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Functional Pore Accessibility and Surface Chemistry Govern Adsorption in Biomass-Derived Activated Carbons Under Real Aqueous Conditions

Nelson de Jesús López Acopa, C.E. Santolalla-Vargas, María Patricia Torres-Magaña, D. S. García-Zaleta, Juan Carlos Arévalo‐Pérez, G. Torres, Areli Carrera-Lanestosa, Pedro Ávila García, Héctor Martínez‐García, Zenaida Guerra‐Que

Materials📚 査読済 / ジャーナル2026-06-26#その他
DOI: 10.3390/ma19132743
原典: https://doi.org/10.3390/ma19132743

🤖 gxceed AI 要約

日本語

バイオマス由来活性炭（ココア殻、スイカ皮、パイナップル冠）を用いた実際の富栄養化湖水からのCOD除去性能を評価。低BET表面積でも、細孔径分布や表面化学が吸着性能を支配することを実証。酸活性化した試料は平均細孔径1.720nmでほぼ完全なCOD除去を達成した。

English

This study evaluates biomass-derived activated carbons from cocoa pod husk, watermelon peel, and pineapple crown for COD removal from real eutrophic lagoon water. Despite low BET surface areas, adsorption performance is governed by pore architecture and surface chemistry rather than surface area alone. Acid-activated samples achieved near-complete COD removal with a narrow average pore size of 1.720 nm.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

本論文は直接的な日本のGX文脈には該当しないが、バイオマス廃棄物の有効活用という観点から、日本の循環型社会形成や廃棄物処理政策に関連する可能性がある。

In the global GX context

While not directly related to core GX topics, this work contributes to sustainable water treatment using biomass waste, aligning with global circular economy and waste-to-resource initiatives.

👥 読者別の含意

🔬研究者:Materials scientists and water treatment researchers can learn about the importance of pore accessibility and surface chemistry over BET surface area in real-water adsorption.

🏢実務担当者:Water treatment professionals may consider using biomass-derived activated carbons as sustainable alternatives for polishing eutrophic water.

📄 Abstract（原文）

Biomass-derived activated carbons (ACs) are promising sustainable adsorbents for water polishing; however, their performance in real aqueous matrices cannot always be predicted from BET surface area alone. In this study, chemically activated biomass-derived carbonaceous adsorbents were prepared from Cocoa Pod Husk (CPH), Watermelon Peel (WP), and Pineapple Crown (PC) and evaluated for Chemical Oxygen Demand (COD) removal from real eutrophic lagoon water. The materials were characterized by N2 adsorption–desorption analysis, including BET surface area and BJH pore-size assessment, XRD, Raman spectroscopy, FTIR, UV–Vis diffuse reflectance spectroscopy, and pHPZC analysis. Although all adsorbents exhibited low N2-BET surface areas, adsorption performance was governed by apparent functional pore accessibility inferred from adsorption behavior, pore size distribution, surface chemistry, structural disorder, electronic delocalization, and surface charge. Among the acid-activated samples, ACPCSA5 showed a narrow average pore size of 1.720 nm and achieved near-complete COD removal. Its superior performance was associated with oxygen-containing functional groups, partially developed sp2 carbon domains, lower optical band gap, BJH-derived pore architecture, and favorable surface charge at lagoon pH. The Microbial Regrowth Potential Index (MRPI) was introduced only as a conservative COD-based proxy, not as a validated biological indicator. Overall, this work demonstrates that adsorption in real-water matrices depends on accessible pore architecture and multifunctional surface chemistry rather than BET surface area alone.

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