http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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,Karri, Rama Rao Elsevier 2019 Journal of Environmental Management Vol.231 No.-
<P><B>Abstract</B></P> <P>With the rapid growth of industrialization, water bodies are polluted with heavy metals and toxic pollutants. In pursuit of removal of toxic pollutants from the aqueous environment, researchers have been developed many techniques. Among these techniques, magnetic separation has caught research attention, as this approach has shown excellent performance in the removal of toxic pollutants from aqueous solutions. However, magnetic graphene oxide based nanocomposites (MGO) possess unique physicochemical properties including excellent magnetic characteristics, high specific surface area, surface active sites, high chemical stability, tunable shape and size, and the ease with which they can be modified or functionalized. As results of their multi-functional properties, affordability, and magnetic separation capability, MGO's have been widely used in the removal of heavy metals, radionuclides and organic dyes from the aqueous environment, and are currently attracting much attention. This paper provides insights into preparation strategies and approaches of MGO's utilization for the removal of pollutants for sustainable water purification. It also reviews the preparation of magnetic graphene oxide nanocomposites and primary characterization instruments required for the evaluation of structural, chemical and physical functionalities of synthesized magnetic graphene oxide nanocomposites. Finally, we summarized some research challenges to accelerate the synthesized MGO's as adsorbents for the treatment of water pollutants such as toxic and radioactive metal ions and organic and agricultural pollutants.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Recent status of the synthetic magnetic adsorbents applications for water-purification. </LI> <LI> Preparation strategies of magnetic graphene oxide (MGO) nanocomposites. </LI> <LI> MGO's nanocomposites characterization strategies are well reviewed. </LI> <LI> Extensively reviews the status and approaches of MGO's for the removal of pollutants. </LI> <LI> Highlighted the future prospective and advantages of the MGO's at conclusions. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Lingamdinne, Lakshmi Prasanna,Koduru, Janardhan Reddy,Chang, Yoon-Young,Karri, Rama Rao Elsevier 2018 Journal of molecular liquids Vol.250 No.-
<P><B>Abstract</B></P> <P>The presence of toxic heavy metals such as Pb(II) in aqueous environments is causing adverse health risks to human beings, motivating researchers to develop efficient techniques to remove pollutants from potable and effluent water. Adsorption was found to be an efficient technique among the various pollutant removal techniques. Efficiency of the adsorption process depends on the adsorbent and its nature. In this regard, a synthesized nickel ferrite-reduced graphene oxide (NFRGO) nano-composite is developed and utilized as an adsorbent to remove heavy metal ions. Since the performance of the adsorption technique depends on independent process variables, the influence of parameters such as the initial solution concentration, adsorbent dosage, and contact residence time on the removal of Pb(II) by NFRGO using a batch adsorption process are systematically studied in this work. Based on the design of experiments approach and central composite design (CCD), twenty experimental runs are performed with each process variable segregated in the experimental range. The optimal values of the independent process variables to achieve maximum removal efficiency are examined using conventional response surface methodology (RSM). A quadratic model, which consists of a first-order and second-order degree regressive model is developed using the analysis of variance (ANOVA) and RSM - CCD framework. Based on the desirability index, the optimum values were found to be an initial concentration of 18.38mg/L, an adsorbent dose of 0.55g/L, and a contact residence time of 83min in order to achieve 99% removal of Pb(II) ions with 0.953 desirability.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel synthesized nickel ferrite-reduced graphene oxide (NFRGO) nano-composite is developed. </LI> <LI> Differential evolution approach as an efficient evolutionary optimization technique for optimal parameters. </LI> <LI> Design of experiments done using response surface methodology-central composite design framework </LI> <LI> Optimized characteristic constants representing mechanisms in isotherms models </LI> </UL> </P>
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>