(中南大學 冶金科學與工程學院，長沙 410083)
摘 要: 將顆粒活性炭碾磨處理后用于吸附乳酸鈉，并采用單因子實驗考察溶液pH值、溫度對活性炭吸附量的影響。對吸附等溫線的分析表明，碾磨時間不同的活性炭對乳酸鈉的吸附行為均可用Freundlich方程描述，對比吸附常數和固相−水分配系數發(fā)現，碾磨30 min后活性炭的吸附能力最強；碾磨活性炭吸附乳酸鈉的最佳pH為7.0，且吸附量受溫度的影響不大。
關鍵字: 顆粒活性炭；乳酸鈉；碾磨；吸附
modified active carbon and its characteristics
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Four kinds of milled granule active carbons were used to adsorb sodium lactate through batch experiments. The adsorption isothermal curve, pH value of solution, and temperature were studied using one-factor experiment. The adsorption isotherms were analyzed. The results show that with the regression analysis of data, the adsorption behaviors of sodium lactate can be well described by Freundlich equation. The adsorption constant and distribution coefficient show that the adsorption capacity of granular active carbon(GAC) milled for 30 min is the strongest, the best pH value is 7.0, and the effect of temperature on adsorption capacity is little.
Key words: granular active carbon; sodium lactate; mill; adsorption
