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| 1 | Synthesis of novel adsorbent by intercalation of biopolymer in LDH for the removal of arsenic from synthetic and natural water显示文摘This study focuses on the synthesis of nanocomposites named CCA and CZA that were prepared by the incorporation of cellulose(CL)in the Ca/Al and Zn/Al layered double hydroxide(LDH),respectively.These materials were then used for the uptake of As(Ⅲ)and As(V)from aqueous medium.Characterization of both nanocomposites(CCA and CZA)was done using FTIR and Raman analysis to identify the functional groups,N2 adsorption-desorption isotherms to determine the specific surface area and pore geometry and XPS analysis to obtain the surface atomic composition.Some other characters were investigated using simultaneous TGA and DTA and elemental chemical analysis(CHNS/O).The crystallinity of the prepared nanocomposites was displayed by XRD patterns.Furthermore,the sheet-like structure of the LDHs and the irregularity of surface morphology with porous structure were observed by TEM and SEM microphotographs.Optimization of maximum adsorption capacity was adjusted using different parameters including pH,contact time and adsorbent dosage.The pseudo-second-order model was in good fitting with kinetics results.The adsorption isotherm results showed that CZA exhibits better adsorption capacity for As(Ⅲ)than CCA and the Langmuir isotherm model described the data well for both nanocomposites.Thermodynamic studies illustrated the endothermic nature of CCA and exothermic nature on CZA,as well as the fact that the adsorption process is spontaneous.A real water sample collected from well located in Gabes(Tunisia),has also been treated.The obtained experimental results were confirmed that these sorbents are efficient for the treatment of hazardous toxic species such as. | Hanen Bessaies Sidra Iftekhar Bhairavi Doshi Jamel Kheriji Mohamed Chaker Ncibi Varsha Srivastava Mika Sillanpaa Bechir Hamrouni | 2020 | Journal of Environmental Sciences2020，32，5： | 10 |
| 2 | Characterization and physicochemical aspects of novel cellulose-based layered double hydroxide nanocomposite for removal of antimony and fluoride from aqueous solution显示文摘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. | Hanen Bessaies Sidra Iftekhar Muhammad Bilal Asif Jamel Kheriji Chaker Necibi Mika Sillanpää Bechir Hamrouni | 2021 | Journal of Environmental Sciences2021，33，4： | 4 |
| 3 | Effect of Si content on magnetic properties and intersublattice exchange interactions in GdFe11-xSix Ti compounds 显示文摘 | Djega-Mariadassou C Bessais L | 2001 | J Magn Magn Mater2001，，： | 1 |
| 4 | Bruggeman effective medium approach for modelling optical properties of porous silicon:Comparison with experiment显示文摘 | Khardani M Bouaicha M Bessais B | | 0，，06： | 1 |
| 5 | Comparison of 25 and 50microgram of misoprostol for induction of labor in nulliparous women with postdate pregnancy in Port Harcourt显示文摘 | Azubuike IJ Bessay G Okpani A | 2015 | Niger J Clin Pract2015，18，2： | 1 |
| 6 | Effect of Si Content on Magnetic Properties and Intersublattice Exchange Interactions in GdFe11-xSixTi compounds显示文摘 | Cizmas C B Djega-Mariadassou C Bessais L | 2001 | J Magn Magn Mater2001，226，： | 1 |
| 7 | Transformation of amorphous iron oxide films pre - deposited by spray pyrolysis into FeS2 - pyrite films 显示文摘 | Bessais B Ouertani B Ouerfelli J | 2005 | Materials Letters2005，59，： | 1 |
| 8 | Einsatz der Sonographie bei der implantation 显示文摘 | Damon V B Bessai K Gregor J | 2001 | Zentralbl Gynakol2001，123，6： | 1 |
| 9 | X-ray and mossbauer studies of Sm2 Fe17-x Crx materials synthesized by mechanical alloying followed by an appropriate short annealing显示文摘 | Nehdi I Bessais L Djega-Mariadassou C | 2003 | J Alloys Comp2003，351，： | 1 |
