本文關(guān)鍵詞：硝酸鎘污染高嶺土電化學(xué)特性試驗研究　出處：《科學(xué)技術(shù)與工程》2016年31期 　論文類型：期刊論文

  更多相關(guān)文章： 硝酸鎘 高嶺土 電化學(xué)阻抗譜 時間常數(shù) 等效電路

【摘要】：通過對不同含量硝酸鎘的高嶺土進行電化學(xué)阻抗譜進行測試,結(jié)合其Nyquist和Bode圖譜模擬出相應(yīng)的等效電路參數(shù)。分析結(jié)果表明,在污染6 h時,隨著硝酸鎘濃度增加,高嶺土Nyquist圖中呈現(xiàn)出由準Randle向非Randle變化,溶液電阻減小、常相位角元件電容增大、以及擴散阻抗逐漸減小至消失;在污染24 h時,高嶺土Nyquist圖中呈現(xiàn)出兩個時間參數(shù),電化學(xué)參數(shù)溶液電阻、常相位角元件、固液界面電阻、擴散阻抗均有所改變;隨著時間的推移,高嶺土與孔隙溶液硝酸鎘電離出的Cd2+產(chǎn)生較強的電化學(xué)作用,高嶺土體系密實度增大吸附性增強。
[Abstract]:The electrochemical impedance spectra of kaolin with different contents of cadmium nitrate were measured and the corresponding equivalent circuit parameters were simulated by combining the Nyquist and Bode spectra. The results showed that the corresponding equivalent circuit parameters were obtained. At 6 h of pollution, with the increase of cadmium nitrate concentration, the Nyquist diagram of kaolin changed from quasi Randle to non Randle, the resistance of solution decreased and the capacitance of constant phase angle element increased. And the diffusion impedance gradually decreased to disappear; At 24 h of pollution, the Nyquist diagram of kaolin presents two time parameters, the electrochemical parameters, the solution resistance, the constant phase angle element, the solid-liquid interface resistance and the diffusion impedance. With the passage of time, the Cd2 produced by cadmium nitrate ionization of kaolin and pore solution produced a strong electrochemical action, and the density of kaolin system increased and the adsorbability of kaolinite system increased.
【作者單位】： 太原理工大學(xué)建筑與土木工程學(xué)院;
【基金】：國家自然科學(xué)基金(51208333) 山西省自然科學(xué)基金(2014011036-1,2014131019,01T2015)資助
【分類號】：TU41
【正文快照】： 山西省自然科學(xué)基金(2014011036-1,2014131019,01T2015)資助高嶺土是一種非金屬的黏土礦物,在我國儲量豐富,普遍存在于廣東、陜西、福建、江西等地。在工業(yè)生產(chǎn)方面,高嶺土可作為添合劑廣泛應(yīng)用于造紙、陶瓷、橡膠、涂料等方面,是我國重要的工業(yè)礦產(chǎn)資源[1—3]。在對高嶺土的，

本文編號：1416954