Scholarlink

<p>A novel lanthanum-modified biorefinery residue of wheat straw (La-BRWS) was synthesized, characterized, and applied for the removal of phosphate from aqueous solution. Characterization analyses confirmed the successful incorporation of lanthanum, which significantly enhanced the material’s adsorption performance. The results demonstrated that La-BRWS possessed a large specific surface area, a porous structure, and excellent stability across a wide initial pH range (1.01–10.83). Phosphate adsorption kinetics on La-BRWS were effectively described by both pseudo-first-order and pseudo-second-order models. The Langmuir isotherm model provided the best fit for the equilibrium data, indicating a maximum adsorption capacity of 55.74&#xa0;mg P/g at 50&#xa0;°C. The adsorption process was endothermic and spontaneous, reaching rapid equilibrium within 20&#xa0;min, and demonstrated excellent stability in the presence of co-existing ions (Cl<sup>−</sup>, NO<sub>3</sub><sup>−</sup>, HCO<sub>3</sub><sup>−</sup>, and SO<sub>4</sub><sup>2−</sup>). Regeneration with 5&#xa0;M NaOH retained over 99% of the adsorption capacity after five cycles. The phosphate adsorption mechanism involved ligand exchange, precipitation, and Lewis acid–base interaction. This study proposes La-BRWS as an economical and effective phosphate adsorbent derived from biorefinery residue of wheat straw, and provides new insights for reducing the cost of biorefinery.</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

Efficient phosphate adsorption using lanthanum-modified biorefinery residue of wheat straw

  • 期刊论文

  • 发表日期：

    2025年8月26日

查看全文
  • Guilong Yan,
  • Zexi Kan,
  • Shijie Ding,
  • Xitong Yuan,
  • Jianming Li,
  • Hao Wang,
  • Yuzhen Zhou,
  • Jianguo Wu,
  • Ci Jin

摘要

A novel lanthanum-modified biorefinery residue of wheat straw (La-BRWS) was synthesized, characterized, and applied for the removal of phosphate from aqueous solution. Characterization analyses confirmed the successful incorporation of lanthanum, which significantly enhanced the material’s adsorption performance. The results demonstrated that La-BRWS possessed a large specific surface area, a porous structure, and excellent stability across a wide initial pH range (1.01–10.83). Phosphate adsorption kinetics on La-BRWS were effectively described by both pseudo-first-order and pseudo-second-order models. The Langmuir isotherm model provided the best fit for the equilibrium data, indicating a maximum adsorption capacity of 55.74 mg P/g at 50 °C. The adsorption process was endothermic and spontaneous, reaching rapid equilibrium within 20 min, and demonstrated excellent stability in the presence of co-existing ions (Cl−, NO3−, HCO3−, and SO42−). Regeneration with 5 M NaOH retained over 99% of the adsorption capacity after five cycles. The phosphate adsorption mechanism involved ligand exchange, precipitation, and Lewis acid–base interaction. This study proposes La-BRWS as an economical and effective phosphate adsorbent derived from biorefinery residue of wheat straw, and provides new insights for reducing the cost of biorefinery.