Abstract Untreated coking effluent presents a great challenge for sustainable development of the steel industry and environment preservation. In this study, an internal micro-electrolysis method using Fe/C materials was employed for pretreatment of real coking wastewater with high mass concentration. The Fe/C materials were prepared by Fe powder and graphite powder; and the characteristics of surface morphology, structure, composition of the synthesized materials were examined by Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Energy Dispersive X-ray Spectroscopy (EDS). The effects of factors namely dosage of Fe/C material, treatment time, initial pH and temperature were investigated via chemical oxygen demand (COD) and phenol removal efficiencies. Optimal treatment efficiency was attained at pH of 4, Fe/C dosage of 40 g/L, treatment time of 360 minutes and temperature of 25°C. After the internal electrolysis process, the values of COD, BOD5, and phenol of the wastewater were 6500, 4850 and 0.1 mg/L, respectively.

中文翻译：

---

Fe/C材料内微电解预处理浓缩焦化废水

摘要 未经处理的焦化废水对钢铁工业的可持续发展和环境保护提出了巨大挑战。本研究采用Fe/C材料的内部微电解法对高质量浓度的实际焦化废水进行预处理。Fe/C材料由Fe粉和石墨粉制备；并通过扫描电子显微镜(SEM)、X射线衍射(XRD)和能量色散X射线光谱(EDS)对合成材料的表面形貌、结构、组成等特征进行了研究。通过化学需氧量 (COD) 和苯酚去除效率研究了 Fe/C 材料用量、处理时间、初始 pH 值和温度等因素的影响。在 pH 值为 4 时达到最佳处理效率，Fe/C用量40 g/L，处理时间360分钟，温度25℃。内电解处理后废水的COD、BOD5和苯酚值分别为6500、4850和0.1 mg/L。