Tetracycline　(TC)　and　arsenic　contaminants　are　two　main　pollutants　in　aquaculture　and　livestock　husbandry,　and　they　have　drawn　worldwide　attention.　To　address　this　issue,　a　novel　N-doped　carbon@magnesium　silicate　(CMS)　was　fabricated　via　a　facile　and　low-cost　hydrothermal　route,　adopting　glucose　and　ammonia　as　C　and　N　sources,　respectively.　The　synergetic　combination　of　carbon　and　magnesium　silicate　makes　CMS　possess　a　high　surface　area　of　201　m(2)/g　and　abundant　functional　groups.　Due　to　the　abundant　C-　and　N-containing　functional　groups　and　Mg-containing　adsorptive　sites,　the　maximum　adsorption　capacity　values　of　CMS　towards　As(V)　and　TC　are　498.75　mg/g　and　1228.5　mg/g,　respectively.　The　type　of　adsorption　of　As(V)　and　TC　onto　CMS　is　monolayer　adsorption.　An　adsorption　kinetic　study　revealed　that　the　mass　transfer　and　intraparticle　process　dominates　the　sorption　rate　of　As(V)　and　TC　adsorption　onto　CMS,　respectively.　Various　functional　groups　synthetically　participate　in　the　adsorption　process　through　complexion,　&　pi;-&　pi;　EDA　interactions,　and　hydrogen　bonds.　This　work　provides　a　one-step,　low-cost　route　to　fabricate　a　N-doped　carbonaceous　adsorbent　with　a　high　surface　area　and　abundant　functional　groups,　which　has　great　potential　in　the　application　of　practical　sewage　treatment.