Abstract:

The pretreatment of methamidophos pesticide wastewater has been carried through by acidification- Fenton oxidation process. The results show that during the acidification reaction， and under the following conditions: the pH is 2， and reaction temperature 100 ℃， the removal rates of TOC and sulfide can reach 18.33% and 90.7% respectively. In the process of Fenton oxidation reaction， and when pH is 4， n（H₂O₂）∶n（Fe²⁺）is 30∶1， and a dosage of 3.0% ofH₂O₂， the removal rate of TOC can reach 24.3%. When 20% of Ca（OH）₂ emulsion is added， and the pH is between 11 to 12， most of the inorganic phosphorus in the Fenton oxidized wastewater can be removed.

Key words: methamidophos pesticide wastewater, acidification, Fenton oxidation

摘要：

采用酸解-Fenton氧化对甲胺磷废水进行预处理试验,研究结果表明:在酸解反应过程中,在pH为2,反应温度100℃的条件下,TOC和硫化物的去除率分别达18.33%和90.7%;在Fenton氧化反应过程中,在pH为4,n(H₂O₂)∶n(Fe²⁺)=30∶1,H₂O₂投加体积分数为3.0%的条件下,TOC去除率达24.3%;投加20%Ca(OH)₂乳液,pH为11~12时,可将Fenton氧化后的废水中绝大部分的无机磷除去。

关键词: 甲胺磷废水, 酸解, Fenton氧化

CLC Number: 

• X703.1