13X分子筛处理含苯胺废水的实验研究

Experimental research on treatment of aniline-bearing wastewater using 13X molecular sieves

以天然岩石矿物为原料 ,经过较简单的工艺过程合成的 13X沸石分子筛用于吸附水中苯胺的实验研究 ,结果表明 :分子筛对苯胺的吸附速率非常快 ,吸附时间为 10min时 ,吸附基本达饱和 ;一般当分子筛用量为 10g L时 ,水中苯胺的去除率达95 % ;随着pH值的增加 ,苯胺在分子筛上的吸附率减小 ;温度增加 ,吸附率有所增加 ,但常温下 ,苯胺的吸附率也能达到93% ;13X分子筛对苯胺的最大吸附量可达 10mg g ,其吸附规律较好地符合Fruendlich吸附等温式 ;饱和了苯胺的分子筛 ,用质量浓度为 2 0 %、温度为 6 0℃的氯化钠溶液洗脱 ,解吸率近于 10 0 % ,且解吸后的分子筛在未经任何处理的情况下仍能吸附苯胺 ;说明采用 13X分子筛处理含苯胺废水 ,不仅吸附效果好 ,而且再生能力也强 。

The primary influential factors, capacities of adsorption and desorption on the treatment of aniline\|bearing wastewater using 13X molecular sieves synthesized from natural rock were experimentally investigated. The results showed that the ratio of adsorption reached a plateau value when the adsorption time was 10?min. The removal rates was 95% when the ratio of molecular sieves to wastewater was 10?g: 1?L,and increased with decreasing pH, increased with increasing temperature, but reached 93% under normal temperature.The saturation adsorbing capacities of aniline was 10?mg/g, and regularity of adsorption accorded with isothermal adsorption model of Fruendlich. Spent 13X molecular sieves could be regenerated by 20% NaCl under 60℃ without noticeable loss of capacity. Experimental researches indicate that 13X molecular sieves is suitable for the purification of phenol\|bearing wastewater.