摘要
采用高炉渣对Zn(Ⅱ)进行震荡吸附实验,研究了Zn(Ⅱ)初始浓度、高炉渣投加量、接触时间、温度和溶液的初始p H对Zn(Ⅱ)吸附效果的影响。结果表明,在常温(28℃)、高炉渣粒径为100目、振荡频率为120 r/min、高炉渣吸附剂投加量为8 g/L、接触时间为60 min、废水初始p H=7和浓度为10 mg/L的条件下,Zn(Ⅱ)去除率可达到98.6%,废水中的Zn(Ⅱ)浓度由10 mg/L降至0.14 mg/L,符合国家污水综合排放标准(GB8978-1996)的一级标准。通过吸附动力学和吸附等温线实验得出,高炉渣吸附Zn(Ⅱ)的吸附曲线符合Langmuir等温式和伪二级动力学方程式。
Blast furnace slag was used for the shock adsorption tests to zinc ion. The influence of initial concentration of zinc ion,blast furnace slag dosage,contact time,temperature and initial p H of solution on adsorption effect of zinc ion was investigated in this study. The results showed that the removal rate of zinc ion in the normal atmospheric temperature（ 28℃）,particle of blast furnace slag was 100 mesh,oscillation frequency was 120 r /min,blast furnace slag dosage was 8 g / L,contact time was 60 min,wastewater initial p H value was 7 and initial concentration was 10 mg / L,could reach 98. 6%,the concentrate of zinc ion in wastewater reduced from 10 mg / L to 0. 14 mg / L,and conformed to the primary standard of National Integrated Wastewater Discharge Standard（ GB8978-1996）. Through the experiments of adsorption kinetics and adsorption isotherm,it was concluded that the adsorption curve of blast furnace slag for zinc ion fitted with Langmuir isotherm and pseudo-second-order equation.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第10期5065-5070,共6页
Chinese Journal of Environmental Engineering
关键词
高炉渣
吸附
Zn(Ⅱ)
吸附等温线
吸附动力学
blast furnace slag
adsorption
zinc ion
adsorption isotherm
adsorption kinetics
