【摘要】 饮用水输配系统中广泛存在的锰、铁沉积物可能参与溶解铝的迁移与转化过程，进而影响铝的赋存形态与暴露风险。为此，考察了不同条件下锰氧化物与铁氧化物对溶解铝的富集，并探讨相关作用机制。结果表明，锰氧化物和铁氧化物浓度为1 mg/L时，对浓度为150μg/L的铝均表现出良好的富集能力。锰、铁氧化物形成途径对铝富集能力具有显著影响，同等浓度下，Mn（Ⅱ）、Fe（Ⅲ）原位生成的氧化物对溶解铝的富集效果强于预生成的锰、铁氧化物。pH是影响锰、铁氧化物富集溶解铝的关键因素，随pH升高，富集能力明显下降。相比于纯水配水，实际龙头水中锰、铁氧化物对溶解铝的富集能力更强，表明多价离子和天然有机物等成分可能协同促进富集过程。更多还原

【Abstract】 Manganese and iron deposits, which are widely present in drinking water distribution systems, may participate in the migration and transformation of dissolved aluminum, thereby influencing its speciation and exposure risk. This study investigated the enrichment behavior of dissolved aluminum by manganese and iron oxides under various conditions and explored the underlying mechanisms. The results showed that at an oxide concentration of 1 mg/L and an initial aluminum concentration of 150 μg/L, both manganese and iron oxides exhibited significant enrichment capacities. The formation pathway of the oxides had a pronounced effect on aluminum enrichment. Under the same concentration, manganese and iron oxides generated in situ from Mn( Ⅱ) and Fe( Ⅲ) exhibited higher aluminum enrichment capacities than their preformed counterparts. pH was identified as a key factor influencing the enrichment process, with increasing pH leading to a notable decline in enrichment capacities. Compared to pure water, manganese and iron oxides showed enhanced aluminum enrichment in actual tap water, suggesting that multivalent ions and natural organic matter may synergistically promote the enrichment process.更多还原