Scholarlink

<p>This research aims to produce biochar from date palm waste biomass with added catalysts (zeolite and bentonite) using a reactor (tube furnace) via slow pyrolysis at 500&#xa0;°C for one hour and evaluate the resulting biochar suitability for ammonium (NH<sub>4</sub><sup>+</sup>) adsorption. Physicochemical characteristics of biomass, biochar, and catalysts were studied. The results show high pH (8.65), carbon (41.03%), nitrogen (2.57%), hydrogen (5.77%) contents, and CEC (23.40&#xa0;meq/100&#xa0;g) for biochar without catalysts compared with biomass. Scanning electron microscope (SEM) analysis showed that the biochar without catalysts has a rough surface and pores of varying sizes, resulting in a relatively high specific surface area (39.52 m<sup>2</sup>/g), a critical feature for sorbent materials, and the interior of the biochar had evident, homogenous pores that formed cylinder-shaped structures. The findings of Fourier transformation infrared (FTIR) analysis conclude that biochar shows oxygen-functional groups (<i>i.e</i>., ‒OH and C‒O‒C). Biochars produced from all treatments were tested for ammonium removal at different concentrations, ranging from 10 to 200&#xa0;ppm. The results showed that all biochars possess a high sorption affinity for ammonium, achieving an adsorption capacity of ~ 14&#xa0;mg/g, which could potentially be used for ammonia removal from poultry farms. The isotherms and kinetic adsorption models were applied to investigate the adsorption mechanism. The sorption isotherms were simulated by the Freundlich and Langmuir models. Both models reasonably well describe the isotherm data for NH<sub>4</sub><sup>+</sup> removal from solutions (R<sup>2</sup> = 0.994 and 0.911, respectively), and the non-linear Freundlich and Langmuir models more closely match the experimental data. Furthermore, the results demonstrate that the pseudo-second-order model is suitable for modelling adsorption kinetics (R<sup>2</sup> = 0.94).</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

Catalyzed biochar from date palm waste for ammonium removal: potential application in poultry farms for ammonia mitigation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月17日

查看全文
  • Shymaa Saad Sayed Ibrahim,
  • Yossry Bayoumy Abd-Elhay,
  • Mohamed Mustafa Elkoly,
  • Ahmed El-Raie Emam Suliman,
  • Badr Ali Mohamed

摘要

This research aims to produce biochar from date palm waste biomass with added catalysts (zeolite and bentonite) using a reactor (tube furnace) via slow pyrolysis at 500 °C for one hour and evaluate the resulting biochar suitability for ammonium (NH4+) adsorption. Physicochemical characteristics of biomass, biochar, and catalysts were studied. The results show high pH (8.65), carbon (41.03%), nitrogen (2.57%), hydrogen (5.77%) contents, and CEC (23.40 meq/100 g) for biochar without catalysts compared with biomass. Scanning electron microscope (SEM) analysis showed that the biochar without catalysts has a rough surface and pores of varying sizes, resulting in a relatively high specific surface area (39.52 m2/g), a critical feature for sorbent materials, and the interior of the biochar had evident, homogenous pores that formed cylinder-shaped structures. The findings of Fourier transformation infrared (FTIR) analysis conclude that biochar shows oxygen-functional groups (i.e., ‒OH and C‒O‒C). Biochars produced from all treatments were tested for ammonium removal at different concentrations, ranging from 10 to 200 ppm. The results showed that all biochars possess a high sorption affinity for ammonium, achieving an adsorption capacity of ~ 14 mg/g, which could potentially be used for ammonia removal from poultry farms. The isotherms and kinetic adsorption models were applied to investigate the adsorption mechanism. The sorption isotherms were simulated by the Freundlich and Langmuir models. Both models reasonably well describe the isotherm data for NH4+ removal from solutions (R2 = 0.994 and 0.911, respectively), and the non-linear Freundlich and Langmuir models more closely match the experimental data. Furthermore, the results demonstrate that the pseudo-second-order model is suitable for modelling adsorption kinetics (R2 = 0.94).