Preparation and evaluation of bis(diallyl alkyl tertiary ammonium salt) polymer as a promising adsorbent for phosphorus removal

查看全文 作　　者：Zhengchi [1]Yang;Lihua [1,2,3,4]Liu;Lu [1]Zhao;Gang [1]Su;Zuoxiao [1]Wei;Anping [1,2,3,4]Tang;Jianrong [1,2,3,4]Xue

机构地区：[1]School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;[2]Key Laboratory of Theoretical Organic Chemistry and Function Molecule,Ministry of Education,Xiangtan 411201,China;[3]Himan Prouincial Key Laboratory of Controllable Preparation and Fimctional Application of Fine Polymers,Xiangtan 411201,China;[4]Hunan Province College Key Laboratory of QSAR/QSPR,Xiangtan 411201,China

出　　处：《Journal of Environmental Sciences》索引2019年第31卷第12期,共14页

基　　金：supported by the Scientific Research Fund of Hunan Education Department (No. 16A069);the National Nature Science Foundation of China (No. 51378201) 摘　　要：Problems associated with water eutrophication due to high phosphorus concentrations and related environmentally safe solutions have attracted wide attention.A novel bis(diallyl alkyl tertiary ammonium salt)polymer,particularly poly(N1,N1,N6,N6-tetraallylhexane-1,6-diammonium dichloride)(PTAHDADC),was synthesized and characterized by Fourier transform infrared spectroscopy,nuclear magnetic resonance,scanning electron microscopy,mercury intrusion method,and thermogravimetric analysis.The adsorption characteristics in phosphorus were evaluated in dilute solution,and the recycling properties of PTAHDADC were investigated.Results showed that PTAHDADC possessed macropores with a size distribution ranging from 30 to 130μm concentrating at 63μm in diameter and had 46.52%of porosity,excellent thermal stability below 530 K,and insolubility.PTAHDADC could effectively remove phosphorus at p H=7–11 and had a removal efficiency exceeding 98.4%at pH=10–11.The adsorption equilibrium data of PTAHDADC for phosphorus accorded well with the Langmuir and pseudo-second-order kinetic models.Maximum adsorption capacity was 52.82 mg/g at 293 K.PTAHDADC adsorbed phosphorus rapidly and reached equilibrium within 90 min.Calculated activation energy Eawas 15.18 k J/mol.PTAHDADC presented an excellent recyclability with only 8.23%loss of removal efficiency after five adsorption–desorption cycles.The morphology and structure of PTAHDADC slightly changed as evidenced by the pre-and post-adsorption of phosphorus,but the process was accompanied by the partial deprotonation of the(–CH2)3-NH+group of PTAHDADC.The adsorption was a spontaneous exothermic process driven by entropy through physisorption,electrostatic attraction,and ion exchange.Survey results showed that PTAHDADC was a highly efficient and fast-adsorbing phosphorus-removal material prospective in treating wastewater. 关键词：Bis(diallyl alkyl tertiary ammonium salt)polymer Phosphorus Adsorption thermodynamics Adsorption kinetics Removal mechanism

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Preparation and evaluation of bis(diallyl alkyl tertiary ammonium salt) polymer as a promising adsorbent for phosphorus removal

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