Removal　of　steroid　hormones　from　aqueous　environment　is　of　prevailing　concern　because　of　their　adverse　impact　on　organisms.　Using　biochar　derived　from　biomass　as　adsorbent　to　remove　pollutants　has　become　more　popular　due　to　its　low　cost,　effectiveness,　and　sustainability.　This　study　evaluated　the　feasibility　of　applying　corn　straw　biochar　(CSB)　and　dewatered　sludge　biochar　(DSB)　to　reduce　17　beta-estradiol　(E2)　from　aquatic　solutions　by　adsorption.　The　experimental　results　showed　that　the　adsorption　kinetics　and　isotherm　behavior　of　E2　on　the　two　biochars　were　well　described　by　the　pseudo-second-order　(R-2　＞　0.93)　and　Langmuir　models　(R-2　＞　0.97).　CSB　has　higher　E2　adsorption　capacity　than　DSB,　and　the　maximum　adsorption　capacity　was　99.8　mg/g　obtained　from　Langmuir　model　at　298　K,　which　can　be　attributed　to　the　higher　surface　area,　porosity,　and　hydrophobicity　of　this　adsorbent.　Higher　pH　levels　(＞10.2)　decreased　the　adsorption　capacities　of　biochar　for　E2,　while　the　ionic　strength　did　not　significantly　affect　the　adsorption　process.　The　regeneration　ability　of　CSB　was　slightly　better　than　that　of　DSB.　The　possible　adsorption　mechanism　for　E2　on　biochar　is　suggested　as　pi-pi　interactions,　H-bonding,　and　micropores　filling.　These　results　indicated　that　CSB　has　more　potential　and　application　value　than　DSB　on　reducing　E2　from　aqueous　solutions　when　considering　economy　and　removal　performance.