CAJ | 학술논문

采用扫描电镜(SEM)、X 射线能谱仪(EDS)、比表面和孔隙度分析仪等设备,研究了由生物除铁除锰滤柱反冲洗铁锰生物污泥制得的铁锰氧化物的表征性状,并结合等温吸附-解吸和动力学实验研究对铁锰氧化物吸附磷的吸附特性和相关机制进行探究.结果表明：供试铁锰氧化物是球形颗粒聚合体,孔隙发达且多以微孔形式存在,比表面积为285.6m2/g.铁锰氧化物的磷吸附特性可用 Langmuir 方程和Freundlich 方程来描述,相关系数均大于0.9,达到极显著水平,吸附容量为39.06mg/g.中性盐介质(KNO3)中在最大吸附量时 P 的解吸率为13.04%.铁锰氧化物对磷的吸附焓变△H0为正值,是吸热过程,吉布斯自由能变△G0为负值,该吸附过程是自发进行的.准二级动力学模型可较好地反映供试铁锰氧化物的等温吸附动力学.
채용소묘전경(SEM)、X 사선능보의(EDS)、비표면화공극도분석의등설비,연구료유생물제철제맹려주반충세철맹생물오니제득적철맹양화물적표정성상,병결합등온흡부-해흡화동역학실험연구대철맹양화물흡부린적흡부특성화상관궤제진행탐구.결과표명：공시철맹양화물시구형과립취합체,공극발체차다이미공형식존재,비표면적위285.6m2/g.철맹양화물적린흡부특성가용 Langmuir 방정화Freundlich 방정래묘술,상관계수균대우0.9,체도겁현저수평,흡부용량위39.06mg/g.중성염개질(KNO3)중재최대흡부량시 P 적해흡솔위13.04%.철맹양화물대린적흡부함변△H0위정치,시흡열과정,길포사자유능변△G0위부치,해흡부과정시자발진행적.준이급동역학모형가교호지반영공시철맹양화물적등온흡부동역학.
The biogenic iron and manganese oxide applied were gained by backwashing from the biological iron and manganese removal filter columns. The research reported in this paper focused on its characteristics and adsorption-desorption properties on phosphorous. The results indicated that the oxide was spherical particle polymer with a developed pore structure mostly in the form of micropore, with a specific surface area of 285.6m2/g. The adsorption isotherm could be well described by Langmuir equation and Freundlich equation with a correlation coefficient larger than 0.9 and a high adsorption capacity of 39.06mg/g. The desorption percentage of adsorbed phosphorus was 13.04%in a neutral electrolyte of KNO3 under maximum phosphorous adsorption conditions. The adsorption enthalpy change △H0 was positive, which indicated the adsorption process was endothermic, meanwhile the minus Gibbs free energy change△G0 suggested it was spontaneous. It was found that the phosphorous adsorption kinetics fitted pseudo-second-order kinetic models.