Scholarlink

<p>The effectiveness of boron-doped diamond (BDD) and titanium metal-mixed oxides (Ti/MMO: Ti/RuO<sub>2</sub>-TiO<sub>2</sub> and Ti/RuO<sub>2</sub>-IrO<sub>2</sub>-Pt) anodes to treat cheese whey wastewater (CWW) by electrochemical oxidation (EO) was evaluated. The results show that EO with BDD is effective in the removal of organic compounds. Conversely, Ti/MMO anodes exhibit higher removals of nitrogenated compounds. After 8&#xa0;h of EO treatment at an applied current density of 500 A m<sup>−2</sup>, the biodegradability index increased from 0.55 to 0.81 with the BDD anode, while with Ti/MMO only reached 0.64. The acute toxicity of the CWW, before and after treatment, was assessed with the model organism <i>Daphnia magna</i>. The use of BDD showed favorable outcomes, leading to a reduction in ecotoxicity, which changed the CWW classification from “very toxic” to “toxic,” very close to the “non-toxic” level. Contrarywise, the use of Ti/MMO anodes led to an escalation of potentially harmful substances in the treated effluent. Still, Ti/MMO anodes provide the most favorable energy consumption when operating at current densities equal to or below 100 A m<sup>−2</sup>. While both Ti/RuO<sub>2</sub>-TiO<sub>2</sub> and Ti/RuO<sub>2</sub>-IrO<sub>2</sub>-Pt exhibit similar performance, the effectiveness of Ti/RuO<sub>2</sub>-TiO<sub>2</sub> is somewhat lower.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Treatment of cheese whey wastewater by electrochemical oxidation using BDD, Ti/RuO2-TiO2, and Ti/RuO2-IrO2-Pt anodes: ecotoxicological and energetic evaluation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月4日

查看全文
  • Imen Souli,
  • Annabel Fernandes,
  • Ana Lopes,
  • Inês Gomes,
  • Alexandra Afonso,
  • Lazhar Labiadh,
  • Salah Ammar

摘要

The effectiveness of boron-doped diamond (BDD) and titanium metal-mixed oxides (Ti/MMO: Ti/RuO2-TiO2 and Ti/RuO2-IrO2-Pt) anodes to treat cheese whey wastewater (CWW) by electrochemical oxidation (EO) was evaluated. The results show that EO with BDD is effective in the removal of organic compounds. Conversely, Ti/MMO anodes exhibit higher removals of nitrogenated compounds. After 8 h of EO treatment at an applied current density of 500 A m−2, the biodegradability index increased from 0.55 to 0.81 with the BDD anode, while with Ti/MMO only reached 0.64. The acute toxicity of the CWW, before and after treatment, was assessed with the model organism Daphnia magna. The use of BDD showed favorable outcomes, leading to a reduction in ecotoxicity, which changed the CWW classification from “very toxic” to “toxic,” very close to the “non-toxic” level. Contrarywise, the use of Ti/MMO anodes led to an escalation of potentially harmful substances in the treated effluent. Still, Ti/MMO anodes provide the most favorable energy consumption when operating at current densities equal to or below 100 A m−2. While both Ti/RuO2-TiO2 and Ti/RuO2-IrO2-Pt exhibit similar performance, the effectiveness of Ti/RuO2-TiO2 is somewhat lower.