【摘要】 为探究低浓度表面活性剂对沉积物稳定性及总氮的释放影响,通过吸管法和振荡再悬浮研究了两类表面活性剂SDBS和Tween-80对沉积物稳定性及总氮释放的影响。结果表明:在低浓度表面活性剂下,沉积物溶液稳定性增强,随着浓度升高,溶液稳定性逐渐降低。且Tween-80对沉积物颗粒稳定性的影响要强于SDBS。低浓度表面活性剂的加入使沉积物中TN的释放量增大;随着浓度升高,TN的释放量逐渐减少。因此低浓度表面活性剂更有利于沉积物中TN的释放,加剧了水体内源污染。更多还原

【Abstract】 The research was conducted to study the effects of two types of surfactants,including SDBS and Tween-80,on the stability of sediments and total nitrogen releasing rule by pipette technique and sediments re-suspension. The results showed that the stability of solutions was enhanced at the low concentation of surfactants,and their stability was gradually decreased while the concentration of solutions increased. What’s more,the impact of Tween-80 on the stability of sediment particles was stronger than that of SDBS. A lower concentration of surfactant was beneficial to release more total nitrogen in sentiments,and the emission of total nitrogen decreased with the increase of concentration. The low concentration of surfactants were more conducive to the release of total nitrogen in sediments,which further aggravated the water pollution.更多还原