Application of Synthetic Iron Oxyhydroxide with Influencing Factors for Removal of As(Ⅴ) and As(Ⅲ) from Groundwater  

作　　者：Shakeel Ahmed Talpur Muhammad Yousuf Jat Baloch Chunli Su Javed Iqbal Aziz Ahmed Hafeez Ahmed Talpur 

机构地区：[1]School of Environmental Studies,China University of Geosciences,Wuhan 430078,China [2]DiSPUTer,Department of Psychological,Health and Territory Sciences,University“G.d′Annunzio”Chieti-Pescara,66100 Chieti,Italy [3]College of New Energy and Environment,Jilin University,Changchun 130021,China [4]School of Plant,Environment and Soil Sciences,Louisiana State University Agricultural Centre,Baton Rouge LA 70803,USA [5]Department od Engineering and Geology,University“G.d′Annunzio”Chieti-Pescara,66100 Chieti,Italy

出　　处：《Journal of Earth Science》2024年第3期998-1009,共12页地球科学学刊（英文版）

基　　金：funded by the National Natural Science Foundation of China(Nos.42177078 and 42020104005).

摘　　要：Synthesized iron oxyhydroxide was applied for the adsorptive removal of As(V)and As(III)from the aquas media.Additionally,this investigation highlighted the synergistic effect of calcium carbonate in conjunction with iron oxyhydroxide,resulting in enhanced removal efficiency.The experiment was conducted under various conditions:concentration,dosage,pH,agitation,and temperature.Material characterizations such as Brunauer Emmett Teller,X-ray diffraction,scanning electron microscopy,and Fourier transform infrared spectroscopy were implied to understand adsorption mechanisms.The Langmuir model revealed optimal concentrations for As(V)=500μg/L at pH-5 and As(III)=200μg/L at pH-7,resulting in 95%and 93%adsorption efficiencies,respectively.Maximum adsorption capacities“qm”were found to be 1266.943μg/g for As(V)and 1080.241μg/g for As(III).Freundlich model demonstrated favorable adsorption by indicating“n>1”such as As(V)=2.542 and As(III)=2.707;similarly,the speciation factor“RL<1”for both species as As(V)=0.1 and As(III)=0.5,respectively.The kinetic study presented a pseudo-second-order model as best fitted,indicating throughout chemisorption processes for removing As(V)and As(III).Furthermore,incorporating calcium carbonate presented a significant leap in the removal efficiency,indicating As(V)from 95%to 98%and As(III)from 93%to 96%,respectively.Our findings offer profound motivation for developing effective and sustainable solutions to tackle arsenic contamination,underscoring the exceptional promise of iron oxyhydroxide in conjunction with calcium carbonate to achieve maximum removal efficiency.

关 键 词：adsorption ARSENIC AS(V) AS(III) iron oxyhydroxide isotherms kinetics groundwater. 

分 类 号：O64[理学—物理化学]