Characterization and physicochemical aspects of novel cellulose-based layered double hydroxide nanocomposite for removal of antimony and fluoride from aqueous solution  

作　　者：Hanen Bessaies Sidra Iftekhar Muhammad Bilal Asif Jamel Kheriji Chaker Necibi Mika Sillanpää Bechir Hamrouni 

机构地区：[1]Laboratory of Desalination and Water Treatment LR19ES01,Faculty of Sciences of Tunis,Tunis El Manar University,El Manar I 2092,Tunisia [2]Department of Environmental Engineering,University of Engineering and Technology Taxila,Taxila 47050,Pakistan [3]Department of Applied Physics,University of Eastern Finland,Kuopio 70210,Finland [4]A lnstitute of Environmental Engineering and Nano-Technology,Tsinghua Shezhen International Graduate School,Tsinghua University,Shenzhen 518055,China [5]International Water Research Institute,Mohammed VI Polythechnic University,Green City Ben Guerir 43150,Morocco [6]Institute of Research and Development,Duy Tan University,Da Nang 550000,Vietnam [7]Faculty of Environment and Chemical Engineering,Duy Tan University,Da Nang 550000,Vietnam [8]School of Civil Engineering and Surveying,Faculty of Health,Engineering and Sciences,University of Southern Queensland,West Street,Toowoomba,QLD 4350,Australia [9]Department of Chemical Engineering,School of Mining,Metallurgy and Chemical Engineering,University of Johannesburg,Doornfontein 2028,South Africa

出　　处：《Journal of Environmental Sciences》2021年第4期301-315,共15页环境科学学报（英文版）

摘　　要：A series of novel adsorbents composed of cellulose(CL)with Ca/Al layered double hydroxide(CC_(x)A;where x represent the Ca/Al molar ratio)were prepared for the adsorption of antimony(Sb(V))and fluoride(F^(-))ions from aqueous solutions.The CC_(x)A was characterized by Fourier-transform infrared spectroscopy(FTIR),Brunauer–Emmett–Teller(BET),elemental analysis(CHNS/O),thermogravimetric analysis(TGA-DTA),zeta potential,X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy with energy dispersive Xray spectroscopy(SEM-EDX)analysis.The effects of varying parameters such as dose,pH,contact time,temperature and initial concentration on the adsorption process were investigated.According to the obtained results,the adsorption processes were described by a pseudo-second-order kinetic model.Langmuir adsorption isotherm model provided the best fit for the experimental data and was used to describe isotherm constants.The maximum adsorption capacity was found to be 77.2 and 63.1 mg/g for Sb(V)and F^(-),respectively by CC_(3)A(experimental conditions:pH 5.5,time 60 min,dose 15 mg/10 mL,temperature 298 K).The CC_(3)A nanocomposite was able to reduce the Sb(V)and F^(-)ions concentration in synthetic solution to lower than 6μg/L and 1.5 mg/L,respectively,which are maximum contaminant levels of these elements in drinking water according to WHO guidelines.

关 键 词：Layered double hydroxide Adsorption Antimony removal Fluoride removal Kinetics 

分 类 号：TQ424[化学工程] TB332[一般工业技术—材料科学与工程] X52[环境科学与工程—环境工程]