摘要
以改性沸石/羟基氧化铁复合材料作为吸附剂,通过静态吸附实验,研究了不同因素影响下复合材料对废水中亚甲基蓝的吸附性能。研究结果表明:改性沸石/羟基氧化铁复合材料对亚甲基蓝有很好的去除效果,当废水pH值为13.0,吸附平衡时间为20min时,向电解质(NaNO3)浓度为0.01mol/L的含亚甲基蓝50mg/L的废水中投加5g/L改性沸石/羟基氧化铁复合材料,亚甲基蓝去除率达到94.65%。Langmuir型方程比Freundlich型方程对等温吸附实验数据拟合效果更好,D-R方程分析表明,该吸附以物理吸附为主。分别用拟一级、拟二级动力学方程和颗粒内扩散模型对吸附动力学过程进行拟合。结果表明,拟二级动力学方程对实验数据拟合效果较好,扩散过程以膜扩散为主。
Using zeolite/ferric hydroxide composite as adsorbent, we study the adsorption of composite materials on methylene blue wastewater under different factors in the static adsorption experiment. The results show that the removal of zeolite / ferric hydroxide composite to methylene Blue is good, when pH value is 13.0,adsorption equilibrium time is 20rain, the concentration of methylene blue is 50mg/L, the dosage of zeolite / ferric hydroxide composite materials is 5g/L, the removal rate of methylene blue can reach 94.65 % Langmuir adsorption equation can describe the adsorption isotherms experiment data better than Freundlich adsorption equation and the analysis of D-R equation suggests that this adsorption is mainly by physical ones. Using pseudo-first order equation,.pseudo-second order equation and Particle diffusion modelfor process fitting, Results showed that pseudo-second order equation can describe experimental data well and the diffusion process dominated by membrane diffusion.
出处
《能源环境保护》
2013年第5期34-40,共7页
Energy Environmental Protection
关键词
改性沸石
羟基氧化铁复合材料
亚甲基蓝
吸附
动力学方程
吸附等温线
Modified zeolite/ferric hydroxide composite
methylene blue
adsorption
kinetic equation
adsorption isotherm
