赤泥对废水中镍离子的吸附处理研究  

Characteristics of Nickel Ion Adsorption in Wastewater by Red Mud

作　　者：刘全忠[1] 蔡杨[1] 冯雪冬[1] 马艳飞[1] 

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255091

出　　处：《安徽农业科学》2015年第29期248-249,266,共3页Journal of Anhui Agricultural Sciences

基　　金：山东省自然科学基金项目(ZR2012DL05);山东省高等学校科技计划项目(J12LC51);山东理工大学青年发展计划项目(4072-114017);国家级大学生创新创业训练计划项目(20140433023)

摘　　要：[目的]研究赤泥吸附废水中镍离子的特性。[方法]采用静态吸附方法对赤泥吸附废水中镍离子的影响因素和特性进行研究。[结果]在反应温度为25℃,振荡时间为1.5 h条件下,向p H=6.7,50 mg/L含镍废水中投加2 g/L赤泥,镍离子去除率近90%。随着赤泥投加量、振荡时间以及p H增加,镍离子去除率逐渐增大。700℃焙烧赤泥较未经处理赤泥(原赤泥)的吸附能力略高。二级动力学方程可拟合赤泥吸附镍离子的过程,Langmuir模型较好地描述赤泥对镍离子的吸附热力学特性,最大饱和吸附量可达192.308 mg/g。赤泥吸附镍离子为吸热反应,并且为自发行为。[结论]该研究可为资源的可持续利用和重金属废水的处理提供思路和依据。[ Objective ] The research aimed to study characteristics of nickel ion adsorption in wastewater by red mud. [ Method ] The effect fac- tors and characteristics of nickel ion adsorption by red mud were studied by static adsorption method. [ Result] The removal rate is nearly 90% for nickel wastewater（ pH = 6.7,50 mg/L） under the conditions of 25 ℃, 1.5 h reaction time and 2 g/L red mud dosage. The increasing of red mud dosage, reaction time and pH results in the increasing of nickel ion removal rate. Adsorption capacity of 700 ℃ calcinated red mud is a little more than untreated red mud. The second-order kinetic equation can express the process of red mud adsorbing nickel ion. The adsorption isotherm ac- cords with Langmuir model,and the maximum adsorption amount reaches 192. 308 mg/g. Red mud adsorption of nickel ion is an endothermic re- action and spontaneous behavior. [ Conclusion ] The research could provide thinking and basis for sustainable utilization of resource and processing of heavy metals wastewater.

关 键 词：赤泥 镍离子 吸附 LANGMUIR模型 

分 类 号：S181[农业科学—农业基础科学]