超声空化降解水中头孢克圬的研究

利用超声波辐射头孢克圬模拟废水,对比了单独超声空化效应以及向溶液中添加适量CCl4以强化超声空化效应两种条件下对溶液中头孢克圬的去除情况。实验结果表明,两种情况下溶液中头孢克圬的COD均有下降,可生化性得到明显提高,不过单独超声空化效应降解耗时较长,CCl4强化超声空化效应耗时短,降解效果较为明显。

超声波降解吡啶溶液

In this paper,the effects of irradiation time,original concentration of pyridine solution,and pH on the degradation efficiency of pyridine were studied.The results show that the longer the sonication time is,the greater the degradation efficiency of pyridine solution;the degradation efficiency of pyridine solution decreases linearly with the increase of the original solution concentration;the pH of the solution played an important role,and there is a good degradation efficiency at pH≥68;the conductivity and the degradation efficiency have the same variational trend.

超声波在药用植物提取中的应用研究

为了综合开发利用我国丰富的药用植物资源,研究者们正积极探索各种有效的提取技术。与传统的提取技术相比,超声提取法由于超声波固有的多种物理和声化学效应而得到广泛应用。目前,如何把超声波技术的研究成果推广到提取药用植物功能因子的工业生产已成为研究的热点。该文主要介绍了超声波空化作用,超声波强化萃取的机理,以及超声波技术在强化萃取中的应用现状,并概述了近年来超声波技术在天然药用植物提取方面的研究进展。

油砂超声波除油试验研究

文章主要讨论了超声波清洗和搅拌清洗在油砂清洗中的应用 ,通过试验分析了不同清洗方法在不同清洗条件下的油砂清洗情况。研究表明 ,在超声空化作用下 ,4 0℃左右超声振动 3min ,其净洗率可达 98%以上 ,而搅拌清洗仅达 6 5 % ;在油砂比值低于 18%情况下 ,油砂配制比值的大小对超声空化 (4 0℃以上 )净洗率的大小影响很小 。

超声波在油砂分离中的应用

以自制的碱液油砂清洗剂,在超声波下对内蒙古扎赉特旗油砂进行分离。考察了超声频率、超声声强、清洗时间和清洗温度对油砂分离的影响。在超声空化作用下,超声频率为28 kHz,超声声强为7.06 W/cm2,剂和砂质量比为0.8,体系温度为60℃,清洗时间13.0 min的条件下,其出油率可达到94%,结果表明,超声波作用大大提高了油砂的出油率。

超声技术在无机材料合成与制备中的应用分析

随着科学技术的发展,超声技术作为一门高新技术在化工、医药等领域逐渐展现做出其独一无二的作用。在化工领域,声化学在无机材料合成与制备方面扮演着非常重要的角色,通过研究超声技术对于无机高分子材料、纳米材料及其他新型材料的制备有很重要的意义,本文从超声波和超声技术的概念出发,通过研究超声空化作用的基本原理及其效用,总结了超声空化作用在无机材料合成与制备中的应用。

Ultrasonic vibrations and coal permeability: Laboratory experimental investigations and numerical simulations

Ultrasonic vibrations in coal lead to cavitation bubble oscillation, growth, shrinkage, and collapse, and the strong vibration of cavitation bubbles not only makes coal pores break and cracks propagate, but plays an important role in enhancing the permeability of coal. In this paper, the influence of ultrasonic cavitation on coal and the effects of the sonic waves on crack generation, propagation, connection, as well as the effect of cracks on the coal permeability, are studied. The experimental results show that cracks in coal are generated even connected rapidly after ultrasonic cavitation. Under the effect of ultrasonic cavitation,the permeability increases between 30% and 60%, and the number of cracks in coal also significantly increased. Numerical experiments show that the effective sound pressure is beneficial to fracture propagation and connection, and it is closely related to the permeability. Moreover, the numerical simulations and physical experiments provide a guide for the coal permeability improvement.

Time difference based measurement of ultrasonic cavitations in wastewater treatment

Intensity of cavitation is significant in ultrasonic wastewater treatment,but is complicated to measure.A time difference based method of ultrasonic cavitation measurement is proposed.The time differences at different powers of 495 kHz ultrasonic are measured in experiment in comparison with conductimetric method.Simulation results show that time difference and electrical conductivity are both approximately positive proportional to the ultrasonic power.The degradation of PNP solution verifies the availability in wastewater treatment by using ultrasonic.