Study on preparation of magnetic Nano-adsorbent and its heavy metal enrichment performance

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhong, Shan^1^2 ; Li, Bolin^2

Office of Academic Affairs, Wuhan University of Technology, Wuhan, China^1

School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, China^2

关键词: Adsorption capacities;    Alkali resistance;    Beta-cyclodextrin;    Equilibrium adsorption;    Heavy metal enrichments;    Magnetic nanomaterials;    Removal of heavy metal ions;    Secondary pollution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/4/042068/pdf
DOI  :  10.1088/1755-1315/252/4/042068

来源: IOP

【 摘 要 】

In order to avoid the secondary pollution of adsorbent, the magnetic nanomaterials were modified by special groups to realize the rapid and efficient removal of heavy metal ions in wastewater and the recovery and reuse of adsorbent. On the carrier of Fe3O4 magnetic nanomaterials preparation of adsorbent Fe3O4@SiO2, carboxymethyl-β-cyclodextrins, and carries on the related research tests due to the conclusion: (1) the maximum adsorption capacity of Pb2 + and Cd2 + 67.75 mg/g and 27.56 mg/g, removal rate of 86.8% and 83.6%; (2) the optimal pH of the adsorbent is 5.5, the acid and alkali resistance is better and its resistance to alkali is better than the acid resistance; (3) the increase of ionic strength in solution reduces the equilibrium adsorption of adsorbent.