An advanced oxidation-nanofiltration integrated hybrid process is developed in this study for treatment of leather industry wastewater to reusable criteria. The process uses a laboratory-synthesized graphene oxide-based nanocomposite in the final polishing step for ensuring high degree of purification. All investigations are done on live tannery wastewater having high level of recalcitrant pollutants such as chromium (8.2 mg L⁻¹), COD (10,500 mg L⁻¹), TDS (7420 mg L⁻¹), chloride (4620 mg L⁻¹) and sulfide (2560 mg L⁻¹). Performance of the developed membrane is also compared with commercially available counterpart. Detailed characterization (FTIR, SEM-EDX, and BET) and experimental evidences reveal high mechanical strength, hydrophilic nature and high selectivity in removal of ionic contaminants. The integrated process successfully removes chromium (99.5%), COD (>99%) and TDS (>96%) while retaining the essential ions (Ca²⁺, Mg²⁺) substantially. A sustained high flux hovering around 200 L/ (m² h) at 16 bar pressure over a reasonably long period (150 h) is an indicator of development of a potential new technology in effective treatment of leather industry wastewater.

本研究开发了一种先进的氧化-纳滤一体化混合工艺，用于将皮革工业废水处理至可重复使用的标准。该方法在最终抛光步骤中使用实验室合成的氧化石墨烯基纳米复合材料，以确保高度纯化。所有研究都是针对含高浓度难处理污染物的制革厂废水进行的，这些污染物包括铬（8.2 mg L ^-1），COD（10,500 mg L ^-1），TDS（7420 mg L ^-1），氯化物（4620 mg L ^-1））和硫化物（2560 mg L ^-1）。还将开发的膜的性能与市售的膜进行比较。详细的表征（FTIR，SEM-EDX和BET）和实验证据表明，在去除离子污染物方面具有很高的机械强度，亲水性和高选择性。集成工艺成功去除了铬（99.5％），COD（> 99％）和TDS（> 96％），同时基本上保留了必需离子（Ca 2 ⁺，Mg ²⁺）。在合理的长时间（150 h）内，在16 bar压力下持续高通量徘徊在200 L /（m ² h）左右，这表明已开发出有效处理皮革工业废水的潜在新技术。