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Lanthanum doped-Graphene OxideNanocomposites for Groundwater Remediation
( Lingamdinne ),( Koduru Janardhan Reddy ),최종수,최유림,장윤영,양재규 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Fe<sub>3</sub>O<sub>4</sub>/GO, magnetic reduced GO, Mn<sub>3</sub>O<sub>4</sub>/GO, NiFe<sub>2</sub>O<sub>4</sub>/GO and other hybrid nanocomposites have been used for the adsorption of various organic and inorganic pollutants from water.Lanthanide oxides have similar properties like transition metal(III) oxides and have good chemical durability and low phonon energy. Recently, lanthanum(III) (La(III)) composites was utilized for selective removal of phosphorus and the resultant studies conclude that the La(III) is superior than to Fe(III) or Al(III) in the pH range of 4.5-8.5. Hence, in the present study, prepared hybrid composites (La(III)-GO)were utilized groundwater remediation. Thephysicochemical properties of the prepared compositeswereanalyzed using XRD, XPS, FT-IR and FT-Raman analyses. The surface area and morphology of La-GO were studied using SEM-EDX and BET analysis. The surface composition and morphology studies conclude that the prepared La-GO were a smart hybrid for favorable adsorption of arsenic.
1P-629 Lanthanides-Graphene Oxide Hybrids are Samrat Nanocomposites for Groundwater Remediation
( Lingamdinne ),최종수,최유림,장윤영,양재규,( Koduru Janardhan Reddy ) 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
We synthesized Lanthanides-Graphene Oxide (LGO), such as La(III)-GO and Gd(III)-GO nanocomposites for the adsorptive removal of arsenic from groundwater. LGO composites were well characterized using XRD, XPS, FT-IR and FT-Raman. The surface area and morphology of LGO were studied using SEM-EDX and BET analysis. The spectral characterization studies proved the purity of compound. The surface composition and morphology studies results conclude that the prepared LGO were a smart hybrid for favorable adsorption of arsenic. Subsequently as prepared LGO was applied for adsorptive removal of arsenic. The adsorption studies found that the arsenic adsorption onto LGO was achieved more than 90%. The overall results conclude that as prepared LGO can be successfully apply for removal of arsenic from real ground water.
( Lingamdinne ),( Janardhan Reddy Koduru ),최종수,최유림,장윤영,양재규 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Manganese Ferrite Sugar based Graphene Oxide Lanthanum (MFSGOLa) was applied as an adsorbent for the removal of Arsenic(V) from waste-water. The physico-chemical characterization of MFSGOLa was analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The effects of dosage, pH, contact time, and concentration on the adsorption of Arsenic(V) onto MFSGOLa were studied. The kinetic study demonstrated that the adsorption of Arsenic(V) onto MFSGOLa well fitted to the pseudo-second-order model. The MFSGOLa was found to be a potential adsorbent for the removal of Arsenic(V) from an aqueous solution.
