Estrogens　have　great　harmfulness　to　living　organisms.　Adsorption　is　a　key　step　to　estrogen　removal　in　biological　process.　As　a　typical　estrogen　with　high　estrogen　activity,　17　beta-estradiol　(E2)　adsorption　behavior　by　anaerobic　granular　sludge　(AnGS)　combined　with　zero-valent　iron　(ZVI)　was　researched　here.　The　effect　of　pH　on　E2　adsorption　by　ZVI/AnGS　was　investigated　and　analyzed　through　adsorption　equilibrium,　adsorption　kinetics,　adsorption　thermodynamics,　and　zeta　potential.　ZVI/AnGS　had　high　E2　adsorption　capacity.　The　optimized　condition　was　pH　6　with　92.78%　E2　adsorption　efficiency,　4.95　mu　g.g　VSS-1　equilibrium　adsorption　capacity,　and　0.07　g.mu　g(-1).min(-1)　adsorption　rate.　E2　was　adsorbed　as　cationic　forms　or　neutral　inner-sphere　surface　complexes　at　a　pH　range　of　2-10.　The　adsorption　rate　was　controlled　by　film　diffusion　or　intraparticle　diffusion.　Freundlich　and　Langmuir　isotherms　were　both　suitable　for　describing　E2　adsorption　process,　which　was　exothermic　and　spontaneous.