Department of Marine Environmental Engineering, National Kaohsiung Marine University, Kaohsiung City, Taiwan.
Department of Marine Environmental Engineering, National Kaohsiung Marine University, Kaohsiung City, Taiwan.
Bioresour Technol. 2017 Dec;245(Pt A):188-195. doi: 10.1016/j.biortech.2017.08.204. Epub 2017 Sep 21.
This study developed a new and cost-effective method for the remediation of marine sediments contaminated with PAHs. FeO particles were synthesized as the active component, supported on bamboo biochar (BB) to form a composite catalyst (FeO-BB). The effects of critical parameters, including the initial pH, sodium persulfate (PS) concentration, and dose of catalyst were investigated. The concentration of high-molecular-weight PAHs in sediments was much higher than that of low-molecular-weight PAHs; pyrene was an especially prominent marker of PAH contamination in sediments. FeO-BB/PS exhibited a substantial improvement in PAH degradation efficiency (degradation rate: FeO-BB/PS, 86%; PS, 14%) at a PS concentration of 1.7×10M, catalyst concentration of 3.33g/L, and pH of 3.0. The results of this study demonstrate that possible activation mechanisms include Fe-Fe redox coupling and electron shuttling that mediates electron transfer of the BB oxygen functional groups, promoting the generation of SO in the FeO-BB/PS system.
本研究开发了一种新的、具有成本效益的方法，用于修复受多环芳烃（PAHs）污染的海洋沉积物。FeO 颗粒被合成作为活性成分，负载在竹生物炭（BB）上形成复合催化剂（FeO-BB）。研究了关键参数的影响，包括初始 pH 值、过硫酸钠（PS）浓度和催化剂用量。沉积物中高分子量 PAHs 的浓度明显高于低分子量 PAHs；苝是沉积物中 PAH 污染的一个特别显著的标志物。在 PS 浓度为 1.7×10M、催化剂浓度为 3.33g/L、pH 值为 3.0 的条件下，FeO-BB/PS 对 PAH 的降解效率（降解率：FeO-BB/PS，86%；PS，14%）有显著提高。本研究结果表明，可能的活化机制包括 Fe-Fe 氧化还原偶联和电子穿梭，这介导了 BB 氧官能团的电子转移，促进了 FeO-BB/PS 体系中 SO 的生成。