| 10 | Enhancement of coercivity in the nanocomposite R40Fe30Co15 Al10B5 (R = Nd,Pr)显示文摘 | Sab S Bessais L Djega-Mariadassou C | 2003 | J Phys:Condens Matter2003，15，32： | 1 |
| 11 | Einsatz der sonographie bei der implantation显示文摘 | Damon VB Bessai K Gregor J | 2001 | Zentralbl Gynakol2001，123，6： | 1 |
| 12 | Transvaginal cervicoisth- mic cerclage as an alternative to the transabdominal technique 显示文摘 | Golfier F Bessai K Paparel P | 2001 | Obstet Gynecol Reprod Biol2001，100，1： | 1 |
| 13 | Emergence of order in nano- crystalline SmFe9显示文摘 | Djega-Mariadassou C Bessais L | 2000 | JomTaal of Magnetism and Magnetic Mate- rials2000，210，： | 1 |
| 14 | Effect of Si content on magnetic properties and intersublattice exchange interactions in GdFe11- xSix Ti compounds显示文摘 | CIZMAS C B DJEGA-MARIADASSOU C BESSAIS L | 2001 | J Magn Magn Mater2001，，： | 1 |
| 15 | Enhanced photocatalytic activities of silicon nanowires/graphene oxide nanocomposite:Effect of etching parameters显示文摘Homogeneous and vertically aligned silicon nanowires(SiNWs)were successfully fabricated using silver assisted chemical etching technique.The prepared samples were characterized using scanning electron microscopy,transmission electron microscopy and atomic force microscopy.Photocatalytic degradation properties of graphene oxide(GO)modified SiNWs have been investigated.We found that the SiNWs morphology depends on etching time and etchant composition.The SiNWs length could be tuned from 1 to 42μm,respectively when varying the etching time from 5 to 30 min.The etchant concentration was found to accelerate the etching process;doubling the concentrations increases the length of the SiNWs by a factor of two for fixed etching time.Changes in bundle morphology were also studied as function of etching parameters.The SiNWs diameter was found to be independent of etching time or etchant composition while the size of the SiNWs bundle increases with increasing etching time and etchant concentration.The addition of GO was found to improve significantly the photocatalytic activity of SiNWs.A strong correlation between etching parameters and photocatalysis efficiency has been observed,mainly for SiNWs prepared at optimum etching time and etchant concentrations of 10 min and 4:1:8.A degradation of92%was obtained which further improved to 96%by addition of hydrogen peroxide.Only degradation efficiency of 16%and 31%has been observed for bare Si and GO/bare Si samples respectively.The obtained results demonstrate that the developed SiNWs/GO composite exhibits excellent photocatalytic performance and could be used as potential platform for the degradation of organic pollutants. | Mounir Gaidi Kais Daoudi Soumya Columbus Anouar Hajjaji My Ali El Khakani Brahim Bessais | 2021 | Journal of Environmental Sciences2021，33，3： | 1 |
| 16 | Transformation of amorphous iron oxide films pre - deposited by spray pyrolysis into FeS2 - pyrite films显示文摘 | Bessais B Ouertani B Ouerfelli J | 2005 | Materials Letters2005，6，： | 1 |
| 17 | Screen-printed tin-doped indium oxide films for low temperature and fast response methanol gas sensing 显示文摘 | MBAREK H SAADOUN M BESSAIS B | 2008 | Sensor Letters2008，6，4： | 1 |
| 18 | Transformation of amorphous iron oxide films pre-deposited by spray pyrolysis into FeS2-pyrite films显示文摘 | BESSAIS B OUERTANI B OUERFELLI J | 2005 | Materials Letters2005，6，： | 1 |
| 19 | Emergence of order in nanocrystalline SmFe9 显示文摘 | Djega- Mariadassou C Bessais L | 2000 | Journal of Magnetism and Magnetic Materials2000，210，13： | 1 |
| 20 | Einsatz der sonog raphie bei der implantation显示文摘 | Damon VB Bessai K Gregor J | 2001 | Zentralbl Gynakol2001，123，6： | 1 |
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