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<p>In the present study, eight commercial dyes comprising acid dyes (acid orange 7, acid yellow 54), disperse dyes (disperse blue 5BR, disperse brown 1, disperse red 19), and reactive dyes (reactive orange 84, reactive red 152, reactive yellow 105) were subjected to electrocoagulation (EC) and anodic oxidation (AO) at 100 A/m<sup>2</sup> and pH = 7. EC&#xa0;treatment was employed using aluminium, iron, stainless-steel (SS), and AO using boron-doped diamond (BDD) electrode pairs. Spectrophotometric multiwavelength method was used to characterize dominant wavelength, hue, luminance, and purity of untreated and treated samples. EC with SS electrode pair gave 65% COD removal for acid orange 7, reactive yellow 105, and reactive red 152 and more than 80% for other dyes after 20&#xa0;min of treatment time. Real textile waste was treated with the best electrode pair (SS) using EC and compared with AO treatment. EC (17.1 kWh/kg<sub>COD</sub>) performed better as compared to AO (38.1 kWh/kg<sub>COD</sub>) with 50% saving in energy consumption. Also, EC treatment improved luminance from 16.1 to 78.2% and changed hue from blue-purple to greenish-yellow within 60 min&#xa0;of treatment time. A meta-analysis of published literature was done to propose the best operating parameters for different dyes.</p>

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Electrocoagulation and Anodic Oxidation for the Treatment of Commercial Dyes and Real Textile Effluent: Meta-analysis for Optimal Operating Conditions

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Aditi Sugha,
  • Vishakha Gilhotra,
  • Manpreet Singh Bhatti

摘要

In the present study, eight commercial dyes comprising acid dyes (acid orange 7, acid yellow 54), disperse dyes (disperse blue 5BR, disperse brown 1, disperse red 19), and reactive dyes (reactive orange 84, reactive red 152, reactive yellow 105) were subjected to electrocoagulation (EC) and anodic oxidation (AO) at 100 A/m2 and pH = 7. EC treatment was employed using aluminium, iron, stainless-steel (SS), and AO using boron-doped diamond (BDD) electrode pairs. Spectrophotometric multiwavelength method was used to characterize dominant wavelength, hue, luminance, and purity of untreated and treated samples. EC with SS electrode pair gave 65% COD removal for acid orange 7, reactive yellow 105, and reactive red 152 and more than 80% for other dyes after 20 min of treatment time. Real textile waste was treated with the best electrode pair (SS) using EC and compared with AO treatment. EC (17.1 kWh/kgCOD) performed better as compared to AO (38.1 kWh/kgCOD) with 50% saving in energy consumption. Also, EC treatment improved luminance from 16.1 to 78.2% and changed hue from blue-purple to greenish-yellow within 60 min of treatment time. A meta-analysis of published literature was done to propose the best operating parameters for different dyes.