Scholarlink

<p>Polyaniline-naphthalene-sulfonic acid (PANI-NSA) nanotubes were synthesized and evaluated in this preliminary study for Cr(VI) removal from synthetic wastewater. SEM analysis showed that optimized synthesis conditions produced uniform nanotubes with additional surface spheres, potentially enhancing adsorption performance. Adsorption isotherms (Redlich-Peterson and Langmuir models) suggested a monolayer adsorption mechanism, while kinetic studies (Elovich and Wang two-phase models) indicated chemisorption-driven, diffusion-controlled adsorption. To explore the influence of synthesis conditions, temperature and water volume (as reaction eluent) were varied. PANI-NSA synthesized at 5&#xa0;°C with 80&#xa0;mL of water (more dilute) had an adsorption capacity of 374.9&#xa0;mg&#xa0;g⁻<sup>1</sup> (66.72% removal), increasing to 438.2&#xa0;mg&#xa0;g⁻<sup>1</sup> (79.28% removal) at 15&#xa0;°C with 20&#xa0;mL of water (i.e. more concentrated). While these results highlight promising trends, further detailed characterization and adsorption optimization studies are required to fully assess scalability and long-term application in industrial Cr(VI) remediation.</p> Graphical Abstract <p></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

Optimising synthesis conditions of PANI-NSA nanotubes for chromium removal

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月24日

查看全文
  • Nina Swart,
  • Luca Lohrentz,
  • Hendrik Brink

摘要

Polyaniline-naphthalene-sulfonic acid (PANI-NSA) nanotubes were synthesized and evaluated in this preliminary study for Cr(VI) removal from synthetic wastewater. SEM analysis showed that optimized synthesis conditions produced uniform nanotubes with additional surface spheres, potentially enhancing adsorption performance. Adsorption isotherms (Redlich-Peterson and Langmuir models) suggested a monolayer adsorption mechanism, while kinetic studies (Elovich and Wang two-phase models) indicated chemisorption-driven, diffusion-controlled adsorption. To explore the influence of synthesis conditions, temperature and water volume (as reaction eluent) were varied. PANI-NSA synthesized at 5 °C with 80 mL of water (more dilute) had an adsorption capacity of 374.9 mg g⁻1 (66.72% removal), increasing to 438.2 mg g⁻1 (79.28% removal) at 15 °C with 20 mL of water (i.e. more concentrated). While these results highlight promising trends, further detailed characterization and adsorption optimization studies are required to fully assess scalability and long-term application in industrial Cr(VI) remediation.

Graphical Abstract