Agricultural　biomass　wastes　of　longan　seed　and　mangosteen　skin　were　collected　as　precursors　to　prepare　activated　carbons　(LS-AC-5　and　MS-AC-5,　respectively)　through　carbonization　at　medium　temperature　and　KOH　activation　at　high　temperature.　Their　pore　structures,　structural　properties　and　surface　morphologies　were　characterized　by　X-ray　diffractometer,　Brunauer-Emmett-Teller　surface　measurement　system,　and　scanning　electron　microscopy,　respectively.　Effects　of　contact　time　and　pH　on　adsorption　performances　of　samples　were　investigated　by　removal　of　Pb(II)　ions　and　Rhodamine-b　from　aqueous　solutions.　Experimental　adsorption　isotherms　of　Rhodamine-b　and　Pb(II)　ions　on　LS-AC-5　and　MS-AC-5　fitted　well　with　the　Langmuir　model.　Results　further　showed　that　MS-AC-5　exhibited　a　larger　surface　area　of　2960.56　m(2)/g　and　larger　portions　of　micropores　and　mesopores　(pore　volume　of　1.77　cm(3)/g)　than　LS-AC-5　(surface　area:　2728.98　m(2)/g;　pore　volume:　1.39　cm(3)/g).　Maximum　monolayer　adsorption　capabilities　of　1265.82　and　117.65　mg/g　for　Rhodamine-b　and　Pb(II)　ions　on　MS-AC-5　were　higher　than　those　on　LS-AC-5　(1000.20　and　107.53　mg/g),　respectively.