Scholarlink

<p>The persistence of ciprofloxacin (CIP) in pharmaceutical wastewater poses significant environmental challenges due to its resistance to conventional treatment processes. This study has investigated the degradation of CIP by employing catalytic wet peroxide oxidation process with two different catalysts; Ni-Co spinel and corn cob derived biochar supported Ni-Co using hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) as the oxidizing agent. Catalyst characterization using FTIR, XRD, SEM, EDS, and BET analyses confirmed the formation of a well-defined spinel structure and successful incorporation of Ni–Co species onto the biochar matrix. Box-Behnken design (BBD) of response surface methodology (RSM) was employed to optimize the operational parameters during catalytic treatment. BBD studies were conducted under conditions that included varying pH levels (4–8), catalyst dosages (0.1–0.3&#xa0;g/L) and reaction time (20–70&#xa0;min). Optimal conditions for each catalyst were found as follows; pH = 5.2, dosage = 0.24&#xa0;g/L and time = 67&#xa0;min. For the Ni-Co spinel, the percentage of removal of CIP was 78.94% while for the Ni-Co/biochar, it was 88.5%. The developed mathematical models demonstrated high statistical significance (R<sup>2</sup> ≈ 0.99) along with non-significant lack-of-fit values demonstrating their reliability. Based on kinetic analyses, both systems have been determined to exhibit first order kinetics with larger rate constants observed for the Ni-Co/biochar system. Therefore, the enhanced performance of the Ni-Co/biochar system can be attributed to the adsorptive properties provided by the biochar in combination with oxidative mechanisms as well as improved electronic transfer in comparison to the Ni-Co spinel.</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

Comparative study of Ni–Co spinel and biochar supported catalysts for ciprofloxacin degradation: kinetic study and RSM optimization

  • 期刊论文

  • 发表日期：

    2026年6月24日

查看全文
  • Neha Kulshreshtha,
  • Vishal Kumar Sandhwar

摘要

The persistence of ciprofloxacin (CIP) in pharmaceutical wastewater poses significant environmental challenges due to its resistance to conventional treatment processes. This study has investigated the degradation of CIP by employing catalytic wet peroxide oxidation process with two different catalysts; Ni-Co spinel and corn cob derived biochar supported Ni-Co using hydrogen peroxide (H2O2) as the oxidizing agent. Catalyst characterization using FTIR, XRD, SEM, EDS, and BET analyses confirmed the formation of a well-defined spinel structure and successful incorporation of Ni–Co species onto the biochar matrix. Box-Behnken design (BBD) of response surface methodology (RSM) was employed to optimize the operational parameters during catalytic treatment. BBD studies were conducted under conditions that included varying pH levels (4–8), catalyst dosages (0.1–0.3 g/L) and reaction time (20–70 min). Optimal conditions for each catalyst were found as follows; pH = 5.2, dosage = 0.24 g/L and time = 67 min. For the Ni-Co spinel, the percentage of removal of CIP was 78.94% while for the Ni-Co/biochar, it was 88.5%. The developed mathematical models demonstrated high statistical significance (R2 ≈ 0.99) along with non-significant lack-of-fit values demonstrating their reliability. Based on kinetic analyses, both systems have been determined to exhibit first order kinetics with larger rate constants observed for the Ni-Co/biochar system. Therefore, the enhanced performance of the Ni-Co/biochar system can be attributed to the adsorptive properties provided by the biochar in combination with oxidative mechanisms as well as improved electronic transfer in comparison to the Ni-Co spinel.