Immobilizing lead using loess and nanoscale zerovalent iron (nZVI)-amended loess: Insights from macroscopic and microscopic tests

• DOI: 10.1016/j.eti.2023.103228
• Publication Date: 2023-06-01T20:30:47Z
• Authors: Shaojie Wen; Wen-Chieh Cheng; Dongfeng Li; Wenle Hu
• Keywords: Zerovalent iron

Lead (Pb) can accumulate in organisms causing damage to liver and kidney functions. Preventing Pb2+ migration surrounding environments is considered of great necessity. This study explored the potential applying loess nanoscale zerovalent iron-amended (nZVI-AL) Pb immobilization. The static equilibrium adsorption analyses showed that by nZVI-AL was classed as homogeneous monolayer surface adsorption. nZVI particles provided with more sites for their attachment prevented using Fe-O Fe-O-H bonds. Their encouraged formation cerussite precipitation, which not only caused reduction diffraction peak calcite mineral but shifted band from around 1430 cm−1 a lower wavenumber. unbonded electrons functional groups on quartz coordinated empty orbit Pb2+, leaving at 3.3429 Å. Further, Ca2+ distribution sample blurry because retardant depletion particles. Moreover, hydroxyl bound via hydrogen bonds were formed amendment, displacing 701 698 cm−1. clay minerals well form Pb(OH)+, corresponding O-H stretching vibrations 3616 3430 respectively. shows its landfills bottom liner system.