CAJ | 학술논문

采用硝酸预氧化焦粉、氯化锌化学活化法制备了焦粉基碳吸附材料.考察了焦粉基碳吸附材料对水中铜(Ⅱ)离子的吸附特性.实验结果表明,焦粉基碳吸附材料吸附平衡时间90 min,该吸附过程符合Langmuir型吸附模型;不同温度下的ΔH~θ＞0、ΔG~θ＜0,证实其吸附过程是一个自发吸热过程;ΔS~θ＞0,表明铜离子在固液界面有序性减小、混乱度增大.对实验数据进行数学模型拟合,二级相关系数R~2=0.999 1,显示吸附过程动力学与二级动力学模型相关性较好.
채용초산예양화초분、록화자화학활화법제비료초분기탄흡부재료.고찰료초분기탄흡부재료대수중동(Ⅱ)리자적흡부특성.실험결과표명,초분기탄흡부재료흡부평형시간90 min,해흡부과정부합Langmuir형흡부모형;불동온도하적ΔH~θ＞0、ΔG~θ＜0,증실기흡부과정시일개자발흡열과정;ΔS~θ＞0,표명동리자재고액계면유서성감소、혼란도증대.대실험수거진행수학모형의합,이급상관계수R~2=0.999 1,현시흡부과정동역학여이급동역학모형상관성교호.
Coke-based carbon absorption material was prepared by nitric acid pre-oxidation of coke powder followed by zinc chloride chemical activation. The absorption characteristics were studied for the coke-based carbon absorbing copper ions in water. The results show that the absorption equilibrium time was 90 min, and the absorption accorded with the Langmuir model. In addition,the results of ΔH~θ＞0, ΔG~θ＜0 at different temperatures reveal that the adsorption was a spontaneous endothermic process, and that ΔS~θ＞0 indicates that the order reduced and the chaos increased for the copper ion adsorption the solid-liquid interface. Finally, the experimental data were fitted to second order kinetics model and the correlation coefficient(R~2) was 0.9991, suggesting that the adsorption followed second order kinetics.