摘要
制备了磁性纳米复合吸附剂PAM@Fe3O4/MnO2(PFM),用于含铜废水的吸附实验研究,考察了吸附剂投加量、重金属溶液初始浓度、吸附时间等因素对吸附效果的影响。实验结果表明:磁性纳米复合吸附剂PFM可有效去除水中的铜离子,在Cu2+浓度为50 mg/L,pH为6.0,吸附剂量为1.6 g/L的条件下,在400 min达到吸附平衡,吸附容量可达到30.29 mg/g,Cu2+去除率可达到97%。吸附-再生循环实验证实PFM具有良好的再生性能,在去除Cu2+方面具有很好的实际应用前景。VSM分析表明:纳米PFM具备超顺磁性和铁磁性的优势;PFM的XRD图谱显示,PAM附着于纳米Fe3O4/MnO2表面,增强了其与溶液中金属离子接触的表面积,有利于对金属离子的吸附;在纳米PFM吸附剂的FTIR中出现PAM中的酰胺键,印证了Fe3O4/MnO2与PAM成功制备为磁性纳米复合吸附剂PFM。
A novel magnetic composite adsorbent of PAM@Fe3O4/MnO2(PFM)was prepared and introduced to remove copper ions from water.The effects of adsorbent dosage,initial concentration of the heavy metal solution,and the adsorption time for the Cu2+removal were investigated.The experimental results showed that the magnetic composite adsorbent of PFM could effectively remove copper ions from water.Under the conditions of Cu2+concentration of 50 mg/L,pH of 6.0,and adsorbent dosage of 1.6 g/L,the adsorption equilibrium was gained within 400 min.The adsorption capacity could reach 30.29 mg/g and the removal rate of Cu2+was as high as 97%then.Adsorption-regeneration cycles confirmed that the adsorbent could be reused successfully for Cu2+adsorption and had promising potential for practical application.The VSM analysis showed that PFM had the advantages of superparamagnetism and ferromagnetism.The XRD pattern indicated that PAM adhered to the surface of nano-Fe3O4/MnO2,which enhanced the surface area of contact with metal ions in solution and would be beneficial to the adsorption of metal ions.The amide bonds that appeared in the FTIR spectra analysis indicated that magnetic composite adsorbent was successfully prepared by Fe3O4/MnO2 and PAM.
作者
李静
鲍东杰
王向宁
刘占孟
LI Jing;BAO Dong-jie;WANG Xiang-ning;LIU Zhan-meng(Xingtai Polytechnic College,Xingtai 054035,China;School of Civil Engineering and Architecture,East China Jiao Tong University,Nanchang 330013,China)
出处
《环境工程》
CAS
CSCD
北大核心
2020年第5期84-88,共5页
Environmental Engineering
基金
国家自然科学基金(51468016)
河北省科技支撑计划(15273628)
河北省高等学校科学研究计划青年基金(QN20131178)
河北省“三三三”人才培养工程资助经费项目。
