The polydopamine-coated magnetic platanus fruit fiber adsorbents (PDA@CoFe2O4-PFs) were synthesized by a two-step approach.The as-synthesized materials were characterized and analyzed by SEM,TG/DTA,XRD,FT-IR,VSM and water contact angle analyzer,respectively.More specifically,the performance of the adsorbents was investigated by taking Safranine T (ST) as the target pollutant,and the effects of CoFe2O4 loading ratio,solution pH,adsorbent dosage and contact time on the adsorption performance were explored.The adsorption data were fitted and analyzed using adsorption kinetic model and adsorption isotherm model.The experimental results revealed that PDA@CoFe2O4-PFs had good hydrophilicity and magnetism,which could realize the adsorption and removal of ST from wastewater and the rapid separation of the adsorbent from the solution under the action of an applied magnetic field.The theoretical maximum adsorption capacity of the product reached up to 54.32mg/g when 35mg of adsorbent with CoFe2O4 of 20% loading ratio was added to the ST solution at pH 8.0.The adsorption process fitted well to the pseudo-second-order model and the Langmuir model,indicating that the adsorption was a single molecular layer chemisorption.
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基金资助
国家自然科学基金(22202016);陕西基础科学研究院(化学、生物学)基础科学研究计划青年项目(22JHQ006);中央高校基本科研业务费资助项目(300102293204);长安大学国际教育教学改革项目(300108231136)
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