CAJ | 학술논문

利用工业废弃物钛白石膏作为吸附剂，研究了其对重金属Pb(II)的吸附特性。采用BET、XRD、SEM对钛白石膏进行了表征，研究了介质pH值、温度、接触时间、投加量以及离子强度对Pb(II)在钛白石膏上吸附特性的影响。结果表明，钛白石膏对Pb(II)的吸附速率较快，在70 min时就达到吸附平衡，去除率达到99.8%。升高温度和增大吸附剂的投加量，均有助于去除率的提高，表明该吸附过程为吸热反应，最适宜pH值为5.7左右。吸附动力学特征更符合准二级动力学模型，Langmuir等温模型可较好的拟合钛白石膏吸附Pb(II)的等温过程。
이용공업폐기물태백석고작위흡부제，연구료기대중금속Pb(II)적흡부특성。채용BET、XRD、SEM대태백석고진행료표정，연구료개질pH치、온도、접촉시간、투가량이급리자강도대Pb(II)재태백석고상흡부특성적영향。결과표명，태백석고대Pb(II)적흡부속솔교쾌，재70 min시취체도흡부평형，거제솔체도99.8%。승고온도화증대흡부제적투가량，균유조우거제솔적제고，표명해흡부과정위흡열반응，최괄의pH치위5.7좌우。흡부동역학특정경부합준이급동역학모형，Langmuir등온모형가교호적의합태백석고흡부Pb(II)적등온과정。
The industrial waste titanium gypsum was used as a adsorbent to study adsorption characteristics of Pb(II), which was characterized by BET speciifc surface area, scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques. In this paper, The effects of initial pH value adsorbent dosage, contact time, temperature and ionic strength were investigated. The adsorption of Pb(II) on titanium gypsum is a quick process and reach equilibrium at 70 min, the removal rate is 99.8%. The removal rate increasing with the increasing of temperature and adsorbent dosage, The optimal pH value is about 5.7. The Adsorption data was well iftted the Langmuir isotherm model and the pseudo second-order kinetics model, the adsorption is a endothermic process.