Scholarlink

<p>Fabricating adsorbents with high adsorption capacity, exceptional stability, easy separation, excellent recyclability, and broad applicability for removing organic dyes from wastewater remains a significant challenge. In this study, a three-dimensional poly (vinyl alcohol)/polyaniline (PVA/PANI) hydrogel with easy separation and highly efficient, reusable adsorption of anionic dyes was successfully synthesized using a simple solution method under cryogenic conditions. The prepared hydrogels were characterized using infrared spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) mapping, elemental analysis, and thermogravimetric analysis (TGA). The results confirmed the successful incorporation of PANI(ES) particles into the hydrogel matrix. A well-defined hierarchical structure was observed, where PANI particles were coated onto the skeleton walls of the hydrogel. The adsorption performance of the hydrogel for anionic dyes was systematically evaluated under varying solution pH levels and initial dye concentrations. The experimental data revealed that the maximum adsorption efficiencies of the PVA/PANI hydrogel for methylene blue (MB), methyl orange (MO), trypan blue (TB), orange G (OG), and acid blue 25 (AB25) were 48%, 55%, 74%, 97%, and 95% at 25&#xa0;°C, respectively. Mechanistic studies indicated that electrostatic interactions play a key role in the adsorption of dyes. Overall, these findings demonstrate that the fabricated PVA/PANI hydrogel is an efficient and reusable adsorbent for the removal of anionic organic dyes from wastewater.</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

Conductive PANI-PVA hydrogel: A promising adsorbent for anionic dye removal in wastewater treatment

  • 期刊论文

  • 发表日期：

    2025年7月29日

查看全文
  • Leimapokpam Sophia Devi,
  • Roy Paily,
  • Ashok Kumar Dasmahapatra

摘要

Fabricating adsorbents with high adsorption capacity, exceptional stability, easy separation, excellent recyclability, and broad applicability for removing organic dyes from wastewater remains a significant challenge. In this study, a three-dimensional poly (vinyl alcohol)/polyaniline (PVA/PANI) hydrogel with easy separation and highly efficient, reusable adsorption of anionic dyes was successfully synthesized using a simple solution method under cryogenic conditions. The prepared hydrogels were characterized using infrared spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) mapping, elemental analysis, and thermogravimetric analysis (TGA). The results confirmed the successful incorporation of PANI(ES) particles into the hydrogel matrix. A well-defined hierarchical structure was observed, where PANI particles were coated onto the skeleton walls of the hydrogel. The adsorption performance of the hydrogel for anionic dyes was systematically evaluated under varying solution pH levels and initial dye concentrations. The experimental data revealed that the maximum adsorption efficiencies of the PVA/PANI hydrogel for methylene blue (MB), methyl orange (MO), trypan blue (TB), orange G (OG), and acid blue 25 (AB25) were 48%, 55%, 74%, 97%, and 95% at 25 °C, respectively. Mechanistic studies indicated that electrostatic interactions play a key role in the adsorption of dyes. Overall, these findings demonstrate that the fabricated PVA/PANI hydrogel is an efficient and reusable adsorbent for the removal of anionic organic dyes from wastewater.