改性石英砂净化海水的试验研究

摘要

采用碱性沉积蒸发法制备了6种改性石英砂，并进行了SEM分析及去除海水中污染物的静态吸附试验。试验结果表明：与石英砂平滑表面相比，改性砂表面呈凹凸不平的多孔结构，并且被改性剂所覆盖，这种表面形貌的差异使改性砂具有较大的比表面积和较强的吸附能力。石英砂经改性后可提高截污和吸附能力，改善出水水质，适用于海水的净化处理，具有一定的应用前景。%Six k inds of modified quartz sands have successfully been prepared by alkaline sedimentary evaporation process. SEM analysis and static adsorption tests on the removal of pollutants from seawater have been carried out. The results show that compared with the smooth surfaces of quartz ,the modified sands have surfaces with rugged and porous structures,and are covered by modifiers. The appearance difference of this kind of surfaces makes the modified sands have larger specific surface area and stronger adsorbability. Modified quartz sands can improve pollu-tant interception capacity and adsorption capacity,so as to improve water quality. Modified quartz sands are suitable for purifying treatment of seawater,having certain application prospects.