Herein,　zero-valent　iron　nanoadsorbents　were　synthesized　by　hydrothermal　and　coprecipitation　methods.　The　structure　and　morphology　of　the　materials　were　characterized　through　X-ray　diffraction,　energy-dispersive　X-ray　spectroscopy　(EDS),　and　scanning　electron　microscopy　with　EDS.　The　adsorption　performance　of　IP　2038　10　20　On:　Tue　12　Sep　2023　02:33　11　nanoscale　Fe2O3　nanomaterials　was　evaluated.　Additionally,　adsorption　experiments　were　conducted　with　Copyright:　American　Scientiic　Publishe　s　varying　amounts　of　nanomaterials　and　initial　concentrations　of　dissolved　organic　carbon　(DOC)　in　water.　D　livered　by　Ingenta　The　results　showed　that　as　the　initial　concentration　of　the　DOC　in　water　increased,　the　efficiency　of　organic　carbon　removal　gradually　decreased.　In　particular,　when　the　initial　concentration　of　the　DOC　increased　from　20　to　35　mg/L,　the　removal　efficiency　of　the　nanomaterials　decreased　from　85%　to　55%.　Furthermore,　a　considerable　decrease　in　the　removal　efficiency　was　observed　between　30　to　60　min.　After　60　min,　the　efficiency　of　organic　carbon　removal　was　almost　constant.　The　increase　in　the　initial　concentration　of　DOC　in　water　resulted　in　a　gradual　decrease　in　the　efficiency　of　its　removal.　The　decrease　in　the　organic　carbon　content　in　water　lead　to　a　scarcity　of　carbon　sources　for　microbial　reproduction,　thereby　reducing　the　microbial　population　considerably.　This　study　provides　a　clear　evidence　of　the　pronounced　carbon　fixation　effect　of　nanomaterials　and　their　ability　to　control　microbial　population　in　aquatic　ecosystems.