Department of Chemistry, International Hellenic University, Kavala, Greece.
Hephaestus Advanced Laboratory, International Hellenic University, Kavala, Greece.
Waste Manag Res. 2023 Jan;41(1):155-163. doi: 10.1177/0734242X221105414. Epub 2022 Jul 18.
In this work, we studied the application of photovoltaic solar energy for driving the electrochemical processes of electrocoagulation and electrooxidation to remediate drilling fluid wastewater, and simultaneously harvest energy in the form of electrolytic hydrogen gas produced at the cathode. The electrocoagulation was performed with sacrificial aluminium electrodes and electrooxidation with dimensionally stable boron-doped diamond electrodes in batch-wise and continuously operated mode, and their efficiency in both pollutants removal and hydrogen gas production was elucidated. The parameters affecting the efficiency of the applied electrochemical processes, such as applied current density, pH, electroprocessing time and flow rate, were investigated. The electrochemical processing was monitored by measuring the chemical oxygen demand (COD) of treated wastewater. The electrocoagulation treatment conducted with current densities of 30, 60 and 90 mA/cm reduced the wastewater COD by about 67%, whereas the electrooxidation treatment at the same conditions yielded a COD removal of over 95%. The amount of produced hydrogen was 171 L/g COD removed from treated wastewater.
在这项工作中，我们研究了光伏太阳能在驱动电絮凝和电氧化电化学过程方面的应用，以修复钻井液废水，并以阴极产生的电解氢气的形式同时收获能量。电絮凝采用牺牲性铝电极进行，电氧化采用尺寸稳定的掺硼金刚石电极在分批和连续操作模式下进行，并阐明了它们在污染物去除和氢气生产方面的效率。研究了影响应用电化学过程效率的参数，例如施加的电流密度、pH 值、电处理时间和流速。通过测量处理后废水的化学需氧量 (COD) 来监测电化学处理。在 30、60 和 90 mA/cm 的电流密度下进行的电絮凝处理使废水 COD 降低了约 67%，而在相同条件下进行的电氧化处理使 COD 去除率超过 95%。从处理后的废水中去除 1 克 COD 可产生 171 升氢气。
