铁(氢)氧化物介导的溶解性有机质、无机磷的固定及相互作用研究进展

铁(氢)氧化物介导的溶解性有机质(DOM)和无机磷(DIP)的固定在水生态系统中普遍存在，对碳、磷元素的生物地球化学循环有重要的影响. 铁(氢)氧化物主要通过吸附和共沉淀两种过程固定DOM和DIP，且铁(氢)氧化物、DOM和DIP三者存在复杂的相互作用. 本文主要从铁(氢)氧化物对DOM和DIP的固定，铁(氢)氧化物、DOM和DIP之间的相互影响等方面综述了相关研究进展，梳理了铁(氢)氧化物、DOM和DIP在吸附和共沉淀过程中的相互作用机制与影响因素. DOM的存在会通过占据铁(氢)氧化物表面吸附点位、络合、抑制铁水解沉淀等途径影响铁(氢)氧化物对DIP的固定; 且不同机制与DOM的不同性质如分子大小、芳香组分、羧基官能团含量等有关. 而DIP的存在会改变铁(氢)氧化物对DOM的固定分馏过程，改变溶液中DOM的组分和性质. 在明晰三者相互作用基础上，探讨了铁(氢)氧化物介导的DOM和DIP的固定过程对湖泊内源磷释放和碳埋藏的可能影响，并对未来的研究方向进行了展望.

Iron (hydr)oxides mediated immobilization and interaction of dissolved organic matter and inorganic phosphate: A review

Iron(hydr)oxides mediated immobilization of dissolved organic matter (DOM) and inorganic phosphate (DIP) is ubiquitous in aquatic ecosystems, which plays an important role in the biogeochemical cycle of carbon and phosphorus. The immobilization of DOM and DIP based on iron(hydr)oxides is mainly via adsorption and coprecipitation, and there is a complex interaction among iron(hydr)oxide, DOM and DIP. This paper reviewed the relevant studies on the immobilization of DOM and DIP by iron(hydr)oxides and their interactions. We discussed the interaction mechanism and influencing factors on the interaction among iron (hydr)oxides, DOM and DIP during the processes of adsorption and coprecipitation. The presence of DOM affects the fixation of DIP by occupying the adsorption sites on the surface of iron(hydr)oxides, complexing and inhibiting iron hydrolysis and precipitation. The properties of DOM, such as molecular size, aromatic components, carboxyl functional group content are the main decisive factors. The presence of DIP changes the immobilization and fractionation of DOM by iron(hydr)oxides, and thus the composition and properties of DOM in solution. After clarifying the interaction of iron(hydr)oxides, DOM and DIP, the potential effects of these interactions on internal phosphate release and carbon burial in lakes were discussed. The potential future research issues were proposed.