CAJ | 학술논문

以煤质活性炭为吸附剂，选用邻苯二甲酸二丁酯（DBP）为吸附质，通过改变 DBP 的浓度（2~10 mg / L）、环境温度（25~35℃）以及吸附时间（2~12 h）进行平衡、动力学、热力学研究，并讨论了吸附剂投加量和溶液 pH 对吸附的影响。结果表明，吸附过程可以由 Langmuir 吸附等温线模型描述，理论吸附量达到了81.3 mg / g；吸附符合伪二级动力学模型；由热力学计算得出，自由能变ΔG 为负值，说明吸附过程是自发的；在一定范围内，增大投加量可以提高吸附效果；酸性及碱性条件下的吸附效果更佳。
이매질활성탄위흡부제，선용린분이갑산이정지（DBP）위흡부질，통과개변 DBP 적농도（2~10 mg / L）、배경온도（25~35℃）이급흡부시간（2~12 h）진행평형、동역학、열역학연구，병토론료흡부제투가량화용액 pH 대흡부적영향。결과표명，흡부과정가이유 Langmuir 흡부등온선모형묘술，이론흡부량체도료81.3 mg / g；흡부부합위이급동역학모형；유열역학계산득출，자유능변ΔG 위부치，설명흡부과정시자발적；재일정범위내，증대투가량가이제고흡부효과；산성급감성조건하적흡부효과경가。
In this study,coaly activated carbon was selected as absorbent,Di - n - butyl Phthalate (DBP)as absorbate. Equilibrium,kinetic and thermodynamic studies were investigated in aqueous solution with respect to initial DBP concentration(2 - 10 mg / L),temperature(25 - 35 ℃),and contact time(2 - 12 h). In the mean time,the impact of absorbent dosage and pH were discussed as well. Experimental results showed that the adsorption process can be described by Langmuir model with a theoretical absorbing capacity of 81. 3 mg / g. The absorption of DBP followed pseudo - second- order kinetics. In thermodynamic calculation,Gibbs’free energy turned out to be a negative val-ue,which means that the adsorption process was spontaneous. It was also found that the adsorption efficiency increased as the absorbent dosage increased within limits,and the absorption was more ef-ficient in acidic and alkaline conditions.