Fabrication of recyclable Fe^(3+) chelated aminated polypropylene fiber for efficient clean-up of phosphate wastewater  

作　　者：Shangyuan Zhao Fangjia Wang Rui Zhou Peisen Liu Qizhong Xiong Weifeng Zhang Chaochun Zhang Gang Xu Xinxin Ye Hongjian Gao 

机构地区：[1]Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention,Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green Phosphorus Fertilizer of Anhui Province,College of Resources and Environment,Anhui Agricultural University,Hefei 230036,China [2]Key Laboratory of JiangHuai Arable Land Resources Protection and Eco-restoration,Ministry of Natural Resources,College of Resources and Environment,Anhui Agricultural University,Hefei 230036,China [3]Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第7期840-852,共13页化学科学与工程前沿（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant No.22208003);Natural Science Foundation of Anhui Province(No.1908085QB87);Major Science and Technology Projects in Anhui Province(No.202103a06020012).

摘　　要：Herein,a Fe^(3+)-loaded aminated polypropylene fiber has been reported as an efficient phosphate adsorbent.The remarkable phosphate removal ability of the fiber is due to Fe^(3+)immobilization,and it demonstrates a maximum adsorption capacity of 33.94 mg·P·g^(–1).Adsorption experiments showed that the fiber is applicable over a wide pH range from 2 to 9.Furthermore,the adsorption kinetics and isotherm data were consistent with the pseudo-second-order and Langmuir adsorption models,respectively.The adsorption equilibrium of the fiber for phosphate was reached within 60 min,indicating an efficient monolayer chemisorption process.Moreover,the adsorbent maintained prominent phosphate removal in the presence of competitive ions such as NO_(3)^(–)and Cl^(–),exhibiting high selectivity.More importantly,the fiber demonstrated excellent reusability(5 times)and low adsorption limit below 0.02 mg·P·g^(–1).In addition,the phosphate removal efficiency of the fiber can exceed 99%under continuous flow conditions.The adsorption mechanism was studied by X-ray photoelectron spectroscopy,showing that the adsorption of phosphate on the fiber mainly depended on the chemical adsorption of the modified Fe^(3+).Overall,this study proves that the fiber possesses many advantages for phosphate removal,including high adsorption efficiency,lower treatment limit,good recyclability,and environmental friendliness.

关 键 词：phosphate adsorption aminated polypropylene fiber Fe^(3+) ligand exchange REUSABILITY 

分 类 号：O64[理学—物理化学]