Sismanoglu Sedef, Buran Erdem
Department of Chemistry, Faculty of Science, Karabuk University, Karabuk, Turkey.
Sci Rep. 2025 Jan 22;15(1):2842. doi: 10.1038/s41598-024-83639-2.
Natural wastes and inorganic adsorbents are used for the removal of diazo dye Congo red (CR), which causes water pollution and is a carcinogen, from wastewater. Organic waste olive pulp (ZK), inorganic ZrO (Zr) and three different weight percent ZK/Zr (organic/inorganic) binary adsorbent systems prepared by ball-milling method were investigated for the effective removal of CR from wastewater. Characterization of both single and binary adsorbent systems were carried out by ATR/FTIR and SEM. According to the Langmuir isotherm, q values for ZK, Zr, 25ZK-75Zr, 50ZK-50Zr and 75ZK-25Zr at 45 °C were 588 mgg, 13 mgg, 46 mgg, 65 mgg and 84 mgg, respectively. According to Frumkin-Fowler-Guggenheim and Temkin isotherms, the adsorption heat was found to be exothermic for ZK and 75ZK-25Zr at all three temperatures, while it was found to be endothermic for Zr, 25ZK-75Zr and 50ZK-50Zr. It was observed that the ΔG° values calculated from the thermodynamic data were consistent with the values in the Flory-Huggings isotherm. According to the kinetic data, it was observed that all adsorbents except ZK obeyed the pseudo-first-order rate equation. It was shown by error calculations that the experimental data obeyed the Langmuir or Freundlich isotherms better. It was observed that a new and effective organic/inorganic adsorbent system could be obtained by adding ZK to ZrO for the removal of Congo red (CR) from water.
天然废物和无机吸附剂被用于从废水中去除重氮染料刚果红（CR），刚果红会造成水污染且是一种致癌物。研究了有机废物橄榄果肉（ZK）、无机ZrO（Zr）以及通过球磨法制备的三种不同重量百分比的ZK/Zr（有机/无机）二元吸附剂体系对废水中CR的有效去除效果。通过ATR/FTIR和SEM对单一及二元吸附剂体系进行了表征。根据朗缪尔等温线，在45℃时，ZK、Zr、25ZK - 75Zr、50ZK - 50Zr和75ZK - 25Zr的q值分别为588 mg/g、13 mg/g、46 mg/g、65 mg/g和84 mg/g。根据弗鲁姆金 - 福勒 - 古根海姆等温线和坦金等温线，发现在所有三个温度下，ZK和75ZK - 25Zr的吸附热为放热，而Zr、25ZK - 75Zr和50ZK - 50Zr的吸附热为吸热。观察到根据热力学数据计算出的ΔG°值与弗洛里 - 哈金斯等温线中的值一致。根据动力学数据，观察到除ZK外的所有吸附剂均符合准一级速率方程。通过误差计算表明，实验数据更好地符合朗缪尔或弗伦德利希等温线。观察到通过向ZrO中添加ZK可以获得一种新型且有效的有机/无机吸附剂体系，用于从水中去除刚果红（CR）。
