effective for the removal of Ru dye from the aqueous solution.

Graphical abstract

中文翻译：

铜浸KOH活化竹炭去除DSSC废水中钌基络合物N3染料

在这项研究中，研究了铜改性竹炭去除模拟钌染料废物的性能。属于Gigantochloa属的竹子被用作制备竹炭(BC)的起始材料。BC 使用 KOH、NaOH 和 HCl 活化。然后使用CuCl ₂进一步修饰活化的BC ^。H ₂O 溶液以获得浸渍铜的 BC。进行元素、官能团和表面形态分析以表征吸附剂。Ru复合染料吸附过程通过批量吸附实验进行评估，在所有吸附剂中，铜改性KOH活性炭（10BCKOH）表现出最高的吸附能力。然后，10BCKOH在吸附前后分别用BET、SEM、EXD、XRD和FTIR表征，并优化了pH、用量、接触时间和初始浓度等吸附参数。Ru染料的吸附强烈依赖于染料溶液的pH值。吸附等温线与 Freundlich 模型有很强的相关性，R ^{2 的}值为 0.927 ( K _F = 0.0235）。对于 10BCKOH 样品，Langmuir 模型预测的最大吸附容量为 64.4 mg.g ^-1。吸附过程非常符合准二级动力学模型（R ² = 0.996）。动力学和等温线参数表明，在报道的实验条件下，Ru 络合物在 10BCKOH 上的吸附是可行且自发的，离子交换机制在该过程中发挥了重要作用。我们的结果表明，10BCKOH 可有效去除水溶液中的 Ru 染料。

图形概要

更新日期：2021-09-13

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