摘要
采用功率超声的新方法,研究了超声波功率、频率、声强、变幅杆直径、溶液初始pH值以及空化气体种类等因素对降解甲胺磷农药废水的影响.结果表明,甲胺磷的降解率与超声反应时间基本呈线性关系,具有一级反应动力学特征;低频范围内改变超声波频率对甲胺磷降解的影响很小;增大超声波功率、声强和变幅杆直径,甲胺磷降解率明显提高f25mm时可达61.7%;溶液初始pH值的影响显著,酸性条件有利于甲胺磷降解;充入空化气体对甲胺磷降解有利,其影响排序为空气>Ar>O2>N2.
A new method of ultrasonic irradiation was used to study the effects of such factors as ultrasonic power, ultrasonic frequency, ultrasonic intensity, probe diameter, initial pH value of solution and cavitating gases type on degradation of methamidophos pesticide wastewater. The results show that methamidophos degradation rate has basically linear relation with sonication time, possessing first-order kinetic feature; effect of ultrasonic frequency change on methamidophos degradation in low frequency ranges is very insignificant; with the increase of ultrasonic power, ultrasonic intensity and probe diameter, the degradation rate of methamidophos increase evidently, reaching 61.7% at f25mm; initial pH values of the solution exhibit significant influence and acidic condition is favorable for methamidophos degradation; the existence of cavitating gases is favorable for the degradation with its influence order of Air>Ar>O2 >N2.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2002年第3期210-213,共4页
China Environmental Science
关键词
超声降解
甲胺磷
农药废水
废水处理
methamidophos
pesticide wastewater
ultrasonic wave
degradation
cavitation effect
