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RISS 인기검색어
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- 저자 : Kuppusamy Thavamani (검색결과 4 건)
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Kuppusamy, Saranya,Thavamani, Palanisami,Venkateswarlu, Kadiyala,Lee, Yong Bok,Naidu, Ravi,Megharaj, Mallavarapu Pergamon Press 2017 Chemosphere Vol.168 No.-
<P><B>Abstract</B></P> <P>For more than a decade, the primary focus of environmental experts has been to adopt risk-based management approaches to cleanup PAH polluted sites that pose potentially destructive ecological consequences. This focus had led to the development of several physical, chemical, thermal and biological technologies that are widely implementable. Established remedial options available for treating PAH contaminated soils are incineration, thermal conduction, solvent extraction/soil washing, chemical oxidation, bioaugmentation, biostimulation, phytoremediation, composting/biopiles and bioreactors. Integrating physico-chemical and biological technologies is also widely practiced for better cleanup of PAH contaminated soils. Electrokinetic remediation, vermiremediation and biocatalyst assisted remediation are still at the development stage. Though several treatment methods to remediate PAH polluted soils currently exist, a comprehensive overview of all the available remediation technologies to date is necessary so that the right technology for field-level success is chosen. The objective of this review is to provide a critical overview in this respect, focusing only on the treatment options available for field soils and ignoring the spiked ones. The authors also propose the development of novel multifunctional green and sustainable systems like mixed cell culture system, biosurfactant flushing, transgenic approaches and nanoremediation in order to overcome the existing soil- contaminant- and microbial-associated technological limitations in tackling high molecular weight PAHs. The ultimate objective is to ensure the successful remediation of long-term PAH contaminated soils.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Summary of the extent and status of global PAHs contamination in soil. </LI> <LI> Overview of established remediation approaches for PAHs and their costs. </LI> <LI> Indication of emerging options for the cleanup of PAHs polluted sites. </LI> <LI> Proposal of novel multifunctional green and sustainable cleanup systems for future. </LI> <LI> Focus only on the treatment of field soils and not spiked soils. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Kuppusamy, Saranya,Venkateswarlu, Kadiyala,Thavamani, Palanisami,Lee, Yong Bok,Naidu, Ravi,Megharaj, Mallavarapu Elsevier 2017 Ecological engineering Vol.101 No.-
<P><B>Abstract</B></P> <P>Oak acorn peel (OP) was used in natural form for the removal of cationic dyes, methylene blue (MB), acridine orange (AO) and malachite green (MG) from aqueous solutions. OP removed 60–97% of 600mgL<SUP>−1</SUP> dyes at wide ranging pH (2–10). Adsorption equilibriums were attained within 3h. Sorbent (5gL<SUP>−1</SUP>) adsorption capacity was 109.43, 115.92 and 111.85mgg<SUP>−1</SUP> for MB, AO and MG, respectively. Adsorption kinetics was described using pseudo-second-order model. Equilibrium adsorption data were interpreted by Langmuir and Freundlich isotherms. Dye removal was by coagulation-coupled adsorption. Coagulation was due to the formation of complexes between the dye molecules and OP polyphenols that led to the deposition of precipitated flocs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Oak acorn peel (OP) effectively removed cationic dyes by biosorption. </LI> <LI> Dye removal by OP was not influenced by temperature. </LI> <LI> Pseudo-second-order kinetic, Langmuir and Freundlich isotherm models were fitted. </LI> <LI> Mechanism of dye removal was by coagulation-coupled adsorption process. </LI> <LI> OP rapidly removed the dyes from artificially spiked wastewater. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Saranya Kuppusamy,Palanisami Thavamani,Mallavarapu Megharaj,Kadiyala Venkateswarlu,이용복,Ravi Naidu 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
The potential of dried twigs of Melaleuca diosmifolia as a novel biosorbent for removing three cationicdyes, methylene blue (MB), acridine orange (AO) and malachite green (MG), and an anionic dye,eriochrome black T (EB) was evaluated in a batch adsorption process. Notably, the biosorbent removed77–99% of both cationic and anionic dyes in a wide ranging pH of 2–10, and the reactions wereendothermic. The dye adsorption equilibria were rapidly attained within 3 h. The monolayer adsorptioncapacity of the sorbent added at 5 g L 1 was 119.05, 126.8, 116.28 and 94.34 mg g 1 for MB, AO, MG andEB, respectively. The water extract obtained from the plant material induced fast decolourization of bothcategories of dyes followed by gradual flocculation, indicating its potential as a natural coagulant. Gaschromatographic analysis also indicated that the main electrostatic attraction between 1,8-cineole, 1-pmethene-8-thiol and furfural compounds of the biomaterial, and dye molecules resulted in theformation of initial supramolecular complexes which further progressed into strong aggregates, leadingto precipitation of dye–biomaterial complexes. Subsequently, the overall complex mechanism of dyeremoval was confirmed to be a combined process of adsorption and coagulation. Consistent with thebatch studies, using selected plant material in real environmental water samples also resulted ineffective dye removal, highlighting its potential for use in wastewater treatment.
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Synthesis and characterization of Co and Mn doped NiO nanoparticles
Kaliyan Vallalperuman,Mathivanan Parthibavarman,Sekar Sathishkumar,Manickam Durairaj,Kuppusamy Thavamani 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.4
Diluted magnetic semiconductors (DMS) are intensively studied for their potential spintronics applications,especially those with Curie temperature above the room temperature. Ni1−xMnxO and Ni1−xCoxO (x=1% & 2%),nanoparticles with size around 40-50 nm, were prepared by co-precipitation method. An NiO single phase structurewas confirmed by powder X-ray diffraction measurements. Also, diffraction peaks show a systematic shift towardshigher angle with an increase in Mn concentration, which is associated with the lattice variation. The samples werepelleted and examined for its magnetic property using a vibrating sample magnetometer (VSM); it indicates paramagnetic-like behavior at room temperature. The increase in a.c conductivity with increasing temperature is attributed tothe increase in drift mobility of the charge carriers.
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