CAJ | 학술논문

采用水蒸气活化法制备得到微孔发达的椰壳活性炭，并研究其对肌酐的吸附性能。以850℃活化所得微孔率最高的活性炭为吸附剂，考察了活性炭投加量、吸附时间、溶液 pH 值及肌酐初始质量浓度对肌酐吸附性能的影响，并采用准一级、准二级动力学方程对实验数据进行拟合处理。结果表明，制备所得4种椰壳活性炭对肌酐均有较强的吸附能力；微孔率越高，吸附量越大；37℃下，椰壳活性炭对肌酐的吸附平衡时间为6 h，平衡吸附量达到97.88 mg/ g；酸性环境更有利于肌酐吸附；平衡吸附量随肌酐初始质量浓度增加而升高；吸附过程符合准二级动力学模型，以化学吸附为主。
채용수증기활화법제비득도미공발체적야각활성탄，병연구기대기항적흡부성능。이850℃활화소득미공솔최고적활성탄위흡부제，고찰료활성탄투가량、흡부시간、용액 pH 치급기항초시질량농도대기항흡부성능적영향，병채용준일급、준이급동역학방정대실험수거진행의합처리。결과표명，제비소득4충야각활성탄대기항균유교강적흡부능력；미공솔월고，흡부량월대；37℃하，야각활성탄대기항적흡부평형시간위6 h，평형흡부량체도97.88 mg/ g；산성배경경유리우기항흡부；평형흡부량수기항초시질량농도증가이승고；흡부과정부합준이급동역학모형，이화학흡부위주。
Activated carbons with abundant micropores were prepared from coconut shell by steam activa-tion and the relationship between pore structure and adsorption characteristics for creatinine was dis-cussed. Meanwhile,the adsorption properties to creatinine of coconut-shell activated carbon( which was activated at 850 ℃ )were studied,including activated carbon dosage,contact time,pH and initial solution concentration. To study the adsorption kinetics,the pseudo-first order and the pseudo-second order models were selected to fit the experimental data,and the equilibrium data were analyzed by the adsorption iso-therms of Langmuir and Freundlich. The results showed that the activated carbon exhibited excellent ad-sorption performance to creatinine,and the adsorption quantity increased as the increase of BET surface and micropore ratio. Moreover,the adsorption equilibrium was reached within 6 h at 37 ℃ and its equilib-rium adsorption capacity was 97. 88 mg / g,the adsorption capacity was better than that on basic condition, and the adsorption quantity increased with the rise of initial concentration of creatinine. The kinetic data was fitted well by pseudo-second order equation,which suggested that the adsorption of creatinine was a chemisorption process.