Preparation of SBA-3 / PEHA and application in wastewater treatment of dyeing

SBA-3 mesoporous silica was modified by pentaethylene hexamine(PEHA),and the static electricity and hydrogen bond with amino group of SBA-3 / PEHA and acid dyes improved the absorption ability of mesoporous silica.Low temperature nitrogen adsorption desorption analysis was used to characterize SBA-3 and SBA-3 / PEHA samples.The modified absorbent has lower BET surface area,average pore size and pore volumes.The effect of various parameters on the removal of acid dyes such as contact time,initial concentration,adsorbent dose,agitation speed,solution pH and reaction temperature were studied in detail.The optimum absorption condition are as follows: 60 min,150 r / min,20 ℃,and the higher initial concentration and lower pH value achieved the higher adsorbing capacity.