超声波对底泥中腐殖酸的分解作用

针对超声波对污染底泥中腐殖酸的作用,研究超声波作用时间、作用功率、底泥水土质量比、腐殖酸初始质量分数等影响因素对超声波作用下腐殖酸的分解规律。结果表明:超声波可以促进底泥中腐殖酸的分解,被分解的腐殖酸主要是土颗粒结合态的腐殖酸。超声作用会促进孔隙水中腐殖酸质量分数的增加,但随着超声波的继续作用,孔隙水中的腐殖酸会逐渐被分解。在一定的超声波功率范围内,超声波功率对腐殖酸的分解影响不明显,泥浆的水土质量比越大对底泥中腐殖酸的去除越有利。在实际工程应用中应以小功率、长时间、高水土质量比的超声条件组合才能取得较好的效果。

Decomposition of humic acid in dredged sediment under ultrasound treatment

In order to examine the effect of ultrasound on the humic acid(HA) in dredged sediment,the factors of ultrasound action time,power,water to soil mass ratio,and initial HA content in the decomposition properties of HA were studied.Test results showed that ultrasound could expedite decomposition of the HA in sediment,and the decomposed parts were mainly bound by soil particles.The HA content in pore water increased,at first,under ultrasound treatment,but it decreased as the ultrasound treatment continued due ...