In this study, colour and chemical oxygen demand (COD) removal from the textile wastewater by heterogeneous Fenton process have been investigated. Primarily, the Fe(III)/SnO2 catalyst is prepared by co-precipitation method and characterized by BET analyses. The BET analysis results show that the pore size of the Fe(III)/SnO2 catalyst is 2.013 nm and it is classified as a mesoporous catalyst. Then the prepared catalyst is used in the heterogeneous Fenton tests. The effects of the amount of the catalyst, pH of the solution, hydrogen peroxide (H2O2) concentration, temperature and reaction time on the color and COD removals have been studied and the optimum conditions are determined. In the optimum experimental conditions (2.0 g/L of 8 wt.% Fe/SnO2, pH 2, hydrogen peroxide concentration 300 mg/L, temperature 35C and reaction time 90 min), 91% colour and 86% COD removal efficiencies are obtained. The COD removal kinetics of textile wastewater is also investigated. It is determined that the removal of COD obeyed the second-order kinetics. Finally, stability and reuse of the catalyst are tested. This catalyst can be successfully used repeatedly and suitable for textile wastewater treatment

中文翻译：

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Fe(III)基催化剂多相Fenton工艺处理纺织工业废水

在这项研究中，研究了通过非均相 Fenton 工艺从纺织废水中去除颜色和化学需氧量 (COD)。首先，Fe(III)/SnO2 催化剂通过共沉淀法制备并通过 BET 分析表征。BET分析结果表明，Fe(III)/SnO2催化剂的孔径为2.013 nm，属于介孔催化剂。然后将制备的催化剂用于非均相芬顿测试。研究了催化剂用量、溶液 pH 值、过氧化氢 (H2O2) 浓度、温度和反应时间对颜色和 COD 去除率的影响，并确定了最佳条件。在最佳实验条件下（2.0 g/L 的 8 wt.% Fe/SnO2，pH 2，过氧化氢浓度 300 mg/L，温度 35C 和反应时间 90 min），获得 91% 的颜色和 86% 的 COD 去除效率。还研究了纺织废水的 COD 去除动力学。确定COD的去除服从二级动力学。最后，测试了催化剂的稳定性和再利用性。该催化剂可成功重复使用，适用于纺织废水处理