Purple rice bran extract (PRBE), an eco-friendly, inexpensive “green corrosion inhibitor,” was studied on boiler quality (BQ) steel in acidic solution (1 M HCl) to evaluate its ability of corrosion inhibition by various electrochemical techniques: potentiodynamic polarization test (PDP), electrochemical impedance spectroscopy (EIS). From the electrochemical tests, the enhanced inhibition efficiency of PRBE was found to be up to 83
The experiment aimed to grow Chlorella vulgaris in a mixture of Kraft paper effluent and biogas slurry, to treat industrial wastewater and produce biodiesel. Cultivation of Chlorella vulgaris in a batch reactor for 18 days was done in six different proportions of (Kraft paper effluent: biogas slurry, v/v) 20
E-Waste is increasing at an alarming rate of 2 million metric tonnes (Mt) per annum. E-waste covers a wide range of electrical and electronic equipment (EEE), such as mobile phones, laptops and refrigerators. Printed circuit board (PCB) is an indispensable and the most valuable component of any EEE. PCB contributes 2
In this work, the graphene oxide framework (GOF) was synthesized by cross-linking GO with the inorganic borate functional groups of sodium tetraborate using dopamine as a crosslinker. The obtained GOF was further characterized via FTIR, EDX, and XRD. Moreover, the GOF-assisted UF membranes were fabricated using PSF–PEG flat sheets as the substrate via a layer-by-layer (LBL) assembly technique. Further, the separation performance of the fabricated membranes of different GOF compositions was estimated using pure water flux (PWF) and the rejection rate study for heavy metal ions. The GOF-assisted membrane presented better permeability and heavy metal ion rejection rates for Pb2+, Cd2+, and Cr3+ions with 96, 94, and > 90
Flow hydrodynamics in the main channel due to floodplain sand mining is important for a better understanding of maintaining the natural habitat or the reliance between the flood plain and the main channel for the river's long-term survival and also facilitates more effective river restoration engineering. Day by day anthropogenic stresses are increasing in the river corridor system, indiscriminate sand mining is one of them. In this study, a computational fluid dynamics (CFD)-based software Flow-3D hydro (renormalized group K-ε turbulence model used) is used to study the flow hydrodynamics of sinuous (sinuosity index = 1.25) channel 18 m long, 1 m width, and 0.3 m height with floodplain sand mining pit. Sand mining additionally increases the secondary current near the outer bank of the channel, therefore leading to scouring or erosion at the outer bank, as a result, rivers migrate laterally. The turbulence kinetic energy (TKE) is concentrated in the mining pit and near the inner bank. This study result can be used to understand the flow hydrodynamic of the river system due to the series of sand mining.
