CAJ | 학술논문

坡缕石造粒改性、酸改性后，研究改性坡缕石吸附Pb （Ⅱ）的等温吸附特征、pH值和温度对吸附的影响、热力学特征及动力学特征．Langmuir、Freundlich等温式拟合，Langmuir拟合效果较好．在试验条件下，在pH＞4时，改性坡缕石吸附Pb效果良好；且随温度的升高，吸附效果先升增强后降低，在20℃出现拐点；吸附符合准二级动力学模型；热力学分析显示，改性坡缕石吸附Pb反应为放热反应且能自发进行且为焓驱动．在温度为20℃， pH＝4时，改性坡缕石吸附Pb的Qm 为65.324 mg/g ．
파루석조립개성、산개성후，연구개성파루석흡부Pb （Ⅱ）적등온흡부특정、pH치화온도대흡부적영향、열역학특정급동역학특정．Langmuir、Freundlich등온식의합，Langmuir의합효과교호．재시험조건하，재pH＞4시，개성파루석흡부Pb효과량호；차수온도적승고，흡부효과선승증강후강저，재20℃출현괴점；흡부부합준이급동역학모형；열역학분석현시，개성파루석흡부Pb반응위방열반응차능자발진행차위함구동．재온도위20℃， pH＝4시，개성파루석흡부Pb적Qm 위65.324 mg/g ．
After making granulation and acid modification to palygorskite ,the isothermal adsorption char-acteristics ,the influences made by pH and temperature ,the thermodynamic characteristics and the dynam-ic characteristics for modified palygorskite have been studied in this paper .With the Langmuir and Freun-dlich isotherm fitting ,the result of the Langmuir is better .Under the conditions of experiment ,the effect of adsorption for Pb by modified Playgorskite is good in the pH > 4 ;with temperature increasing ,the effect of adsorption is increasing firstly and then decreasing ,showing the inflection point at 20 ℃ ;the process of adsorption is in accordance with pseudo-second-order kinetic equation ;the result of thermody-namic analysis show s that the adsorption process for Pb is exothermic ,spontaneous and is driven by en-thalpy .When the temperature is 20 ℃ and the pH=4 ,the amount of Pb adsorption on the modified play-gorskite is 65 .324 mg/g .