摘要
分别用氢氧化钠、硫酸和稀土镧对粉煤灰进行改性,然后用对比法研究了粉煤灰改性前后对稀土氨氮废水的吸附行为。结果表明,碱改性粉煤灰对稀土氨氮废水的吸附效果最佳。在室温下,pH为11.7,投加量5g,吸附达到平衡时,碱改性粉煤灰的吸附效率可以达到81.56%。碱改性粉煤灰吸附稀土氨氮废水的吸附过程符合Elovich吸附方程,属于良性吸附,吸附容量达到1.72mg/g。
Fly ash was modified by sodium hydroxide, sulfuric acid, and lanthanum respectively. Adsorption behavior of fly ash on ammonia-nitrogen wastewater in rare earth before and after modification was studied by correlation method. The results show that alkali-modified fly ash has optimum adsorption effect. Equilibrium adsorption efficiency of alkali-modified fly ash at room temperature is 81.56% under the conditions including pH value of solution of 11.7, and dosage of fly ash of 5 g. Adsorption process of alkali-modified fly ash on ammonia-nitrogen wastewater conforms to Elovich Isothermal Adsorption Equation. The adsorption is benign with adsorption capacity of 1.72 mg/g.
作者
贾汉英
贺希格图
王继慧
吴锦绣
JIA Han-ying HE Xigetu WANG Ji-hui WU Jin-xiu(College of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China Key Laboratory of Inner Mongolia Autonomous University on New Technologies of Modern Metallurgy and Application of Rare Earth, Baotou 014010, Inner Mongolia, China Metallurgical and Ecological Engineering School, University of Science and , Technology Beijing, Beijing 100083, China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2017年第10期71-74,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
内蒙古自然科学基金资助项目(2017MS[LH]0208)
关键词
改性粉煤灰
氨氮废水
稀土
吸附
机理
modified fly ash
ammonia-nitrogen wastewater
rare earth
adsorption
mechanism
