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Treatment of intermediate landfill leachate using different anode materials in electrooxidation process
Environmental Progress & Sustainable Energy ( IF 2.8 ) Pub Date : 2021-07-22 , DOI: 10.1002/ep.13722
Orhan Taner Can 1 , Leyla Gazigil 2 , Ramazan Keyikoglu 1, 3
Affiliation  

This study aims to investigate the performances of widely used anode materials in the treatment of intermediate landfill leachate treatment by electrooxidation (EO) process. The raw leachate was collected from an 8-year-old landfill facility and had a chemical oxygen demand (COD) of 4660 mg/L, biological oxygen demand (BOD5) of 1370 mg/L, and total organic carbon (TOC) of 2260 mg/L. TOC and COD removal efficiencies of Boron-Doped Diamond (BDD), Pt, and four different Ti-based mixed metal oxide (MMO) anodes ((RuO2–TiO2, RuO2–IrO2, PtO2–IrO2, and IrO2–Ta2O5) were compared at the current densities of 25 mA/cm2, 75 mA/cm2, and 125 mA/cm2. At the highest current density, the BDD achieved 100% TOC and COD removal efficiencies in 240 min. BDD was followed by the Pt anode, which achieved 95.53% COD and 92.74% TOC removal efficiencies. The Pt electrode also had the lowest SEC values at all current densities. Although the performances of four MMO electrodes were very close, RuO2–TiO2 achieved a slightly higher performance than the others. It was concluded that Pt anode can be a promising alternative to BDD, which was 18 times more expensive, with its comparable pollutant removal performance and low specific energy consumption.

中文翻译:

不同阳极材料电氧化处理中间垃圾渗滤液

本研究旨在研究广泛使用的阳极材料在电氧化(EO)工艺处理中间垃圾渗滤液中的性能。未经处理的渗滤液是从一个有 8 年历史的垃圾填埋场收集的,化学需氧量 (COD) 为 4660 mg/L,生物需氧量 (BOD 5 ) 为 1370 mg/L,总有机碳 (TOC) 为2260 毫克/升。硼掺杂金刚石 (BDD)、Pt 和四种不同的钛基混合金属氧化物 (MMO) 阳极((RuO 2 –TiO 2、RuO 2 –IrO 2、PtO 2 –IrO 2和IrO 2 –Ta 2 O 5) 在 25 mA/cm 2、75 mA/cm 2和 125 mA/cm 2的电流密度下进行比较。在最高电流密度下,BDD 在 240 分钟内实现了 100% 的 TOC 和 COD 去除效率。BDD 之后是 Pt 阳极,它实现了 95.53% 的 COD 和 92.74% 的 TOC 去除效率。Pt 电极在所有电流密度下也具有最低的 SEC 值。虽然四个 MMO 电极的性能非常接近,但 RuO 2 -TiO 2 的性能略高于其他电极。得出的结论是,Pt 阳极可以成为 BDD 的有前途的替代品,BDD 的价格要高出 18 倍,具有可比的污染物去除性能和较低的比能耗。
更新日期:2021-07-22
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