Scholarlink

<p>Excess urea fertilizer leachates from agricultural fields and manufacturing effluents pose an environmental threat due to their effects on human health and persistence in water. In this study, a super-hydrophilic Curcumin-zirconia nanoconjugate (CMZ) blended cellulose acetate (CA) porous film biosorbent was developed for efficient urea removal from wastewater. The incorporation of eco-friendly compounds, curcumin and non-toxic zirconia as CMZ nanoconjugate in biopolymer CA led to superior and urea adsorption active sites. The hydrophilicity and porous structure of the films were characterized by SEM and Contact angle measurements. The optimized porous and hydrophilic concentration of CMZ in CA porous film was further analysed for crystallinity (XRD), functional groups (FTIR), binding efficiency (XPS), thermal stability (TGA) and high surface area (BET). All these characterisations revealed enhanced biosorbent surface properties. Batch adsorption experiments showed a higher urea adsorption capacity of 725&#xa0;mg/g of biosorbent within 30&#xa0;min at pH = 7. Statistical analysis of kinetic studies showed pseudo-second order (R<sup>2</sup> = 0.99). The urea adsorption rate-limiting step was found by Bangham pore diffusion and Boyd kinetic models and it is suggestive of diffusion in pores as well as on the surface of the film. Langmuir and Temkin adsorption isotherm were well-fitted, it signifies urea physisorption. The reusability test showed the stability up to five cycles. Furthermore, the XRD, FTIR and XPS post adsorption confirm the electrostatic, Vander Waals and the Hydrogen bonding. In addition, we have also confirmed the biodegradable nature of the films, which shows they are eco-friendly. The phytotoxicity was evaluated by <i>Trigonella foenum-graecum</i>, where urea wastewater shown no growth in the plant seedlings. The urea remediated water represent a enhanced plant growth with prominent root and shoot lengths. The CMZ functionalized CA film proved as an eco-friendly, sustainable biosorbent for urea wastewater remediation.</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

Eco-Friendly Curcumin–Zirconia Nanoconjugate Functionalized Cellulose Acetate Porous Film for Efficient Urea Adsorption from Wastewater and Phytotoxicity Evaluation

  • 期刊论文

  • 发表日期：

    2026年4月20日

查看全文
  • D. Deepsika,
  • T. Devasena

摘要

Excess urea fertilizer leachates from agricultural fields and manufacturing effluents pose an environmental threat due to their effects on human health and persistence in water. In this study, a super-hydrophilic Curcumin-zirconia nanoconjugate (CMZ) blended cellulose acetate (CA) porous film biosorbent was developed for efficient urea removal from wastewater. The incorporation of eco-friendly compounds, curcumin and non-toxic zirconia as CMZ nanoconjugate in biopolymer CA led to superior and urea adsorption active sites. The hydrophilicity and porous structure of the films were characterized by SEM and Contact angle measurements. The optimized porous and hydrophilic concentration of CMZ in CA porous film was further analysed for crystallinity (XRD), functional groups (FTIR), binding efficiency (XPS), thermal stability (TGA) and high surface area (BET). All these characterisations revealed enhanced biosorbent surface properties. Batch adsorption experiments showed a higher urea adsorption capacity of 725 mg/g of biosorbent within 30 min at pH = 7. Statistical analysis of kinetic studies showed pseudo-second order (R2 = 0.99). The urea adsorption rate-limiting step was found by Bangham pore diffusion and Boyd kinetic models and it is suggestive of diffusion in pores as well as on the surface of the film. Langmuir and Temkin adsorption isotherm were well-fitted, it signifies urea physisorption. The reusability test showed the stability up to five cycles. Furthermore, the XRD, FTIR and XPS post adsorption confirm the electrostatic, Vander Waals and the Hydrogen bonding. In addition, we have also confirmed the biodegradable nature of the films, which shows they are eco-friendly. The phytotoxicity was evaluated by Trigonella foenum-graecum, where urea wastewater shown no growth in the plant seedlings. The urea remediated water represent a enhanced plant growth with prominent root and shoot lengths. The CMZ functionalized CA film proved as an eco-friendly, sustainable biosorbent for urea wastewater remediation.