本文關(guān)鍵詞： 氰化廢水 煤基電吸附材料 電吸附 電壓　出處：《稀有金屬》2017年08期 　論文類型：期刊論文

【摘要】：以自制的煤基電極材料為陰陽極,采用電吸附技術(shù)處理氰化廢水,主要研究了外加電壓對(duì)電吸附處理氰化提金廢水的影響,測(cè)定了煤基電極材料的循環(huán)伏安曲線,并用掃描電子顯微鏡(SEM)、能譜分析(EDS)對(duì)吸附后的電極片進(jìn)行分析表征。研究表明,外加電壓對(duì)電吸附過程的影響顯著,外加電壓越大,離子的去除率越大。開路狀態(tài)下僅發(fā)生離子的吸附現(xiàn)象,反應(yīng)5 h后銅離子和總氰的去除率為14.60%,10.50%;當(dāng)外加電壓為0.4 V時(shí),各離子在電場(chǎng)作用下發(fā)生定向遷移,富集于電極的雙電層上,該過程主要發(fā)生離子的定向遷移及電吸附現(xiàn)象,各離子吸附順序依次為Cu(CN)3-4,Zn(CN)2-4,Cu(CN)2-3,CN-,SCN-,5 h后銅離子和總氰的去除率為19.93%,22.53%;當(dāng)外加電壓2.0 V時(shí),溶液中離子在定向遷移、電吸附與富集沉淀的共同作用下,5 h后銅離子及總氰的去除率可達(dá)到88.49%,75.17%,在此過程中陽極附近產(chǎn)生硫氰酸銅等絮狀沉淀物。
[Abstract]:The electroadsorption technology was used to treat cyanide wastewater with self-made coal-based electrode material as cathode and anode. The effect of applied voltage on electroadsorption treatment of cyanide wastewater was studied. The cyclic voltammetry curves of coal-based electrode materials were measured. The adsorbed electrodes were characterized by scanning electron microscopy (SEM) and energy spectrum analysis (EDS). The effect of applied voltage on the electrosorption process is significant. The larger the applied voltage, the greater the ion removal rate. After 5 h reaction, the removal rate of copper ion and total cyanide was 14.60% and 10.50%. When the applied voltage is 0.4 V, the ions migrate in the direction under the action of the electric field, which is enriched on the double layer of the electrode. This process mainly occurs the directional migration of ions and the phenomenon of electrosorption. The order of ion adsorption is CuCCNN (3-4) ZnN (CZN) 2-4CU (CU) 2-3 (CN-N-) and SCN- (鈪，

本文編號(hào)：1490250