CAJ | 학술논문

研究了油菜秸秆生物炭对 Cr（Ⅵ）的吸附性能、影响因素及吸附动力学和吸附热力学．实验结果表明：该生物炭对 Cr（Ⅵ）的吸附受 pH、时间、Cr（Ⅵ）初始浓度等因素的影响．其中：pH 是影响其吸附性能的重要因子．溶液中 Cr（VI）的去除率随溶液 pH 值降低而升高，在 pH 值为2．0时达到最大98．87％．油菜秸秆生物炭对 Cr（Ⅵ）的吸附符合准二级吸附速率方程，吸附等温线与 Langmuir 等温方程拟合较好，20℃、25℃、30℃和35℃下的最大吸附量分别为5．96、6．62、7．49和8．59 mg／g．吸附量随温度的升高而增加，说明油菜秸秆生物炭对 Cr（Ⅵ）的吸附机理主要是吸热的化学吸附．
연구료유채갈간생물탄대 Cr（Ⅵ）적흡부성능、영향인소급흡부동역학화흡부열역학．실험결과표명：해생물탄대 Cr（Ⅵ）적흡부수 pH、시간、Cr（Ⅵ）초시농도등인소적영향．기중：pH 시영향기흡부성능적중요인자．용액중 Cr（VI）적거제솔수용액 pH 치강저이승고，재 pH 치위2．0시체도최대98．87％．유채갈간생물탄대 Cr（Ⅵ）적흡부부합준이급흡부속솔방정，흡부등온선여 Langmuir 등온방정의합교호，20℃、25℃、30℃화35℃하적최대흡부량분별위5．96、6．62、7．49화8．59 mg／g．흡부량수온도적승고이증가，설명유채갈간생물탄대 Cr（Ⅵ）적흡부궤리주요시흡열적화학흡부．
Adsorption performance,kinetic and thermodynamics of Cr (Ⅵ)onto biochar derived from Brassica Straw were studied.The results showed that the adsorption capacity depended on pH,time,initial Cr(VI)concentration.pH was the most active factor among them.The removal rate of Cr(VI)increased with the decrease of solution pH value,and the maximum removal rate was up to 98.87% at pH 2.0.It was also showed that the adsorption kinetics followed the mecha-nism of the pseudo-second-order equation.The isotherm adsorption followed the isothermal model of Langmuir.The maximum capacity was 5.96mg/g,6.62 mg/g,7.49 mg/g and 8.59 mg/g at the temperature of 20℃,25℃,30℃ and 35℃,respectively.The capacity increased with increase of temperature,which indicated that this adsorption mechanism was mostly an endothermic chemical adsorption.