Lingamdinne, Lakshmi Prasanna,Koduru, Janardhan Reddy,Chang, Yoon-Young,Kang, Seon-Hong,Yang, Jae-Kyu Elsevier 2019 Journal of molecular liquids Vol.279 No.-
<P><B>Abstract</B></P> <P>In this work, the surface of graphene oxide was functionalized with lanthanum to produce porous flowered graphene oxide‑lanthanum fluoride (GO-LaF) nanocomposite for adsorptive removal of As(V) from aqueous system. GO-LaF nanocomposite was characterized by TEM, SEM, XRD, and XPS analysis. Maximum adsorption capacity for As(V) was 18.52 mg g<SUP>−1</SUP> (at 298 K) and was dependent on the solution pH, adsorbent mass, contact time and As(V) concentration. Pseudo-second-order kinetic model provided excellent kinetic data fitting. The isotherm data were well-fitted to the Langmuir equation. Adsorption results obtained at different conditions suggest that As(V) adsorption onto GO-LaF occurs through mixed processes such as electrostatic, ion-exchange, and surface complexation. Electrostatic interactions were predominantly involved in the adsorption process at low pH while surface complexation and/or ion-exchange were predominantly involved above neutral pH.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Spectral studies confirmed the synthesis of graphene oxide‑lanthanum fluoride (GO-LaF). </LI> <LI> Characterization results conferred flowered mesoporous nano-sized GO-LaF. </LI> <LI> Arsenate adsorption was rate-controlled monolayer adsorption on homogeneous GO-LaF. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Lingamdinne, L.P.,Chang, Y.Y.,Yang, J.K.,Singh, J.,Choi, E.H.,Shiratani, M.,Koduru, J.R.,Attri, P. Elsevier 2017 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.307 No.-
The accumulation of heavy metal ions in living cells impairs the organ function of living creatures. So, needs to develop new materials with high efficiency of heavy metals removal from the environment. As part of this effort, here, synthesized magnetic inverse spinel iron oxide nanoparticles (MISFNPs) using a biogenic methodology. To synthesize the biogenic MISFNPs, we used the seed extract of Cnidiummonnieri (L.) Cuss (CLC) as a precursor. The prepared MISFNPs was characterized using PXRD, FT-IR, SEM-EDX, SEM, BET, AFM and XPS. We also investigated the size, surface area, structure and magnetic properties of MISFNPs. Additionally, magnetic property measurement system (MPMS) studies show that our prepared MISFNPs was superparamagnetic at room temperature. Further, we used the MISFNPs for the removal of Pb(II) and Cr(III) from aqueous solutions through batch studies. Batch adsorption studies revealed that Pb(II) and Cr(III) follow pseudo-second-order kinetics during adsorption onto the homogenous surface of MISFNPs. Besides, we also found that the adsorption of Pb(II) and Cr(III) on nanoparticles followed an endothermic process. Lastly, we concluded that MISFNPs synthesized by a green route is capable of recycling and removal of heavy metals without loss of its stability.
Influencing factors on sorption of TNT and RDX using rice husk biochar
Lingamdinne, Lakshmi Prasanna,Roh, Hoon,Choi, Yu-Lim,Koduru, Janardhan Reddy,Yang, Jae-Kyu,Chang, Yoon-Young Elsevier 2015 Journal of industrial and engineering chemistry Vol.32 No.-
<P><B>Abstract</B></P> <P>2,4,6-Trinitrotoluene (TNT) and 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX) are the most commonly used nitro-organic explosives in contemporary military munitions, and readily be introduced into the environment, especially in groundwater supplies. In the present study, rice husk biochar (RHBC) prepared by pyrolysis at 700°C was used for the treatment of TNT and RDX in waste water by batch sorption. The prepared RHBC chemical and physical characteristics were well characterized using analytical spectroscopic techniques. In order to develop the sorption mechanism of TNT and RDX onto RHBC, the factors influencing sorption were studied. The results demonstrated that TNT and RDX sorption depended on the pH value of the aqueous solution, and decreased as pH increased from 2.0 to 6.0 and was attributed with their p<I>K</I>a<SUB>1</SUB> values along with their physical and chemical characteristics. The batch sorption results revealed that the sorption of the two explosives onto RHBC was rate limiting monolayer chemisorptions on homogeneous surface. These results suggested that the sorption of TNT and RDX occurs through weak electrostatic interactions as well as through charge transfer between –NO<SUB>2</SUB> and ππ electrons of explosives and RHBC surface functional groups.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Characterized rice husk biochar (RHBC) prepared at various pyrolysis temperatures. </LI> <LI> Sorption characteristics of TNT and RDX onto RHBC were well studied. </LI> <LI> Well explained the pH influenced sorption mechanism of TNT and RDX onto RHBC. </LI> <LI> Sorption mechanism of explosives explained with spectral evidence. </LI> <LI> Sorption of TNT and RDX on to RHBC occurs to through complex mechanism. </LI> </UL> </P>