活性炭负载钴–过硫酸盐氧化处理含酚废水的研究

Study on Oxidation Treatment of Phenol-Containing Wastewater with Activated Carbon Supported Cobalt-Persulfate

摘要: 酚类是一种高毒性的有机物，对人类健康和生态环境都产生了极大的危害，其在氧化反应中产生的中间产物也具有高毒性且难处理、成分复杂、废水量大、色度大，因此有必要对酚类物质的降解进行分析研究。本研究选择活性炭(AC)做载体。通过活性炭负载钴离子，进一步提高过硫酸盐的活性，用X射线分析仪(XRD)，扫描电子显微镜(SEM)对活性炭负载钴进行表征分析。通过实验研究钴负载量、活性炭负载钴的投加量、过硫酸钠的投加量、反应时间、反应温度、废水的pH以及废水初始浓度对含酚废水降解效果的影响。结果表明，当钴负载量为6%、活性炭负载钴用量为1.2 g/L、过硫酸钠用量为0.9 g/L、反应时间为100 min、反应温度为50℃、废水的pH为3、废水初始浓度为90 mg/L时，COD的去除率可达95.98%，有可实际操作的意义。

Abstract: Phenols are highly toxic organic compounds that pose great harm to human health and the eco-logical environment. The intermediate products produced during oxidation reactions are also highly toxic and difficult to treat, with complex components, large amounts of wastewater, and high chromaticity. Therefore, it is necessary to analyze and study the degradation of phenolic substances. This study selects activated carbon (AC) as the carrier. The activity of persulfate was further improved by loading cobalt ion on activated carbon. The cobalt loaded on activated carbon was characterized and analyzed by X-ray analyzer (XRD) and Scanning electron microscope (SEM) The effects of cobalt loading, cobalt loading on activated carbon, Sodium persulfate, reaction time, reaction temperature, pH of wastewater and initial concentration of wastewater on the degradation of phenol containing wastewater were studied through experiments. The results showed that when the cobalt loading was 6%, the cobalt loading on activated carbon was 1.2 g/L, the Sodium persulfate was 0.9 g/L, the reaction time was 100 min, the reaction temperature was 50˚C, the pH of wastewater was 3, and the initial concentration of wastewater was 90 mg/L, the COD removal rate could reach 95.98%, which was of practical significance.