垂直電圧活性化修飾活性炭/炭素繊維反応バリアを用いたCu・Pb汚染黄土の電気動態修復の強化
Enhanced Electrokinetic Remediation of Cu- and Pb-Contaminated Loess Using a Vertical Voltage-Activated Modified Activated Carbon/Carbon Fibre Reactive Barrier (原題)
Haiyong Cai, Fang Jin, Xiang Zhu, Wenle Hu, Yanqiang Du, Shixu Zhang, Zheng Yuan
🤖 gxceed AI 要約
日本語
黄土の低透水性・高粘土含有量が従来の電気動態修復の効率を制限する中、本研究は新規ハイドロゲル電極とMAC/CF反応バリアを統合した強化システムを開発。垂直電圧30VでCu除去率69-80%、Pb除去率32-36%を達成し、メカニズム解明により修復効率向上に寄与。
English
This study develops an enhanced electrokinetic remediation system integrating novel hydrogel electrodes and a MAC/CF permeable reactive barrier for Cu- and Pb-contaminated loess. Optimal vertical voltage of 30V achieved Cu and Pb removal efficiencies of 69-80% and 32-36% within 72h, with mechanistic insights into migration-adsorption coupling.
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
土壌汚染対策法に基づく土壌修復は日本でも重要だが、本技術は特定の土壌条件に依存し、GX政策との直接的な連携は限定的。日本の読者には環境修復技術の参考として有用。
In the global GX context
While soil remediation is relevant to sustainable land use, this specific electrokinetic technology is not directly tied to global GX frameworks like TCFD or ISSB. It offers niche insights for environmental engineering but limited relevance to climate disclosure.
👥 読者別の含意
🔬研究者:Soil remediation researchers can gain insights into enhanced electrokinetic methods for low-permeability soils.
📄 Abstract（原文）
Copper and lead contamination in loess areas poses a potential threat to soil environmental quality and sustainable land use, while the low permeability, high clay content, and strong buffering capacity of loess often limit the efficiency of conventional electrokinetic (EK) remediation. This study developed an enhanced EK system integrating novel hydrogel (NH) electrodes, a poly(diallyldimethylammonium chloride)-modified activated carbon/carbon fibre (MAC/CF) permeable reactive barrier (PRB), and a vertical voltage for the remediation of Cu- and Pb-contaminated loess. The effects of vertical voltage (0, 10, 20, 30, and 40 V) on EK behaviour, contaminant migration, and removal performance were investigated. The results showed that the MAC/CF PRB improved electrical stability, enhanced electroosmotic transport, and regulated pH evolution by providing conductive pathways and reactive sites for OH− capture and metal adsorption. Compared with the system without a PRB, the accumulated electroosmotic flow (EOF) increased from approximately 680 to 980 mL. The vertical voltage further promoted Cu2+ and Pb2+ redistribution into the PRB and enhanced the migration–adsorption coupling process. The optimal voltage of 30 V achieved the best remediation performance, with Cu and Pb removal efficiencies of 69–80% and 32–36%, respectively, within 72 h at initial concentrations of 500 mg kg−1. Mechanistic analysis revealed that the vertical voltage transformed the MAC/CF barrier from a passive adsorption layer into an electrically activated migration–capture interface. The synergistic effects of ion transport regulation, OH− buffering, conductive network construction, and heavy metal adsorption effectively suppressed precipitation-induced focusing and improved remediation efficiency. This study provides a promising strategy for enhancing EK remediation of low-permeability and structurally sensitive soils.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/su18168449first seen 2026-08-27 05:04:16
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