Surface　morphology　of　zeolite　before　and　after　modified　was　analyzed　through　the　particle　strength,　scanning　electron　microscope　(SEM)　and　energy　dispersive　spectroscopy　(EDS)　and　point　of　zero　charge　(pHPZC).　Adsorption　studies　were　carried　out　at　different　pH,　zeolite　dosage,　initial　ammonium　concentrations　and　temperature.　Adsorption　mechanism　was　measured　through　the　adsorption　isotherm　and　adsorption　dynamics.　The　feature　of　NaCl　modified　zeolite　included　increased　particle　strength,　a　rough　surface,　and　enlarged　pore　size.　It　was　also　found　that　sodium　ions　would　enter　the　zeolite　internal　through　ion　exchange.　The　experimental　results　showed　that　the　best　adsorption　condition　was　pH　value　of　7,　zeolite　dosage　of　8g/L　and　temperature　at　35.　The　study　also　revealed　that　equilibrium　adsorption　capacity　(qe)　was　positive　correlation　with　initial　ammonium　concentration.　Adsorption　data　was　fitted　better　to　Langmuir　adsorption　isotherms,　with　maximal　adsorption　capacity　of　13.210mg/g.　The　results　of　kinetics　study　indicated　that　the　pseudo-second-order　model　fitted　to　the　experimental　data　well.　These　results　therefore　proved　that　NaCl　modified　zeolite　could　be　effectively　used　as　a　low-cost　adsorbent　for　the　removal　of　ammonium　from　wastewater.　©　2016,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.