Vartika Srivastava

Rajiv Gandhi Institute of Petroleum Technology | RGIPT · chemical science

By integrating the benefits of poly vinyl alcohol (PVA) and chitosan (CS) with α-MnO2 nanoparticles (MNPs), a novel type of nano-polymer composite (PVA/CS-MNP) membrane was synthesized through a simple and facile casting method. In this proposed work, the membrane prepared was used for removal of organic textile dyes from their aqueous solutions. T...

Injection of surfactant and polymer slug is among the most effective chemical enhanced oil recovery processes. The only problem encountered with the surfactant polymer (SP) flooding is the loss of surface-active agents that reduce the efficiency of surfactants in the chemical slug. Various attempts to modify SP flooding have been made previously so...

The current paper summarizes the development of nano-enhanced phase change materials (NPCMs) using capric acid (CA) and manganese dioxide (α-MnO2) nanoparticles. The nanoparticles were obtained by the green synthesis technique using the leaves of Ficus retusa plant. The obtained nanoparticles were used in 1%, 2%, and 3 % weight fractions in the nan...

Over the past few decades, the urge for fresh and pure water has been rising each day. The need of the hour is to develop such viable technologies which are economical, have greater efficacy and lower carbon footprint over conventional methods. The current chapter features modern research studies related to the application of nanocellulose and its...

This work aims at evaluating advancement in water shut-off performance using nanocomposite hydrogel (PVP-ZnO:RF) prepared from PolyVinylPyrrolidone (PVP); used as polymer, Resorcinol-Formaldehyde (RF); used as a crosslinker and nano Zinc Oxide (ZnO); used as strength modifier and it was compared with conventional hydrogel (PVP:RF) i.e. , hydrogel w...

A significant parameter in the drilling of a petroleum wellbore is to design a drilling fluid with good control on its rheology and fluid loss characteristics. The present study aims at designing a drilling mud with improved properties in terms of rheology and filtration loss. Effect of laboratory synthesized α-MnO2 nanoparticles (MNPs) on the prop...

A novel type of polymer beads (CS/CuO nanocomposite beads) were formulated by incorporating laboratory synthesized CuO nanoparticles into pure chitosan (CS) beads. The CuO nanoparticles (NPs) used for immobilization were synthesized through simple, environment friendly and cost effective green route using plant extract of Ficus retusa. These beads...

The leaf extract of Ficus retusa plant was used for fabrication of α-MnO2 nanoparticles (NPs). The extract was utilized as a reducing agent for green synthesis of nanomaterial. The synthesis of nanocrystals was confirmed using different analytical techniques such as field emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDX)...

A stable dispersion of nano-structured silver particles (AgNPs) was synthesized using an aqueous extract of Citrus sinensis (orange) peel extract. Formation of AgNPs was confirmed using UV–visible spectroscopy. In the process, orange peel was used as both reducing agent and stabilizing agent. In the presence of extract, nanoparticles remained stabl...

In this study, a green route has been adopted to successfully synthesize pure zinc oxide nanoparticles (ZnONPs) as well as Cu doped zinc oxide nanoparticles (Cu-ZnONPs) which is quite a novel work. The synthesized nanoparticles (NPs) were used as adsorbent for removal of Congo red (CR) dye from aqueous solution and efficiency of both doped and undo...

Pyrolysis of rice straw has been carried out under hydrogen atmosphere at 300, 350, 400 and 450°C and pressures of 1, 10, 20, 30 and 40bar and in nitrogen atmosphere, experiments have been carried out at the same temperatures. It has been observed that the optimum process conditions for hydropyrolysis are 400°C and 30bar pressure and for slow pyrol...

Hydrothermal liquefaction of rice straw has been carried out using various organic solvents (CH3OH, C2H5OH) at different temperatures (250, 280 and 300 °C) and residence times (15, 30 and 60 min) to understand the effect of solvent and various reaction parameters on product distribution. Maximum liquid product yield (47.52 wt.%) was observed using...