染料是纺织工业废水中存在的重要污染物之一。这些化合物通常是有毒的,致癌,和对生物体的诱变,化学和光化学稳定,和不可生物降解的。酸性红18是目前在纺织工业中使用的偶氮染料之一。光催化降解作为高级氧化过程提供了巨大的潜力,在这项研究中,在可见光照射下评估了使用BiOI/ZnO纳米复合材料对酸性红18的光催化降解。研究了pH值和BiOI/ZnO用量等最重要参数对最佳条件的影响。在最佳实验条件为pH为7,BiOI/ZnO用量为1.5g/L时,染料去除率为85.1%。数据与伪一级动力学模型有很好的一致性。因此,BiOI/ZnO/UV是一种高效的染料降解工艺。
Dyes are one of the most important existing pollutants in textile industrial wastewater. These compounds are often toxic, carcinogenic, and mutagenic to living organisms, chemically and photochemically stable, and non-biodegradable. Acid red 18 is one of the azo dyes that are currently used in the textile industries. Photocatalytic degradation offers a great potential as an advanced oxidation process, in this study photocatalytic degradation of Acid red 18 by using BiOI/ZnO nanocomposite was evaluated under visible light irradiation. The influence of most essential parameters such as pH and BiOI/ZnO dosage were studied for optimum conditions. The dye removal efficiency was 85.1% at optimum experimental conditions of pH of 7, and BiOI/ZnO dosage of 1.5 g/L. The data had a good agreement with pseudo first-order kinetic model. Thus, the BiOI/ZnO/UV is an efficient process for dye degradation.