Alprol Ahmed E, Bakr Ahmed, Al-Saeedi Sameerah I, Mansour Abdallah Tageldein, El-Haroun Ehab, Alharthi Maymounah N, Ashour Mohamed
National Institute of Oceanography and Fisheries (NIOF), Cairo, 11516, Egypt.
Environment and Bio-agriculture Department, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.
Sci Rep. 2025 Jul 2;15(1):23289. doi: 10.1038/s41598-025-04207-w.
The current work presents a novel and sustainable approach that uses the synthesized Chitosan/Ferrous Oxide Nanocomposite (CFON) to remove the organic azo dye, Acid Red 73 (AR73), a hazardous pollutant commonly found in industrial wastewater, from aqueous solutions and aquaculture effluents wastewater. The CFON exhibited excellent photocatalytic degradation performance under sunlight irradiation. Batch adsorption experiments were conducted to investigate the influence of various parameters on the removal efficiency of the dye, including pH, contact time, adsorbent dosage, initial concentration, and temperature. The results showed that the nanocomposite effectively achieved a maximum removal percentage of 99.3% under optimal conditions (pH 5 for 180 min at 80 and 100 mg with 75 mg L and 30 °C). Kinetic studies revealed that the adsorption process followed a pseudo-second-order model, indicating that chemisorption is the dominant mechanism. The impact of different light sources on dye removal efficiency was evaluated, confirming the superior performance of sunlight-driven photocatalysis. The application of CFON to improve water quality in aquaculture was investigated and showed effectively reduced conductivity, total dissolved solids, turbidity, and nitrate levels, demonstrating its potential for sustainable water management. This work highlights the promising potential of CFON as an environmentally friendly and efficient material to remove AR73 and improve aquaculture wastewater quality.
当前的工作提出了一种新颖且可持续的方法，即使用合成的壳聚糖/氧化亚铁纳米复合材料（CFON）从水溶液和水产养殖废水排放物中去除有机偶氮染料酸性红73（AR73），这是一种在工业废水中常见的有害污染物。CFON在阳光照射下表现出优异的光催化降解性能。进行了批量吸附实验，以研究各种参数对染料去除效率的影响，包括pH值、接触时间、吸附剂用量、初始浓度和温度。结果表明，该纳米复合材料在最佳条件下（pH值为5，在80和100毫克、75毫克/升以及30℃下接触180分钟）有效地实现了99.3%的最大去除率。动力学研究表明，吸附过程遵循准二级模型，表明化学吸附是主要机制。评估了不同光源对染料去除效率的影响，证实了阳光驱动光催化的优越性能。研究了CFON在改善水产养殖水质方面的应用，结果表明其有效降低了电导率、总溶解固体、浊度和硝酸盐水平，证明了其在可持续水管理方面的潜力。这项工作突出了CFON作为一种环保且高效的材料去除AR73和改善水产养殖废水质量的广阔前景。
