Publications by authors named "Manis Kumar Jha"
Novel route has been developed to selectively extract lithium (Li), cobalt (Co) and manganese (Mn) from the leach liquor of discarded lithium ion batteries (LIBs) containing 1.4 g/L Cu, 1.1 g/L Ni, 11.
View Article and Find Full Text PDFAn innovative environmental process for the treatment of scrap Nd-Fe-B magnets.
J Environ Manage
November 2020
Strict environmental regulations as well as requirement of conservation of natural resources compelled the researchers to recycle the metal values from secondary resources. The scrap magnets found to be a potential alternative resource to extract rare earth metal, Nd. Present paper reports a novel process flow-sheet for the recycling of scrap Nd-Fe-B magnets to recover Nd as marketable salt and other valuable by-products.
View Article and Find Full Text PDFArticle Synopsis
- An eco-friendly leaching process for recovering lithium and cobalt from spent lithium-ion batteries is developed, addressing environmental regulations and resource limitations.
- The optimal conditions for leaching were found to be 2M sulfuric acid with 5% hydrogen peroxide at 100 g/L pulp density and 75°C, achieving 99.1% lithium and 70% cobalt recovery in 60 minutes.
- The leaching kinetics followed specific models, indicating that chemical reactions and diffusion processes govern the extraction of these metals, which can be further purified through solvent extraction and crystallization.
Printed circuit boards (PCBs) are the most essential components of all electrical and electronic equipments, which contain noteworthy quantity of metals, some of which are toxic to life and all of which are valuable resources. Therefore, recycling of PCBs is necessary for the safe disposal/utilization of these metals. Present paper is a part of developing Indo-Korean recycling technique consists of organic swelling pre-treatment technique for the liberation of thin layer of metallic sheet and the treatment of epoxy resin to remove/recover toxic soldering material.
View Article and Find Full Text PDFIn view of the increasing importance of the waste processing and recycling to meet the strict environmental regulations, the present investigation reports an adsorption process using the cationic exchanger Amberlite IR 120 for the recovery/removal of copper from the synthetic sulphate solution containing copper