發(fā)布時(shí)間：2018-08-27 19:37

【摘要】：近年來(lái),由于抗生素的過(guò)量使用和不適當(dāng)排放引起水體污染問(wèn)題,使人們對(duì)抗生素有效降解方法的探索也日益增多。選取了三種常見(jiàn)磺胺類抗生素,并以其中一種磺胺甲基嘧啶作為主要研究對(duì)象,考察了鐵炭微電解法對(duì)磺胺類抗生素的去除效果及反應(yīng)過(guò)程。首先,通過(guò)單因素試驗(yàn)得到了最佳反應(yīng)條件,即初始pH值為2、鐵炭填料填裝量為1 g/m L、溫度為25℃和曝氣量為60 L/h,在該條件下反應(yīng)8 h,對(duì)磺胺甲基嘧啶的去除率可達(dá)82.9%,對(duì)TOC的去除率達(dá)45.2%。其次,通過(guò)測(cè)定反應(yīng)中TOC、TN、NO_3~-、SO_4~(2-)、Fe~(2+)、Fe~(3+)的濃度變化趨勢(shì),揭示了鐵炭微電解法降解磺胺類抗生素的反應(yīng)途徑,即抗生素中的S—N鍵斷裂釋放出S、N原子,再經(jīng)過(guò)一系列的氧化還原作用得到進(jìn)一步去除。
[Abstract]:In recent years, the problem of water pollution caused by excessive use and improper discharge of antibiotics has led to the increasing exploration of effective degradation methods of antibiotics. Three common sulfonamides were selected and one of them was used as the main research object. The removal efficiency and reaction process of sulfanilamide antibiotics by iron-carbon microelectrolysis were investigated. First of all, the optimum reaction conditions are obtained by single factor test. That is, the initial pH value is 2, the filling capacity of iron and carbon filler is 1 g / mL, the temperature is 25 鈩，

本文編號(hào)：2208247