Scholarlink

<p>The growing discharge of pollutants from industrial and agricultural activities has heightened environmental and public health concerns, with copper contamination remaining particularly problematic due to its persistence and toxicity in aquatic systems. This study introduces a green adsorbent based on carbon/chitosan aerogels (Car/CSA) synthesized from agricultural by-products and assesses their effectiveness in Cu<sup>2+</sup> removal. Carbon produced via pyrolysis and ball milling was blended with chitosan and freeze-dried to form aerogels with high porosity (95.85–98.76%) and low density (19.59–60.86&#xa0;mg/cm<sup>3</sup>), providing abundant active sites for adsorption. FTIR analysis confirmed interactions between carbon and chitosan through the attenuation of characteristic peaks, suggesting hydrogen-bonding integration while preserving active -OH and -NH<sub>2</sub> groups. SEM revealed a 3D porous network that varied with CS/Car ratios and solid content, with the optimal formulation exhibiting interconnected pores favorable for ion diffusion. EDS mapping verified the presence of C, N, and O functional elements and confirmed Cu attachment after adsorption. The aerogels achieved a maximum Cu(II) uptake of 62.75 ± 2.48&#xa0;mg/g, primarily attributed to amino-based complexation. Key operational parameters – including pH, dosage, initial concentration, and contact time – significantly influenced adsorption, with pH being the dominant factor. Response surface methodology (RSM) identified optimal conditions at 235.5&#xa0;mg/L Cu<sup>2+</sup> and 158.8&#xa0;min, predicting an uptake of 66.1&#xa0;mg/g, supported by ANOVA (F = 22.73, p &lt; 0.001). This work demonstrates the potential of Car/CSA as lightweight, biodegradable, and efficient adsorbents, offering an environmentally friendly and scalable solution for wastewater treatment and broader applications in sustainable water purification.</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

Green Remediation of Heavy Metals Using Chitosan-Carbon Aerogels Derived from Agricultural By-Products

  • 期刊论文

  • 发表日期：

    2026年1月7日

查看全文
  • Kien A. Le,
  • Huy T. A. Nguyen,
  • Nga H. N. Do,
  • Phung K. Le

摘要

The growing discharge of pollutants from industrial and agricultural activities has heightened environmental and public health concerns, with copper contamination remaining particularly problematic due to its persistence and toxicity in aquatic systems. This study introduces a green adsorbent based on carbon/chitosan aerogels (Car/CSA) synthesized from agricultural by-products and assesses their effectiveness in Cu2+ removal. Carbon produced via pyrolysis and ball milling was blended with chitosan and freeze-dried to form aerogels with high porosity (95.85–98.76%) and low density (19.59–60.86 mg/cm3), providing abundant active sites for adsorption. FTIR analysis confirmed interactions between carbon and chitosan through the attenuation of characteristic peaks, suggesting hydrogen-bonding integration while preserving active -OH and -NH2 groups. SEM revealed a 3D porous network that varied with CS/Car ratios and solid content, with the optimal formulation exhibiting interconnected pores favorable for ion diffusion. EDS mapping verified the presence of C, N, and O functional elements and confirmed Cu attachment after adsorption. The aerogels achieved a maximum Cu(II) uptake of 62.75 ± 2.48 mg/g, primarily attributed to amino-based complexation. Key operational parameters – including pH, dosage, initial concentration, and contact time – significantly influenced adsorption, with pH being the dominant factor. Response surface methodology (RSM) identified optimal conditions at 235.5 mg/L Cu2+ and 158.8 min, predicting an uptake of 66.1 mg/g, supported by ANOVA (F = 22.73, p < 0.001). This work demonstrates the potential of Car/CSA as lightweight, biodegradable, and efficient adsorbents, offering an environmentally friendly and scalable solution for wastewater treatment and broader applications in sustainable water purification.