7 research outputs found
Organic waste valorisation into biochar for the adsorptive removal of Malachite Green dye from its aqueous solution
No full textThis study illustrated the biochar utilization as an adsorbent to remove the Malachite Green (MG) dye which is known to cause toxic and hazardous effects. The present research aimed to determine how well biochar adsorbs malachite green dye and comprehend the fundamental principles driving adsorption. The iron-impregnated biochar was synthesized using waste biomass of Teak (Tectona speciose), which is a timber tree, by pyrolysis process at 500 °C. The synthesized biochar was used to remove MG dye from a synthetically prepared MG solution to evaluate its adsorption efficiency. The bioadsorbent was characterized using Particle Size Analysis (PSA), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), point of zero charges (pHZPC), Energy Dispersive X-ray (EDX). A batch adsorption experiment for the MG adsorption onto the MB-t surface was also conducted and it was found that the adsorption rate of MG was highly affected by the dose of biochar, temperature, working solution pH, time of contact and primary dye concentration. Isotherm study showed that the Temkin was the best-fit isotherm model to the adsorption process and the Qmax value was discovered to be 73.539 mg/g. Pseudo-second-order kinetics was best suited to the process of adsorption, indicating that the chemisorption was the rate-limiting factor. In contrast, the adsorption process was exothermic, which was determined through a thermodynamic study. The effective removal (89.05 %) of MG dye onto biochar (synthesized from Teak biomass the first time applied for dye removal) within 1 hr proved the bioadsorbent as a promising material for treating contaminated water.
Membrane-Less Microbial Fuel Cell: A Low-cost Sustainable Approach for Clean Energy and Environment
No full text
Trends in harnessing energy from waste biomass: pathways & future potential
No full textDemand for fuel energy is continually on the rise. There is also a constant challenge involved to ensure that all our energy needs are fulfilled. Persistent overconsumption of conventional fossil fuels due to the rise in global population aided by economic expansion has resulted in reduction of fossil fuel reserves. This has fuelled the need to boost research efforts on renewable and sustainable bioenergy feedstocks. Since bioenergy utilizes organic matter; therefore, it is an economically viable and clean solution, which can minimize our reliance on non-renewable resources. The bioprocessing of lignocellulosic biomass to produce bio-based products under biorefinery setup is gaining global attention. The main challenge however remains to strike a balance between energy harvesting and economic viability with minimum environmental impacts. The development of zero-waste lignocellulosic biorefinery aligns completely with the idea of sustainable development without increasing carbon footprint. This concept is self-sustainable. It also advocates re-usage or recycling of waste; of which using lignocellulosic biomass waste is a major thrust. Improving the techno-economic efficiency of currently employed pretreatment methods and looking for combined pretreatment strategies will prove to be a stepping stone in the commercialization of zero-waste lignocellulosic biorefineries. This review investigates the most widespread pretreatment types, highlighs their advantages/disadvantages, and reviews the current status and technological advances in the bioconversion process of LCB into bioenergy in a biorefinery set-up
