用吸附处理工艺去除饮用水中阴离子表面活性物质的实验研究

采用活性炭、沸石和硅藻土三种常用吸附剂,通过静态实验和动态实验对饮用水中低浓度阴离子表面活性物质(LAS)的去除进行了考察.静态实验结果表明,用吸附法可有效地去除LAS,并且在通常条件下受温度、pH影响不显著,但在有机物如腐殖酸浓度较高的情况下LAS的吸附明显受到抑制.动态实验比较了不同LAS浓度、不同吸附剂对流出曲线的影响,并求出LAS的孔扩散系数和液膜扩散系数.考察LAS和腐殖酸双组分溶液穿透时间及饱和分数的结果表明,腐殖酸为控制化合物,因此实际应用中只需要考虑腐殖酸的去除即可满足LAS的去除要求.

Experimental study on the effect of removing anion-surfactant from drinking water by adsorption process

Activated carbon, zeolite and diatomite was adopted as a sorbent to remove low-concentration LAS in supply water. Results of the static-state experiment indicated that significant removal was achieved by adsorption, and the effect was not influenced by temperature and pH in general conditions. But high-concentration organics, such as humic acid, produced negative effects on adsorption. The effect of different concentrations and sorbents on effluence-curve was examined, and the pore diffuse coefficient and liquid membrance diffuse coefficient were deduced. During the examination of bi-component solution's penetrating time and saturation fraction, humic acid was found as the key compound. That is to say, the consideration of humic acid removal is enough to meet the requirement of LAS removal.