Enhanced remediation of heavy metals contaminated soils with EK-PRB using β-CD/hydrothermal biochar by waste cotton as reactive barrier.
Heavy metals in the soil are major global environmental problems. Waste cotton was used to synthesize a novel β-CD/hydrothermal biochar (KCB), which is a low-cost and environment-friendly adsorbent for heavy metal soil remediation. KCB were used as reactive materials of electrokinetic-permeable reactive barrier (EK-PRB) to explore the removal characteristics of heavy metals. FTIR and XPS analysis revealed that KCB contained large numbers of surface functional groups. Adsorption of KCB for Pb2+ and Cd2+ reached 50.44 mg g-1 and 33.77 mg g-1, respectively. Metal ions in contaminated soil were removed by reactive barrier through electromigration, electrodialysis and electrophoresis, the removal efficiency of Pb2+ and Cd2+ in soil reached 92.87% and 86.19%. This finding proves that KCB/EK-PRB can be used as a cheap and green process to effectively remediate soils contaminated with heavy metals.
['Li|Yulin|Y|', 'Shao|Mengyu|M|', 'Huang|Manhong|M|', 'Sang|Wenjing|W|', 'Zheng|Shengyang|S|', 'Jiang|Nan|N|', 'Gao|Yanan|Y|']
D002606:Charcoal D052918:Environmental Restoration and Remediation D019216:Metals, Heavy D012987:Soil D012989:Soil Pollutants
Heavy metals Biochar Waste cotton Electrokinetic-permeable reactive barrier Adsorption Hydrothermal carbonization