Life-Cycle Burden Shifting in Solvent-Based Regeneration of PFOS-Laden Granular Activated Carbon
Yue Pang, Hao Guan, Wentian Zheng, jiayi Yuan, Runzhi Wang, Yumeng Zhao, Yifei Wang, Meng Sun
🤖 gxceed AI 要約
日本語
PFOS汚染水処理に用いる粒状活性炭（GAC）の溶媒再生についてLCAを実施。電力駆動の溶出と下流焼却が18の中間影響カテゴリで主要ホットスポットと特定。NaOH改質水・HCl改質エタノールは再生効率を高め影響を低減。水力電力はGWPを3.30/8.26 kg CO2e/kgまで下げるが水消費は230〜266%に増加し、カテゴリ間の負荷シフトを実証した。
English
An LCA of solvent-based regeneration of PFOS-laden granular activated carbon (GAC). Electricity-driven elution and downstream incineration are the dominant hotspots across 18 midpoint categories. NaOH-modified water and HCl-modified ethanol improve regeneration efficiency and cut impacts. Hydropower lowers GWP to 3.30 and 8.26 kg CO2e/kg but raises water consumption to 230-266% of baseline, demonstrating cross-category burden shifting.
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
PFAS規制強化が進む中、水処理インフラの脱炭素と汚染物質処理のトレードオフを示す。日本ではPFOS/PFOAの水道水基準や環境排出規制対応が進み、浄水・排水処理設備のライフサイクル環境負荷評価はSSBJのScope3算定や設備更新投資の意思決定に資する。
In the global GX context
As PFAS regulation tightens globally (EU restriction proposals, US EPA MCLs), this LCA quantifies the trade-offs between decarbonizing water-treatment infrastructure and managing PFAS-containing waste. It offers a methodological template for cross-category burden-shifting analysis relevant to ISSB/CSRD lifecycle disclosure and circular-economy claims around activated carbon.
👥 読者別の含意
🔬研究者:PFAS処理技術のLCAにおけるカテゴリ間負荷シフトの定量手法と、電力源・化学改質がライフサイクル影響に与える感度を学べる。
🏢実務担当者:水処理・PFAS除去設備の更新や再生方式選択において、GWPだけでなく水消費・廃棄物を含む複合影響で比較検討する際の参考になる。
🏛政策担当者:PFAS規制と脱炭素政策の整合を図る際、処理技術のライフサイクル負荷シフトを考慮した規制設計の必要性を示唆する。
📄 Abstract（原文）
Abstract Granular activated carbon (GAC) is widely used to remove perfluorooctane sulfonate (PFOS) from contaminated water, yet its sustainable regeneration remains challenging. Solvent-based regeneration preserves the carbon matrix but may shift environmental burdens toward solvent production, chemical use, energy demand, and downstream waste management. Here we present a life cycle assessment (LCA) of PFOS-laden GAC regeneration using deionized water (GAC-WR) and ethanol (GAC-ER). We identify electricity-driven elution and downstream incineration as the dominant environmental hotspots across 18 midpoint impact categories. Selected chemical-assisted configurations (NaOH-modified water and HCl-modified ethanol) improved regeneration efficiency and reduced environmental impacts under the evaluated conditions by reducing virgin GAC supplementation. An industrial-scale model incorporating equipment upscaling and thermal integration further mitigated laboratory-specific energy overestimation. Compared with the corresponding baseline scenarios using the global electricity mix, hydropower-based electricity reduces global warming potential to 3.30 and 8.26 kg CO2e kg–1 for GAC-WR and GAC-ER, respectively, while increasing life-cycle water consumption to 230% and 266% of the respective baselines. This cross-category burden shift demonstrates that reducing climate impacts does not necessarily reduce the broader life-cycle environmental footprint. Overall, sustainable solvent-based GAC regeneration requires balancing regeneration efficiency, energy supply, chemical inputs, solvent recovery, and management of PFAS-containing wastes.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.est.6c06818first seen 2026-10-19 05:03:26
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