천연제올라이트에 담지된 Ni/Fe 이중금속 복합소재 대량생산및 TCE 원위치 정화 적용 가능성 연구 = Assessment of the Mass Production of Ni/Fe Bimetallic Composite Supported by Natural Zeolites for in-situ TCE Degradation

다국어 초록 (Multilingual Abstract)

The mass production of Ni/Fe bimetallic composite supported by natural zeolites (Ni/Fe@Zeolite) was conducted throughpilot testing to implement in-situ remediation technology for soil and groundwater contaminated by trichloroethylene(TCE). Based on the successful outcomes of labscale synthesis, a bulk-scale production process was proposed, along withoptimized pre-treatment and synthesis protocols. The pilot test determined optimal conditions for the alkali treatment ofzeolite for enhanced yield and appropriate storage methods to prevent the oxidation of Ni/Fe@Zeolite. The bulk-synthesizedNi/Fe@Zeolite exhibited characteristics consistent with those of the lab-synthesized material. Additionally, improveddelivery efficiency and reduced aggregation of Ni/Fe@Zeolite in porous media were confirmed through the use of naturalzeolite support. Batch experiments for TCE degradation showed a removal efficiency of 32.45% using bulk-synthesizedNi/Fe@Zeoite, with the well-coated nickel (Ni) on the nZVI surface facilitating reductive TCE dechlorination. Thesandbox test simulating in-situ TCE degradation demonstrated a decomposition efficiency of 39.78%, indicating that bulkproducedNi/Fe@Zeolite could effectively target TCE and achieve dechlorination to ethylene and ethane without causingpore clogging. Acute ecotoxicity tests indicated no adverse effects, highlighting the significant potential of bulk-syntheisedNi/Fe@Zeolite as an eco-friendly in-situ remedial material for TCE degradation.

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