摘要
本文以藻渣为原材料制备磁性Fe_(3)O_(4)/Fe-藻渣碳基功能材料,及其对养殖废水中铜和锌的吸附效果。通过改变铜和锌模拟废水初始浓度、初始pH值、吸附时间、磁性Fe_(3)O_(4)/Fe-藻渣碳基功能材料投加量,得到最佳吸附条件,结合吸附动力学模型和吸附等温模型拟合参数,分析磁性Fe_(3)O_(4)/Fe-藻渣碳基功能材料对铜和锌的吸附性能和机理。当pH为5.0、磁性Fe_(3)O_(4)/Fe-藻渣碳基功能材料投加量为0.5 g/L时,对Cu^(2+)的去除率(99.88%)与吸附量(19.98 mg/g)均达到最大值;相同pH条件下,磁性Fe_(3)O_(4)/Fe-藻渣碳基功能材料投加量为1.5 g/L时,对Zn^(2+)的去除率(99.73%)达到最大值,此时吸附量为7.979 mg/g;当pH为6.0、藻渣碳基功能材料投加量为0.5 g/L时,对Zn^(2+)的吸附量(19.91 mg/g)达到最大值,此时去除率为82.98%。吸附动力学模型和吸附等温模型拟合参数显示,藻渣碳基功能材料吸附Cu^(2+)和Zn^(2+)的吸附过程更加符合准一级动力学方程和Freundlich模型,其吸附过程为物理作用主导的多分子层吸附。磁性Fe_(3)O_(4)/Fe-藻渣碳基功能材料吸附处理养殖废水中铜和锌的效果显著,可作为高效的吸附剂应用于养殖废水中重金属的去除。
To study the adsorption effect of magnetic Fe_(3)O_(4)/Fe-algae slag on copper and zinc in aquaculture wastewater.By changing the initial concentration,initial pH,adsorption time and the amount of magnetic Fe_(3)O_(4)/Fe-algae slag,the best adsorption conditions were obtained by changing the fitting parameters of copper and zinc adsorption in the simulated wastewater.When pH was 5.0,and the amount of magnetic Fe_(3)O_(4)/Fe-algae slag was 0.5 g/L,the removal rate of Cu^(2+)(99.88%)and the adsorption amount(19.98 mg/g)reached the maximum value;under the same pH conditions,when the amount of magnetic Fe_(3)O_(4)/Fe-algae slag carbon based functional material was 1.5 g/L,maximum removal rate of Zn^(2+)(99.73%).At this time,the adsorption capacity was 7.979 mg/g.When pH was 6.0,and the amount of carbon-based functional materials of algae slag was 0.5 g/L,adadsorption to Zn^(2+)(19.91 mg/g)reached the maximum,the removal rate at this time was 82.98%,the fitting parameters of the adsorption kinetic model and the adsorption isothermal model showed that the adsorption process of Cu^(2+)and Zn^(2+)by carbon-based functional materials of algae residue was more in line with the quasi-first-order kinetic equation and Freundlich model,and the adsorption process was a multi-molecular layer adsorption dominated by physical action.The magnetic Fe_(3)O_(4)/Fe-algae slag carbon-based functional material adsorption treatment of copper and zinc in aquaculture wastewater was remarkable,which could be used as an efficient adsorbent for the removal of heavy metals in aquaculture wastewater.
作者
孙春暖
吕强汝
赵健
邹海明
SUN Chunnuan;LYU Qiangru;ZHAO Jian;ZOU Haiming(College of Resources and Environment,Anhui Science and Technology University,Fengyang 233100,China)
出处
《安徽科技学院学报》
2025年第1期111-118,共8页
Journal of Anhui Science and Technology University
基金
安徽省自然科学基金面上项目(2008085ME169)。
