Phosphoric acid-assisted ball-milling modification of reed straw biochar for improved adsorption performance

IF 7 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2026-08-01 Epub Date: 2026-03-09 DOI:10.1016/j.biombioe.2026.109234

Wensheng Yang , Yumeng Ren , Jinze Li , Yulin Zhao , Di Wang , Geng Chen , Yingying Zhu

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Abstract

Biochar is a sustainable material for wastewater remediation, yet its efficiency is highly determined by feedstock selection and modification strategy. To address this, a series of biochars were synthesized from diverse biomass sources via chemical impregnation and pyrolysis. The best performing feedstock and chemical combination was then optimized by fine-tuning the chemical concentration and ball-milling time to further enhance its performance. Ball-milled phosphoric acid biochar (Q-PBC) demonstrated outstanding adsorption of Rhodamine B (RhB), with a specific surface area of 316.348 m²/g and a maximum capacity of 401.7 mg/g. Adsorption followed pseudo-second-order kinetics and the Langmuir isotherm, suggesting monolayer chemisorption. Moreover, Q-PBC exhibited strong pH tolerance across a wide pH range, owing to the introduction of stable phosphorus-containing functional groups. Notably, Q-PBC demonstrated stable adsorption performance over successive regeneration cycles, indicating good structural stability and recyclability. This work identifies reed straw-derived, phosphoric acid-modified biochar as a high-performance and recyclable adsorbent, offering practical insights into the design of efficient materials for organic wastewater treatment.

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磷酸辅助球磨改性芦苇秸秆生物炭提高吸附性能

生物炭是一种可持续的废水修复材料，但其效率在很大程度上取决于原料的选择和改性策略。为了解决这一问题，以不同的生物质为原料，通过化学浸渍和热解合成了一系列生物炭。通过对原料浓度和球磨时间的微调，优化出最佳的原料和化学组合，进一步提高其性能。球磨磷酸生物炭（Q-PBC）对罗丹明B （RhB）具有良好的吸附性能，比表面积为316.348 m2/g，最大吸附容量为401.7 mg/g。吸附遵循拟二级动力学和Langmuir等温线，表明为单层化学吸附。此外，由于引入了稳定的含磷官能团，Q-PBC在很宽的pH范围内表现出很强的pH耐受性。值得注意的是，Q-PBC在连续的再生循环中表现出稳定的吸附性能，表明了良好的结构稳定性和可回收性。这项工作确定了芦苇秸秆衍生的，磷酸修饰的生物炭是一种高性能和可回收的吸附剂，为有机废水处理高效材料的设计提供了实际的见解。

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.