Scholarlink

<p>The escalating discharge of complex dye laden effluents from the textile industry demands the development of versatile and sustainable remediation materials. While keratin based nanofibers have been explored for biomedical applications, their deployment as pH switchable, dual-function adsorbents for both cationic and anionic dyes in textile wastewater remains largely unreported. This study demonstrates a green valorization of chicken feather waste into high-performance, pH switchable keratin/polyvinyl alcohol bio-nanofibrous membranes. Distinctively, a plant-derived biosurfactant (<i>Sapindus mukorossi</i>) was employed for feather pretreatment, ensuring an ecofriendly extraction process with a high keratin yield of 55.03 ± 4.47%. The resulting nanofibers, fabricated via electrospinning, exhibited a refined morphology, enhanced tensile strength, and excellent structural stability in aqueous environments. Adsorption investigations revealed a sophisticated pH-dependent mechanism: the membranes functioned as a molecular switch, effectively sequestering cationic Methylene Blue at alkaline pH and anionic Indigo Denisol at acidic pH. Equilibrium data reached a remarkable Langmuir calculated maximum capacity of 250&#xa0;mg/g for MB. Kinetic modeling demonstrated that the pseudo-second-order model provided an excellent fit for both dye systems (R<sup>2</sup> = 0.99 for MB; R<sup>2</sup> = 0.98 for ID), identifying chemisorption, mediated by electrostatic interactions and hydrogen bonding with the keratin functional groups (− NH₂, −COOH, −OH), as the primary rate-limiting mechanism. These findings provide a robust platform for the development of waste derived, smart nano-adsorbents, offering a dual-action solution for the circular economy and the sustainable treatment of multi-component industrial pollutants.</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

Sustainable pH switchable keratin/PVA nanofibers derived from soapberry cleaned feather waste for dual mode dye remediation

  • 期刊论文

  • 发表日期：

    2026年7月21日

查看全文
  • Ly Ta Ngoc,
  • Hong Phuong Pham Thi,
  • Huyen Suong Nguyen Thi

摘要

The escalating discharge of complex dye laden effluents from the textile industry demands the development of versatile and sustainable remediation materials. While keratin based nanofibers have been explored for biomedical applications, their deployment as pH switchable, dual-function adsorbents for both cationic and anionic dyes in textile wastewater remains largely unreported. This study demonstrates a green valorization of chicken feather waste into high-performance, pH switchable keratin/polyvinyl alcohol bio-nanofibrous membranes. Distinctively, a plant-derived biosurfactant (Sapindus mukorossi) was employed for feather pretreatment, ensuring an ecofriendly extraction process with a high keratin yield of 55.03 ± 4.47%. The resulting nanofibers, fabricated via electrospinning, exhibited a refined morphology, enhanced tensile strength, and excellent structural stability in aqueous environments. Adsorption investigations revealed a sophisticated pH-dependent mechanism: the membranes functioned as a molecular switch, effectively sequestering cationic Methylene Blue at alkaline pH and anionic Indigo Denisol at acidic pH. Equilibrium data reached a remarkable Langmuir calculated maximum capacity of 250 mg/g for MB. Kinetic modeling demonstrated that the pseudo-second-order model provided an excellent fit for both dye systems (R2 = 0.99 for MB; R2 = 0.98 for ID), identifying chemisorption, mediated by electrostatic interactions and hydrogen bonding with the keratin functional groups (− NH₂, −COOH, −OH), as the primary rate-limiting mechanism. These findings provide a robust platform for the development of waste derived, smart nano-adsorbents, offering a dual-action solution for the circular economy and the sustainable treatment of multi-component industrial pollutants.