CAJ | 학술논문

研究了活性炭在不同浓度NaNO_3溶液中对硝基苯的吸附行为,着重考察活性炭对硝基苯的吸附规律.结果表明,活性炭对硝基苯的吸附量大、吸附速度快,其吸附动力学可以用Lagergren伪二级速率方程很好拟合,吸附过程是双速过程;活性炭对硝基苯的吸附等温线符合Langmuir 吸附等温式;不同浓度NaNO_3溶液,对活性炭吸附硝基苯有很大影响.吸附动力学和吸附等温线实验均表明在低浓度和高浓度的NaNO_3溶液中,活性炭对硝基苯的吸附量小于其在无NaNO_3溶液中对硝基苯的吸附量,而在中等浓度的NaNO_3溶液中,活性炭对硝基苯的吸附量大于其在无NaNO_3溶液中对硝基苯的吸附量.
연구료활성탄재불동농도NaNO_3용액중대초기분적흡부행위,착중고찰활성탄대초기분적흡부규률.결과표명,활성탄대초기분적흡부량대、흡부속도쾌,기흡부동역학가이용Lagergren위이급속솔방정흔호의합,흡부과정시쌍속과정;활성탄대초기분적흡부등온선부합Langmuir 흡부등온식;불동농도NaNO_3용액,대활성탄흡부초기분유흔대영향.흡부동역학화흡부등온선실험균표명재저농도화고농도적NaNO_3용액중,활성탄대초기분적흡부량소우기재무NaNO_3용액중대초기분적흡부량,이재중등농도적NaNO_3용액중,활성탄대초기분적흡부량대우기재무NaNO_3용액중대초기분적흡부량.
The adsorption behavior of activated carbon for nitrobenzene in various concentrations of NaNO_3 so-lutions was studied to investigate the law of nitrobenzene adsorption on active carbon. The results indicated that acti-vated carbon had great capacity and rapid speed for nitrobenzene adsorption. The process of adsorption was the two-speed process, and could be well described by pseudo second order model. The batch experiments data obeyed the Langmuir isotherm model, which indicated that the adsorption behavior was monolayer adsorption. The concentra-tions of NaNO_3 had significant impact on absorption capacity of active carbon, the capacity in low (0.001 mol/L) or high (0.100 mol/L) concentrations of NaNO_3 solutions was less than that in the solution without NaNO_3. In moder-ate concentration (0.010 mol/L) of NaNO_3 solution, however, the adsorption capacity was more than that in the so-lution without NaNO_3.