Author
Nirmala Gnanasundaram
Bio: Nirmala Gnanasundaram is an academic researcher from VIT University. The author has contributed to research in topics: Chemistry & Viscosity. The author has an hindex of 7, co-authored 11 publications receiving 187 citations.
Papers
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TL;DR: In this article, a review of asphaltene self-aggregation in crude oil is presented, with the aim to understand the mechanism of petroleum asphalte aggregation with the help of the studied model compounds and discuss the recent developments with respect to its colloidal and interfacial activity.
72 citations
TL;DR: In this article, the effect of initial lignin contents and parameters (namely, particle size range, extraction temperature, time and solid loading) on the extraction efficiency were analyzed and optimized using response surface methodology.
58 citations
TL;DR: In this article, a review summarizes the recent literature on the adsorptive removal of BTEX from wastewater using carbon nanotubes (CNTs) and recognizes a number of encouraging avenues and approaches for the upcoming research thrust.
54 citations
TL;DR: In this paper, a conductor-like screening model for real solvents (COSMO-RS) was used to screen ionic liquids (ILs) for potential extractant for asphaltene.
29 citations
01 Oct 2017
TL;DR: The effect of microwave assissted extraction of pigments from beetroot peels was studied in this article, where the authors used the Box-Behnken method as the RSM optimization technique for both the solvents used.
Abstract: The effect of microwave assissted extraction of pigments from beetroot peels was studied. Oven Drying followed by microwave assisted extraction was decided as the experimental procedure to be followed because of better absorbance in the range of 0.2-0.4. A microwave assisted extraction procedure is said to open the vacuolar pores inside beetroot powder.The Box-Behnken method was used as the RSM optimization technique. A quadratic model was suggested for both the solvents used. The optimized conditions for Solvent A were pH 5.20, Microwave Power of 224.61MW and Time 57.06 seconds for a Betanin Concentration of 229.264mg/L. The optimized conditions for Solvent B were found to be pH4.74, Microwave Power 384.25MW, Time 74.91 seconds and Betanin Concentration 472.113mg/L. The order of the extraction process was calculated as 1.42 and the rate constant as 0.00126. FTIR results confirm similar functional groups before and after the treatment. FTIR results confirm the presence of O–H stretch, C-H stretch, H–bonded, C-C stretch, N–H bend.
28 citations
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TL;DR: The aim of this review article is to provide new data on the study and the improvement in this specific field, and to provide a version of the uses, benefits and restrictions of nanosorbents in water and wastewater remediation.
153 citations
TL;DR: In this article, Box-Behnken design in response surface methodology (RSM) was applied to optimize the synthesis condition of crosslinked chitosan-tripolyphosphate/TiO2 nanocompsite.
140 citations
TL;DR: In this paper, the role of physicochemical properties of the adsorbents, solution chemistry of the adorbates, and the uptake mechanism on the sorption performance of NAs was investigated.
136 citations
TL;DR: In this article, high-molecular-weight lignin obtained by ethanol-water fractionation of enzymatic hydrolysis Lignin, was moderately depolymerized via in situ ethanol/acid catalysis to improve its solubility and antioxidant activity.
111 citations
TL;DR: This review describes the advances in the area of green IL-related research and emphasizes the new conceptual development of ILs in pharmaceutics and medicine, stimulating the understanding of innovative technologies in IL-based drug delivery systems.
101 citations